Author Archives: Andi

Illuminating Automotive Displays

In recent years, there has been a substantial improvement in automotive displays. Automotive manufacturers now integrate these displays in various applications within the automobile, such as in mirror replacements, central information displays or CIDs, instrument clusters, entertainment displays for the rear seats, and many more. Sometimes, such displays can total up to twelve per vehicle.

Most of these displays use thin-film transistor or TFT driving liquid crystal displays or LCD for enhanced brightness and reliability at reasonable costs. However, there is an increasing need for better picture quality, as the display must also handle real-time video feed from cameras. In addition, an increase in display size is necessary due to the merging of CID and instrument clusters. With these requirements, the displays consume more power, and often, the timing controller or internal power supply source drivers cannot provide this. Therefore, there is a need for a suitable power supply that can handle these high-quality automotive displays.

Although many solutions exist for such TFT-Bias power supply devices, the display panel options are highly variable, and most have an expanded set of feature requirements. This leads to power supply designers considering a few needs for TFT-LCD display systems—high-quality display, source driving, functional safety, EMI mitigation, fast turn-on time, and low total solution cost.

Manufacturers use several TFT technologies for display panel solutions. However, each of them has its own set of benefits, needs, and limitations. For instance, two very common TFT technologies are the Low-Temperature Polysilicon LTPS and the Amorphous Silicon or A-SI panels. While driving an A-Si panel requires a unipolar source driver, the LTPS panels typically require a bipolar source driver.

Manufacturers bond unipolar A-Si source drivers to the edges of the display panel. Multiple digital to analog converters—one for each display column—drive the sources of the TFTs. Depending on the received video signal, the output voltage of the DACs varies, thereby setting the transmissivity of the LC panels. With the common rail for the display backplane set at approximately half the supply voltage, the source driver voltage is free to alternate between zero and full supply voltage.

Using LTPS technology, manufacturers can implement all the necessary circuits, including the bipolar LTPS source driver, directly on the glass of the display panel. This precludes the requirement of a storage capacitor in parallel with the subpixels, The higher carrier mobility in the transistors leads to higher performance in LTPS panels, and subsequently to advanced features.

Optimal display panel performance differentiates the high display quality necessary and requires support from consistent pixel response. However, imperfections in materials and processes often lead to deviations in parameter performance in physical manifestations of display solutions. These imperfections change the electrical characteristics of materials, which the design must account for while stabilizing the performance of the end product. This requires calibration methods where the voltage of the common rail is set.

The common rail voltage must also be compensated for temperature variations. This is because panel characteristics change over temperature, and the common rail voltage must also adjust for the display panel functionality to remain consistent.

Retail Energy Management through IoT

Most people prefer to visit big stores like Walmart and Costco for buying almost everything from iPhones to ice-creams. But running huge stores is not an easy task, and the superstores are always on the lookout for ways to cut costs by streamlining their operations.

With superstores the size of a city block, streamlining operations is not simple. Substantial resources—time and staff—are necessary to keep store lighting, food court ovens, HVAC systems, and digital displays running at maximum efficiency.

The stores may have hundreds of freezers and refrigeration units operating at the same time. Constantly monitoring them for meeting government regulations, while manually adjusting them, can lead to food safety compromises. A breakdown can halt services and food sales, slashing profits and irritating customers. While the retail sector increasingly adopts sophisticated digital solutions, its inefficient management of energy systems can become an anomaly.

With the recent pandemic causing a worldwide worker shortage and subsequent rise in labor costs, retailers would rather not add people for tracking and monitoring their back-end facility.

Traditional energy management systems available on the market operate in two ways. First, system integrators must build from scratch a software program for managing energy consumption to make the effort feasible, but this is too resource-intensive. The other may require purchasing an off-the-shelf system for building management—such as those that office towers and apartment buildings use. But these systems are usually not customizable, and they do not accommodate retailers. This is where a new platform has become necessary.

IBASE and Novakon have created a new platform for managing energy. They have designed the IBASE platform specifically for retailers. The platform, IBASE IoT Energy Management Platform, can monitor and manage refrigerators, freezers, air conditioning, kiosk signs, food court appliances, and lighting. The IoT system connects everything to the Internet, which allows tracking, monitoring, and controlling them possible in real-time.

Therefore, retailers no longer need a staffer to tend to freezers and refrigerators. Instead, they can concentrate on their own activities. The system does the tracking and data recording from multiple sensors that transmit new information all the time.

