New robot platform.....work-in-process photo... not shown: steering mechanism with stepper motor, battery box, control and communications subsystems.
Sunday, June 20, 2010
Sunday, June 6, 2010
New Motor Controller Design
D3 Design for an AVR controlled H Bridge motor controller based on high power FETS with complete PCB design.
Saturday, June 5, 2010
More Progess....
D3 is now using an ATMEGA 164PV10PU programmed via an AVR Dragon board, with remote Zigbee communications for speed control (bottom)....a power supply out of a LCD display (center) provides circuit voltages and 24VDC for the motor.
Wednesday, May 26, 2010
Success !
Motor control circuit driven by Arduino with PWM code works great controlling robot drive motor!
Thursday, May 20, 2010
Saturday, May 15, 2010
Thursday, May 6, 2010
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.
Wednesday, May 5, 2010
Tuesday, May 4, 2010
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.
Saturday, May 1, 2010
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.
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