For my first project they tasked me with reproducing the rather excellent 555-timer “Whack-a-Mole” game created by Jim Chen.
This one was tough… oh yes… very tough.
Eventually I had to abandon the idea of reproducing it on a breadboard like Jim – it soon became clear that it was going to be impossible to convey to anyone else how to do it, so I needed to try another approach.
I decided to recreate the design as a double-sided PCB – etched at home using a couple of single sided boards and some Ferric Chloride.
This worked out, but Radio Shack had one trick left up its sleeve – the PNP transistors that came in the multipack were *backwards* to the standard PNP footprint. Of course, I only realised it *after* I’d added them to the board.
But after I fixed that it worked! Yay!
…and here’s a video to prove it:
If you’re up to the challenge – the full instructions are over on MAKE : Projects –
More projects to come…