The new platform allows retailers to review the status of not only the refrigeration system but also the power that all connected devices and appliances consume. Anything going wrong brings up an immediate alert. The same alert also reaches the servicing company, so they can take up repair and maintenance immediately.

Moreover, the IBASE platform also has the capability to automatically turn HVAC and lighting on and off in synchronization with business hours. Retailers can tweak the system to match their special requirements to further save energy and money. Utility companies often offer discounts to businesses that can keep their power consumption below a certain threshold.

The IBASE platform is a real boon for large retailers—they can really save big on resources and energy. For instance, in a retail operation with 250 lighting devices, 36 air conditioners, and 22 power meters, staffers had to monitor each floor with notebooks, noting down appliance information every hour. The IBASE platform has transformed this.

Sensors for Structural Health Monitoring

Public bridges and roads require their structural health to be monitored, and engineers use sensors for continuous measurement. To power these embedded sensors, they exploit several sources of ambient energy. This can include vibrational energy obtained from vehicular traffic, which can generate adequate power for sensor nodes that engineers have built into the infrastructure. Off-the-shelf devices make it easier for engineers to design structural monitoring devices. Many manufacturers now provide such sensors.

Drivers are rather well-acquainted with potholes on the bridges and roads on which they frequently travel. However, apart from the surface damage, there are more insidious structural damages that may be less obvious. One of them is stress corrosion cracks in structural components that may lead to a bridge collapse.

Therefore, engineers are rightly concerned about existing infrastructure developing similar defects. The rise in vehicular traffic over bridges and roads, often going beyond the original design specifications, together with rapid aging from the stress, can lead to their continual wear and tear and deterioration. Engineers use Structural Health Monitoring or SHM based on continuous monitoring of infrastructure. This is critical for identifying structures at risk.

Monitoring the system through wireless means is more practical, as this avoids the expenses of using wired system monitoring. Wireless monitoring also leads to the simpler placement of sensors within the existing infrastructure. Powering the wireless sensors with energy harvesting techniques further enables avoiding the cost and maintenance concerns related to using batteries and their periodic replacement.

Engineers use various ambient sources for powering the nodes of SHM wireless sensors. This includes vibrational, thermal, and solar sources. Ultimately, the optimum choice depends less on the technical requirements but rather on the logistics, cost, and maintenance requirements related to the target structure. For instance, noise barriers may be necessary for roads in urban areas with heavy traffic. These noise barriers may double as solar panels for energy harvesting.

Some situations may offer alternative sources of energy for powering sensors. These could be thermoelectric generators or TECs, which generate power based on the temperature differential across them. Such differentials often exist between the subgrade layers and the pavement surface of a road. Although using TECs in new constructions may be quite effective, retrofitting in existing roads may involve prohibitive costs.

Engineers often use a heavier tip mass to augment the mechanical loading of a piezoelectric device. Such loading helps to reduce the natural frequency of the device, bringing it closer to the predominant frequencies from the ambient vibrational energy source, enabling maximization of power generation.

In some cases, the ambient vibrational energy source may have frequencies well below the tunable range of the piezoelectric devices available. Engineers then turn to alternative low-frequency vibrational energy transducers like electromagnetic generators. The low-frequency vibrations cause a spring-mounted magnetic core to move through a coil, thereby converting the energy of vibrations to a current following Faraday’s law of induction.

Ambient-powered wireless sensors also require power conditioning and management. Power management circuits monitor the energy harvested, regulate the voltage applied to the load, and use the excess energy to charge external energy storage devices like a rechargeable battery or a supercapacitor.

 Important Sensors

Engineers use two important types of sensors—superstar sensors and workhorse sensors. The superstar sensors usually provide information in high-profile applications such as advanced driver assistance systems, and engineers update them regularly for improving their performance. On the other hand, the workhorse sensors are more reliable, providing consistent information on more common applications. These workhorse sensors are simple to use, and meet the necessary performance specifications at reasonable price tags.

For instance, sensors have been readily available for detecting particulate matter in a dusty environment. However, in recent times, governments have tightened their regulations and have changed the definition of the acceptable levels of particulate matter. Advancement in technology has led to the development of small commodity dust sensors capable of being incorporated into mobile devices. This makes it easier for air monitors, air conditioners, and air purifiers to detect airborne dust particles in all types of environments.

