Working on a PICAXE board for robot building - working on v0.9
June 18, 2011
I'm getting on with making a small PICAXE-driven board similar to the uBotino. I've got it moving along and am ready for other thoughts at this point.
A quick copy/paste from my blog with a little more info:
The Rev-Ed board is nice but there are a few features I don't care for. My PICAXE 20X2 Robot Builder Board does away with/adds those things. And it's only 50mm square.
post Ro-bot-X mods:
Post CtC and ignoblegnome suggestions (click for full size):
v0.6.2 (added switched power to SN754410 per ignoblegnome's observation):
The list of features I'm aiming for:
- Powerful X2 series processor (Rev-Ed's board uses M2/X/M processors)
- Can use 3AA alkaline, 4AA NiMH, or higher voltage battery packs with the 5V 3A LDO on-board voltage regulator (can be disabled for AA battery packs)
- Included quad H-bridge driver for bi-directional control of two small motors with power supply selection
- Option for PWM of motor driver's ENABLE lines for speed control
- Five pins available for working with servos or LEDs (resistors selected with individual DIP switches)
- Selectable power source for Port B power header via jumper (allows use of 6V or 7.2V for servos, in particular)
- Ability to use both SEROUT and A.0 pin on leg 19, jumper selectable
- Robust screw-down terminal blocks for power connection
- Power indicator LED
There isn't much wiggle room for adding features but I am eager to hear public opinions, wish lists, wut-i-wudda-duns, etc.