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.

D3 Integrated PIC-XBee with LCD Display, LED, and Thermistor

DSO Nano

New very portable lab instrument: DSO Nano by Seeed Studio scope with upgraded third-party firmware (Paul). Great folks to work with, I highly recommend Seeed Studio. You can go directly to their site by clicking on the title to this post.

Guitar Pre-Amp

D3 pre-amp circuit for guitar amplifier project.

Peep!

15th Mass Infantry Company K

Hersey Estes, great-great-grandfather, served (1861-1863) in all the major battles of the Army of Potomac from Ball's Bluff through Antietam where >50% of his regiment was lost in 30 minutes when outflanked in the West Woods....no other regiment suffered a greater loss for the day....I'm lucky to be here!

Clicking on the title of this post will bring you to an exceptional research site on the 15MVI.

Ladybugs Like Grapes!