Success !

Motor control circuit driven by Arduino with PWM code works great controlling robot drive motor!

Summer is Finaly Here....

Something Else to Save For....

Amazing custom shop, Perewitz Cycle...click on the title to this post for link to their site...great afternoon of bikes and burnouts!

D3 Robot Motor Control Module

High power IGBT's mounted to the heat sink with large clamping diodes on the first circuit board, and control logic with opto-isolators on the top board.

Trying to Keep Warm on a Cool Morning

Reverse Engineered Robonica AVR

D3 reverse engineered the schematic and used an Amtel AVRISP programmer (link via post title) to code an AVR on a board out of a Robonica (robonica.com) device.

D3 Design for an Optically Isolated Triac

Driven by a square wave, the light flashes at low frequencies followed by this unusual pulsing behavior in a narrow transition range as the frequency is increased beyond a few hundred Hz, and then returns to normal flashing at higher frequencies.