18th Apr 2009

Arduino Proto Board

An Arduino compatible proto board was realized as part of a larger project. Provisions were made to include additional features for future use. The board is based on the Atmega128...

31st Dec 2008

Data Logging Weigh Scale

Implemented here is a data logging digital weigh scale. The original scale was gutted, leaving the four strain gauges, one per leg.  The main controller is an AtMega32. An AD623...

04th Nov 2008

IR LED Matrix with DMX-512 Control

A complete computer controlled lighting system implemented as an art installation was realized using the DMX-512 protocol. OpenDMX was used for sending packets along a multi-drop RS-485 bus. AtTiny2313?s were...

17th Apr 2008

Ultrasonic Resonant Tracker

  1) Schematic  2) Power (blue) & Phase Angle (pink)  3) Resonant mode frequency sweep  4) AD9833 (MSOP) breakout board As a part of a larger project, the requirement to...

31st Mar 2008

AVR Direct Digital Synthesis

An AVR based R2R DDS with controls for offset and gain.  Sine, sawtooth, square and triangle waveforms are stored in look up tables in the Atmega16?s internal flash. An LM358...

29th Feb 2008

X-Wing Class AB Power Amp

A class AB power amp was designed to run a 200 watt ultrasonic transducer. The topology is a qsc cascode type amp running from +/- 80 volts DC. 1) Schematic ...

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