Sharp Microelectronics offers a compact optical dust sensor, the GP2Y1010AU0F. It consists of an infrared light-emitting diode and a phototransistor placed in a diagonal position within the device. The phototransistor picks up infrared light reflected by dust particles. As the system is based on optical sensing, the device is thin and compact with dimensions of 46 x30 x 17.6 mm. The sensor from Sharp Microelectronics is sensitive enough to detect very fine particles such as those in cigarette smoke.

Honeywell offers their LLE Series of sensors for sensing liquid levels. Their technology uses a phototransistor trigger. The sensor can detect the presence or absence of liquid and presents the output in digital format. The sensor uses an LED and a phototransistor that Honeywell has placed inside a plastic dome at the head of the device. In the absence of liquid, light from the LED reaches the phototransistor after total internal reflections from the dome. As liquid fills up, it covers the dome, changing the refractive index at the liquid-dome boundary. This prevents light from the LED from reflecting back to the phototransistor, instantaneously switching the output and indicating the presence of liquid.

Omron offers their digital differential pressure-type mass-flow sensor, the D6F-PH. The sensor has an I2C output and uses a mass-flow MEMS chip, a proprietary of Omron. The company has redesigned the internal flow path such that it produces a high-velocity low flow for an impedance sensor to produce differential pressure. Users can buy these sensors in three models—for measuring a specific pressure range while being calibrated for several types of gases.

Measurement Specialties offers their compression load cell, the FC22. This is a low-cost, high-performance, medium compression force sensor. The sensor offers normalized zero and span, and thermal compensation for changes in span and zero as the temperature changes. The sensor is based on the Microfused technology of Measurement Specialties. It uses several micromachined piezoresistive strain gauges made of silicon fuzed with high-temperature glass to a stainless-steel substrate. While competitive designs suffer from lead-die fatigue, the FC22 sensor does not and can measure the direct force with unlimited life cycle expectancy, while offering superior resolution, and high over-range capabilities.

SensorTile Wireless Industrial Node

For testing advanced industrial IoT applications, ST Microelectronics offers a wireless industrial node, which they call the STWIN SensorTile. This development kit from ST amplifies prototyping of applications like predictive maintenance and condition monitoring.

The STWIN SensorTile kit has a core system board, using a microcontroller operating at ultra-low power. The microcontroller can analyze vibrations from motion-sensing data across 9 degrees of freedom. The vibrational data may cover a wide range of frequencies. The spectra can cover very high-frequency audio including ultrasound. It is also capable of monitoring local temperature and environmental conditions at high precision.

The user can also tie up the core system board with a wide range of embedded sensors of industrial-grade type. To aid in speeding up design cycles for providing end-to-end solutions, ST compliments the development kit with a rich set of optimized firmware libraries and software packages.

An on-board module on the kit provides BLE wireless connectivity. Users can connect a special plugin expansion board to get Wi-Fi connectivity. Those who require wired connectivity for their projects can use the onboard RS485 transceiver. ST has a host of daughter boards using the STM32 family. This includes the LTE Cell pack. Users can connect these compatible, small form factor, and low-cost daughter boards to the development kit through an on-board STMod+ connector.

Along with the core system board, the wireless industrial node kit also has a protective plastic case, a Li-Po battery rated for 480 mAh, a programming cable, and a STLINK-V3MINI programmer cum debugger for STM32.

Users can employ a comprehensive range of sensors available with the core system board. ST has specifically designed these sensors to enable and support industry 4.0 applications. The microcontroller has various serial interfaces for communicating with these sensors. The interfaces include SPI for communicating with motion sensors with high data rates, and I2C for communicating with environmental sensors and magnetometers. The microcontroller can directly communicate with analog and digital microphones.

When interfacing with analog microphones, a low-noise opamp amplifies the signal. An internal 12-bit ADC is available in the microcontroller for sampling the output from the opamp. A digital filter manages the signal output from digital microphones. The microcontroller has a Sigma-Delta modulator interface for signals from digital microphones.

The core system has several sensors on the board. These include a digital MEMS microphone of industrial grade, a wideband MEMS analog microphone, an ultra-low-power 3-axis magnetometer, a high-performance ultra-low-power MEMS motion sensor, an ultra-wide-bandwidth MEMS vibrometer up to 5 kHz, a 3D accelerometer and 3D gyro IMU with a core for machine-learning, a high-output current rail-to-rail dual opamp, a digital low-voltage local temperature sensor, a digital absolute pressure sensor, relative humidity and temperature sensor.

