This is a simple project, but one I hope you will find useful. Recent upgrades of 2 of my PC’s with bang-up-to-date motherboards, have demonstrated a need for USB ‘A’ socket headers, either to fit on a standard PC Component plate, or a spare blanking panel on the front of the PC. I’ve tried sourcing [...]

Miniature usb capslocker, this is exactly the same as original project, i have made even smaller board. Dimensions are: 2.5mm x 11mm x 12mm, used pcb can not be thicker than 0.75mm, else it wont fit into USB. Source:diy.elektroda.eu/

This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb. It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. One of the inputs can be scaled down with the trim pot. The firmware in the Tiny45 is [...]

Introduction I need for my high quality DAC convertor from USB to S/PDIF. I choose PCM2704 circuit, which sent me TI company like sample. Circuit has analog output for headphones and digital S/PDIF output with electrical and optical(TOSLINK) interface. We can use too 3 HID buttons for setting volume and mute. Circuit description Schematics is [...]

This is the USB controlled Atmega8 microcontroller based power supply. Starting with the Visual Basic and IOCOMP software. FT232RL for the USB connection. Source: Ben

This is a simple design that demonstrates the USB peripheral on the PIC 18Fs. There are a bunch of examples for the 18F4550 40 pin chips online, this design demonstrates the smaller 18F2550 28 pin version. The PCB uses surface mount parts, but all components are available in through hole versions. Source: ian

In this microcontroller project, Guido Socher design a state of the art USB programmer for the AVR microcontrollers from Atmel. You can build it from scratch without the need of another programmer to load the initial firmware.The firmware is open source and programmed in C according to the AVR068 specification from Atmel. Source: tuxgraphics

Parts List: Description QTY Atmel ATMEGA8-16PI 1 74HC126N Quad Buffer 1 12 MHz Crystal HC49/US 1 28 pin IC socket 1 14 pin IC socket (optional) 1 Resistor Carbon Film 68 Ohm 1/4 Watt 10% 2 Resistor Carbon Film 270 Ohm 1/4 Watt 10% 1 Resistor Carbon Film 1K Ohm 1/4 Watt 10% 2 Resistor [...]

The following page will show you how to build your own infrared receiver for the serial port. With this project “IR Receiver For PC” you can control applications with remote controls . The power for the circuit comes from the RTS line of the serial port. D1 protects the circuit from the negative voltage that [...]