UPDATE - 8. sept. 2010 - first h-bridge and controller board done.---
This is part of my biggest robot project ... It has enough degrees of freedom (5+gripper), enough speed and strength. Made out of electric window motors (ultracheap, 12V, fast enough, geared and powerful), aluminium and servos for wrist. So far I have built the mechanics and built H-bridge.
Because it has no electronics it moves only when I connect it to battery. And it moves fast, and silent like a ninja, and, apparently strong enough to hurt me when bumping in my head.
Ulitmate goal is - big and awsome robot hand, controlled by atmega, what is connected to PC. On top of this hand there is a camera and laser for computer vision. And all of this is powered from PCs power supply or car battery.
Hbridge board has attiny13 for control, serial input, adc input for potentiometer (do know on what angle the joints are), programming header, TLE5206 5A H-bridges, red led connected to error_flag pin (should show when there is short circuit), and couple of capacitors. 5206's datasheet said that it has protection diodes and other stuff like that so I believed it..
- Order Attinys
- Make hbridge boards (One done)
- Test hbridges with car battery. (One tested)
- Program hbridge board..
- Make gripper
- Test some more
- Make Atmega controller board. (Design is done, first prototype is done)
- Test even more
- Make and use USB-to-TTL module (Built but not programmed jet.)
- And even more testing
- Acquire a webcam and laser pointer
- Program like a weasel
- Hook everything up with my extra pc
- Install OS to PC
Materjals and cost:
- 2x servo from ebay - $10
- 3x electric window motors from scrapjard - $15
- bunch of aluminum from scrapjard - $1
- piece of wood - nothing
- endless amount of bolts and nuts - $5
- 3x TLE5206 5A H-bridges - $13.50
- Old PC from whereever - free
- 10x Attiny13 - $10