The ultra-low-power microcontroller in the STWIN core system board is a part of the STM32L4+ series of MCUs. The series is based on the ARM Cortex-M4 core, which is of the high-performance 32-bit RISC type. The processors operate up to 120 MHz, and the board has 2 MB Flash memory, along with 640 Kb SRAM. The board has several connectivity options of both wired and wireless types.

3-Axis Digital Output Gyroscope

The I3G4250D is a 3-axis gyroscope with a digital output that STMicroelectronics is offering. This low-power, angular rate sensor provides unprecedented stability over time and temperature and unmatched sensitivity at zero-rate levels. Included in the I3G4250D is a sensing element along with a serial digital interface that transfers the measured angular rate to the application. This data transfer happens over a high-speed digital serial peripheral interface. In addition, the gyroscope comes with an I2C interface as well.

ST manufactures the sensing element in the gyroscope with a unique micromachining process. ST has developed this process for producing inertial actuators and sensors on wafers of silicon.

A CMOS IC provides the interface, allowing a high level of design integration necessary for building a dedicated circuit. Then they trim this to specifically match the sensing element’s characteristics. Users can select the full-scale output of the sensor to be ±245, ±500, or ±2000 DPS. Moreover, the user can also select the bandwidth for measuring the rates.

ST offers this gyroscope as a Land Grid Array or LGA package made of plastic. It is capable of operating within an ambient temperature range of -40 °C to +85 °C. The gyroscope has some unique features. It can tolerate a supply voltage variation of 2.4 VDC to 3.6 VDC. With two digital output interfaces of I2C and SPI, the sensor provides data output for rate value at 16 bits, and data output for temperature at 8 bits. For interfacing with outside circuits, the sensor offers two digital output lines—an interrupt and a data-ready output. Users can select the bandwidth of low- and high-pass filters integrated within the IC. The sensor offers exceptionally stable outputs over time and temperature.

With low-voltage compatible Input/Output lines, the IC can interface with digital signals of 1.8 VDC levels. Along with an embedded temperature sensor, the IC also has an embedded FIFO and also embeds power down and sleep modes. The sensor is ECOPACK, Green, and RoHS compliant, and can survive high shocks.

To evaluate the MEMS devices within the I3G4250D family, ST offers an adapter board— the STEVAL-MKI169V1. This adapter board matches a standard DIL socket, offering an effective solution for speedy system prototyping and evaluation of devices that the user is directly applying.

The user can directly plug in the adapter board in a standard DIL socket with 24 pins and take advantage of the complete I3G4250D pin-outs. The adapter board also comes with the necessary decoupling capacitors mounted on the VDD power supply pins.

ST supports this adapter board with its motherboard, the  STEVAL-MKI109V2. The motherboard has a powerful 32-bit microcontroller to act as a bridge between a PC and the sensor. ST also provides a graphical user interface—the Unico GUI— for the PC, which the user can download and use. They also provide dedicated software routines to customize the applications.

ST has targeted the I3G4250D 3-axis gyroscope with a digital output mainly for industrial applications. However, users can use the gyroscope for applications like navigational systems and telematics. The device is also useful in man-machine interfaces like motion control, and for various appliances like robotics.

Phase Change Material with Magnets and Rubber

A research team from the University of Massachusetts is creating a phase change material made of magnets and rubber. They specifically place the magnets for predictable properties. Embedding magnets within the elastic material and coding their poles with different colors allows the team to orient the magnets in different directions. This changes the response of the material so that it can both absorb and release energy.

The magnets and rubber combination can not only drive high-power motion but can also quickly dampen impact-loading events. The material has several promising applications. It boosts the performance of robots, and improves helmets and other protective equipment, enabling them to dissipate energy quickly. The team uses laser cutters to make snug receptacles in the rubber for placing the 3 mm wide magnets, which are commonly available in stores.

Stretching the material causes a phase change, a physical property. By stretching it far enough, it is possible to reach a phase transition, where the material releases substantial potential energy. The team claims that the energy released can power a vehicle.

According to the researchers, the phase transition can store additional energy beyond that going into it mechanically. Therefore, a drone can easily recover this additional energy that the material releases. The excess energy gives the drone an extra boost.

The magnets assist in the phase shift, and this substantially amplifies the quantity of energy the material is releasing or absorbing. The team has discovered a way to use the magnets to fine-tune this phase shift.

