This project is a USB Generic Human Interface Device (HID) device based on a PIC microcontroller. It is a USB interface for alphanumeric LCD display where the user as desired can program it. USB interface is implemented by using PIC18F2550 microcontroller ideal for low power (nanoWatt) and connectivity applications that benefit from the availability of three serial ports: FS-USB (12 Mbit/s), I2C and SPI (up to 10Mbit/s) and an asynchronous (LIN capable) serial port (EUSART). Large amounts of RAM memory for buffering and enhanced FLASH program memory make it ideal for embedded control and monitoring applications that require periodic connection with a (legacy free) personal computer via USB for data upload/download and/or firmware updates.
The hardware design is extremely simple. It can be build using the supplied PCB artwork or on a stripboard or breadboard. The circuit consists of a PIC18F2550 with a 20Mhz resonator and the required components for the LCD screen and the USB. The display is connected to the controller board using single strand wire. In addition, the contrast control potentiometer is placed underneath the board to allow easy adjustment after the LCD screen has been mounted.
USB LCD Controller is definitely useful since it can view various types of information taken from the PC such as temperature, time/date, MP3 song titles, emails, RSS feeds, all that LCD Smartie or other program supports. This provides ease in reading as well as accessing emails and songs in the playlist. Furthermore, the device can be easily constructed and reprogrammed, making it favorable to the users.
USB LCD Controller – [Link]
by Nathan Chantrell:
This is a small dev board I designed to make experimenting with and deploying the ESP8266 ESP-03 modules a bit easier. As well as breaking out all the pins to 2.54mm headers it has a position to fit either a DS18B20 temperature sensor or a DHT22 temperature/humidity sensor plus the required pull up resistor. It can be powered from 3.3V or 5V+* if the regulator is fitted and there is a footprint for a micro USB connector if required.
ESP8266 ESP-03 Dev Board – [Link]
An industrial plant is designed with different control systems in which it varies according to the equipment to be controlled. This design is a general-purpose engine control system, which handles fueled or electrically supplied small engines of industrial plant. It features a 1.0A power relay control, 2.0A relay for fuel pump control, and a lamp driver. The system is also capable of start-up/shut-down control with power sequence logic. It has independent fault protection against surges and possible fluctuations.
The design is comprised of a MC33814 engine control analog power IC, a USB to SPI dongle interface, and power conditioning circuitry. It drives the engine electrically or fueled through relays. It also drives the fuel injector that runs the equipment during fueled operation. All 5V VCC power required by the circuit is obtained from the MC33814 built-in power regulator. A 12V VBAT supply provides the power to the three internal voltage regulators. A PC communicates to this project through a USB/SPI dongle (KITUSBSPIDGLEVME) connected to the PC’s USB port. The Freescale SPIGen program provides the user interface to the MC33814 SPI port and allows the user to send commands to the IC and receive status from the IC.
This project is designed to drive several industrial engine functions, a set of screw terminals are designated for control outputs: tachometer output, lamp output, water heater output, two relay outputs, two injector outputs, and two ignition outputs. This kind of control system is very useful in machineries that are usually used in industrial plants for the convenience of the plant operators.
Industrial Small Engine Control – [Link]
nScope is a USB-powered oscilloscope, function generator, and power supply that turns any laptop into an electronics workbench.
nScope is a usb-powered device that plugs into an electronics prototyping breadboard. nScope’s main function is an oscilloscope. Much like a multimeter, an oscilloscope measures voltages in a circuit. But unlike a multimeter, it stores voltages over time and displays them in a graph. This makes nScope much more useful for observing sensor signals and dynamic circuits. nScope’s software interface maximizes the graph space, and provides controls for setting the measurement speed and range.
nScope | a lab for every laptop – [Link]
Jayakody published a new project, a 3A Power supply for USB devices:
This is 5V 3A power supply to drive two USB based devices simultaneously. This power supply is design around LM2576-5.0 switching regulator IC and the main reasons to choose this IC is its low parts count, small heat sink requirements and its inbuilt current limit protection feature.
We specially design this power supply to work with development boards / single board computer (SBC) platforms such as Raspberry Pi, Banana Pi, BeagleBone, etc. This power supply can also be used to provide power to USB OTG peripherals over USB Y cables. We test this setup and got successful results with Huawei Ascend P6 mobile phone.
3A Power supply for USB devices – [Link]
The Pocket Voltage Supply plugs into any 5V USB hub & allows the user to output 5V,3.3V,2.5V,1.8V,&1.5V. Use it for all your projects!
The Pocket Voltage Supply is a USB powered variable voltage supply. It can be powered with any 5V USB hub and can supply up to 1.5A. 5V USB hubs can be found almost anywhere; desktop computers, laptops, cell phone chargers, even portable USB battery banks. Pairing the Pocket Voltage Supply with a portable USB battery bank allows the user to test circuits and prototypes outside of a lab setting and even bring testing to the field!
Pocket Voltage Supply: A USB Powered Variable Voltage Supply – [Link]
Always handy small but versatile power supply for everyday work with low-power electronic projects
Presenting USBminiPower – the pocket power supply powered from a standard USB port on your computer.
The adjustable power supply is an absolutely vital piece of equipment for any electronics engineer or hobbyist. However in the vast majority of cases the needs presented towards a lab power supply are quite relaxed and usually within the low voltage range. With the modern component base the current consumption is usually also very low, and in a number of cases a large and fancy (and of course expensive) lab power supply could just be an overkill purchase for many users.
Pocket USB-powered power supply for the hobbyist – [Link]
by Naomi Price & Martin Rowe @ edn.com:
USB data-acquisition modules offer good value and ease of use, which makes them an attractive choice for manufacturing test. But before you use the modules in a manufacturing test system, you need to take steps to protect them. During manufacturing test of circuit boards or subassemblies, a defect in an assembly may result in a condition that damages a data-acquisition module.
The typical USB DIO (digital I/O) module uses a set of 8-bit bidirectional tristate ports. Figure 1 shows a typical circuit that we test with one of those ports. We use one digital output pin from the USB module to drive the circuit and one digital input pin to read the circuit’s response.
Protect USB measurement circuits – [Link]
microtherion has published new project the ChipHeadBang, that is available on Github:
Design for an USB to Serial converter with ICSP header for (slow) bitbang programming, based on the CH340G chip.
While this seems to work pretty well, and the CH340G can be obtained extremely cheaply from sources such as AliExpress, driver support can be a bit iffy. For current versions of OS X, the vendor provided driver will cause kernel panics, and as far as I know, only this commercial alternative will work
ChipHeadBang – design for an USB to Serial converter with ICSP header – [Link]
by Abhishek Gupta @ edn.com:
In the last 14 years, the Universal Serial Bus (USB) has become the standard interface to connect devices to a computer. Whether it’s an external hard drive, a camera, the mouse, a printer, or a scanner, the physical connection to transfer data between devices generally is a USB cable. The interface is indeed universal.
USB technology has been under development since 1993. The first official definition, USB 1.0, was introduced in 1996. It provides a Low-Speed transfer rate of 1.5 Mbits/s for sub-channel keyboards and mice, and a Full-Speed channel at 12 Mbits/s. USB 2.0, which came in 2001, made a leap to Hi-Speed transfer rates of up to 480 Mbits/s. In 2010, USB 3.0 finally hit the market.
USB 3.0 – Everything you need to know – [Link]