If you are the original author, please access your User Control Panel and update it.
I'm afraid I'm STILL on the Write LMR trip. It's not got tired yet. I've decided to motorise a miniature Etch-A-Sketch. I decided on steppers. Not servos. Servos hadn't enough rotation. Continuous servos had no positional feedback. Here's my prototype circuit. Simple ULN2803 driver and a PIC 16F628. There's a max232 on there, too as the RS-232 interface to the PC. WOW! It draws a circle. The most impressive bit of this is my implementation of Bresenham's line drawing algorithm. The circle is made ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/van-rijn