The elastic properties of the rubber and the geometry of the holes determine the specific placement of the magnets. The team can tailor the specific response by controlling the elastic properties of the rubber strip, the hole geometry, the magnetic strength, and their placement positions. They claim the phase shift is both predictable and repeatable. They claim they can control the performance of the metamaterial, such as absorbing the energy caused by a large impact or releasing huge amounts of energy for an explosive movement. The team claims this metamaterial has helped them understand high-speed, high-acceleration movements.

The team has taken inspiration from similar fast-moving organisms in nature. This includes the trap-jaw ant and the mantis shrimp. Nature combines several fields to influence the way animals to store energy, including mechanically, chemically, or elastically.

To understand the concept that nature uses, the team combined magnetic fields with elastic forces. They combined them in synthetic materials for use in drones or robots. They claim they can tune the material to be efficient in the use of energy, such as for jumping robots that can transverse various obstacles.

Stretching the metamaterial makes it act just as a regular rubber band or a regular spring would. However, stretching it to a large extent makes the material go through a phase change, allowing it to store more energy than what it is receiving from the stretching. Releasing the material causes it to release the stored energy. A drone can use this extra energy for a boost.

Problems Mains Harmonics Cause

Single-phase power converters are specifically problematic since they generate significant levels of triplen harmonics, such as the 3rd, 9th, 15th, etc. As they do not undergo phase cancellation, they add up linearly in the neutral conductor to create a particular nuisance. Apart from this, they are also present in zero-phase transformer flux, and heat up cables and transformers. Although three-phase converters also generate harmonic emissions, the triplen currents produced by them are of much lower levels.

Other non-linear loads also contribute to harmonic currents in the mains supply. Such loads include motors and transformers, welding equipment and arc furnace rectifiers. Another source is the fluorescent lamp with magnetic ballast. However, rectifiers produce much higher frequencies as compared to that from fluorescent lamps.

The harmonic currents an equipment draws from the AC mains supply do not alter the power the equipment consumes when measured in Watts. However, the harmonic currents increase the VA rating of the equipment. Since Power Factor is the ratio of the Watts to the VA the equipment consumes, the equipment that produces significant emissions of harmonics also has a lower power factor.

A resistive load, such as an incandescent lamp, has a PF of 1.0 since it consumes the same amount of power in Watts, as it does in VA. Therefore, an incandescent lamp cannot emit any harmonic content. On the other hand, electronic equipment with rectifiers at the input and with no harmonic reduction techniques have power factors of around 0.6, implying they generate harmonic currents. Fluorescent lamps with magnetic ballast, running at 50/60 Hz, usually have PF of the order of 0.3, so they generate significant amounts of triplen harmonics.

The power factor of the load is significantly different from the power factor traditional electrical generation and distribution engineers use—the latter is the cosine of the angle between the sine-wave supply voltage and its load current. While the traditional PF assumes all loads are linear using sine wave voltages, engineers adjust this PF by adding capacitance or inductance to the power line, depending on whether the load is resistive, inductive, or capacitive.

However, the traditional method of PF correction for linear loads fails when trying to correct the PF of a rectifier-input electronic power converter. Mains power distribution networks are now driving significant numbers of electronic loads as these operate at higher efficiencies, and electronic loads are now replacing most linear loads.

The standard IEC 61000-4-7 [6] offers a survey of harmonics present in power supply systems. Typically, there are four major kinds of problems that harmonic currents cause when they are flowing in mains power supply networks:

  • Problems that harmonic currents themselves cause
  • Voltage distortion from harmonic currents
  • Problems that voltage distortions cause
  • Interference to telecommunication networks

In large installations with several single-phase electronic loads, such as in modern offices, the total neutral currents may reach as high as 1.7 times the highest phase current. This is the effect of harmonic currents, mainly the triplens, as these flow without being cancelled, in the neutral conductor. As many older buildings have half-sized or even smaller diameter neutrals, there can be a risk of fire hazard.

Raspberry Pi and Traffic Lights

Although we come across traffic lights almost every time we step out of our homes, we rarely stop to think about how they work. However, Gunnar Pelpman has done just that, and he has put the hugely popular single board computer, Raspberry Pi to good use. While most of the tutorials introduce turning on and off LEDs, he has prepared a somewhat more complex tutorial, one that teaches how to program traffic lights. Moreover, he has done this with the Raspberry Pi (RBPi) running the Windows 10 IoT Core.

Traffic Lights may look very complicated installations, but they are rather simple in operation. They mostly comprise a controller, the signal head, and the detection mechanism. The controller acts as the brains behind the installation and controls the information required to light up the lights through their various sequences. Depending on location and time of the day, traffic signals run under a variety of modes, of which two are the fixed time mode and the vehicle actuation mode.

