Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Animatronic hawk controlled by PIC MCU

Chris Merck have sent us an animatronic hawk project which was used as a prop for the movie “Lady Hawk”. He have made 7 axis motion: wings, tail, beak, body and 3D head motion. In the video bird looks like real and alive.   For bird control he used Microchip PIC16F627 microcontroller which forms and sends RC signals to hawk servos. Author also provides ASM source code where you can study the hawk control logic. Im just wandering how did he put all 7 servos inside the hawk and kept it look like real. Nice job. Continue reading

Simple digital capacitance meter

ChaN has this simple capacitance meter in its collection as nice experimental toy. Capacitance meter uses integration method.   Device measures capacitor charge time. As there is no ADC in AT90S2313 microcontroller there is and analog comparator functionality used with special technique. After some calibration he managed to get pretty good results. Firmware and circuit are included. Continue reading

AVR web server project

Ulrich Radig interfaced RTL8019AS Ethernet board to Atmega128 via ISA slot and this way implemented simple TCP/IP stack.   During experiments he made several versions of boards including separate network card interfaced to AVR via ISA slot, and single sided board version with RTL8019AS directly to it. Source code is available as open source. Continue reading

Ambitious Joystick interface to PC USB port

Grendel has built USB interface to MS Sidewinder 3D Pro Joystic which works as generic USB HID device and supports full functionality that allows to play most of games with this Joystic.   As interface heart there is AVR Atmega8 microcontroller used where software USB driver interacts with PC. Device doesn’t require specific drivers for WIN 98SE/2000/XP as it acts as generi HID device- just plug and play. He made two board prototypes one tobe mounted to PC case, another external box version. Newest project files are here. Continue reading

List of small AVR Tiny projects

Check out Blue Sky Projects for nice collection of AVR Tiny projects. Author constantly updates its collection with new projects that are all zipped for convenient download. All these smal projects are written in assembly language. Each project has small description and circuit attached but no PCBs as they all are being constructed on prototype board. This is good place to learn microcontroller interfacing and avr assembly language. Continue reading

PIC based small thermometer with USB interface

Device is more experimental and tend to be used to measure indoor and outdoor temperature. It uses PIC 18F2550 microcontroller with built in USB peripheral. Microcontroller reads sensor (TC1047A ) data and sends it via USB to PC.   USB firmware is taken from Microchip, so not a big knowledge of USB specific software is required. Hex file and other project details are available for download. Author left possibility to connect other sensors (humidity, pressure) to board and syndicate it to the web with Google earth information. Continue reading