I have been having a bit of an attic clear out and came across a book that no doubt influenced my choice of career path. I was a huge technical lego fan and had owned a Commodore 64 for a few of years, but it wasn't until I spotted this book in a local toy store that I realized the true power of computers, which to this point had only been used to play games
I built the interface circuit with the help of my CDT teacher during lunch hours at school, also the first PCB I had ever made, I remember it never worked properly, I think one of the relays wouldn't work, so I was limited to 5 outputs instead of 6, but I managed somehow. I also remember the paper-clip switches in the book were practically impossible to make.. at least it seemed that way to a 12/13 year old!
I was mostly interested in the two robot arms in the book, particularly the last 3 axis arm, I did build it but I don't think I ever got the paper-clip switches to work properly
, Still a fantastic book! I have the Spectrum version too.
The gripper at the end of the arm was under tension from an elastic band, it was pretty clever as when the motor wound the string back in, the gripper would close on an object and then lift it with one motor! I thought this was ingenious at the time
Simple enough circuit, but I could never get all of my outputs working.. tempted to find an old C64 and build it all over again