Under the fixed time mode, the traffic signal will repeatedly display the three colors in fixed cycles, regardless of the traffic conditions. Although adequate in areas with heavy traffic congestion, this mode is very wasteful for a side road with light traffic—if for some cycles there are no waiting vehicles, the time could be more efficiently allocated to a busier approach.

The second most common mode of operation of the traffic signal is the vehicle actuation. As its name suggests, the traffic signal adjusts the cycle time according to the demands of vehicles on all approaches.

Sensors, installed in the carriageway or above the signal heads, register the demands of the traffic. After processing these demands, the controller allocates the cycle time accordingly. However, the controller has a preset minimum and maximum cycle time, and it cannot violate them.

The hardware for the project could not be simpler. Gunnar has used three LEDs—red, orange, and green—to represent the three in a traffic light. The LEDs have an appropriate resistor in series for current limiting, and three ports of the RBPi drive them on and off. The rest of the project is the software, for which Gunnar uses the UWP application.

According to Gunnar, there are two options for writing UWP applications—the first a blank UWP application and the second a background application for IoT—depending on your requirement. The blank UWP is good for trying things out as a start, as, at a later point of time, you can build a User Interface for your application.

After creating the project with the blank UWP application, Gunnar added a reference to Windows IoT Extensions for the UWP. Next, he opened the file MainPage.xaml and added his own code, which begins with a test for the wiring. He uses the init() function to initialize the GPIO pins and stop() to turn all LEDs off. Then the code turns on all LEDs for 10 seconds to signal everything is working fine.

According to Gunnar, the primitive code mimics the traffic lights. He uses a separate code for the cycling of the traffic lights, and another for blinking them on and off. He uses the play() function for running ten cycles of the traffic light.

USB Type C and USB 3.1 Gen 2 – What is the Difference?

With the need for increasing capabilities, USB technology has evolved and improved over several years. Recently, the USB Implementation Forum has released the specifications for the SuperSpeed+1 standard or USB 3.1 Gen 2 signal standard and the USB Type C connector. Data transfer rates have been increasing from USB 1.0, released in January 1996, with a full speed of 1.5 MB/s, to USB 2.0, released in April 2000, with full speed of 60 MB/s, and to USB 3.0, released in Nov 2008, with a full speed of 625 MB/s. The latest standard, USB 3.1 Gen 2 was released in Jul 2013, and has a full speed of 1.25 GB/s.

Confusion between USB Type C and USB 3.1 Gen 2

When discussing the relationship, people are often confused between the USB Type C and the USB 3.1 Gen 2 standard. The major point to note is the USB Type C standard defines the physical connector alone, whereas the USB 3.1 Gen 2 standard defines the electrical signal for communication.

Therefore, system designers have the freedom to select signals conforming to USB 3.1 Gen 2 to pass through USB Type C connectors and cables or through a connector that do not conform to the USB Type C specification. Designers can implement their own proprietary connector and still use the USB 3.1 Gen 2 signal standard in case they want to use their own hardware or to ensure their system remains isolated from other systems.

The reverse is also equally true and applicable. One can use the USB Type C connector to transmit and receive signals that do not conform to the USB signal standards. Although the implementation will benefit from the inexpensive and easily available USB Type C connectors and cables, the OEM must label it correctly, since the user will be at the risk of connecting the proprietary non-conforming system to a USB 3.1 Gen 2 standard system and damaging one or both the systems.

OEMs can also transmit legacy USB signaling configurations using the USB Type C connectors and cables. This is because the USB standard allows using pre-USB 3.1 Gen 2 on USB Type C connectors, as they have designed the standard to cause no damage to either system. However, the most optimum power and data transfer will occur only when both systems are negotiating a common power configuration and communication standard.

Why USB Type C

Compared to the older configurations, the use of the USB Type C connector offers several advantages. Apart from being a smaller package with more conductors, the USB Type C supports higher voltage and current ratings, while offering greater signal bandwidths.

Physically smaller, the USB Type C plugs and receptacles fit in a wide range of applications where space is restricted. Moreover, one can connect the plugs and receptacles any way—either right-side up or up-side down. This allows easier and faster insertions of plugs into their receptacles.

While USB Type A and B connectors can have a maximum of four or five conductors, there are 24 contacts within the USB Type C and it can carry 3 A at 5 V, or 15 W of power.