More minimodules

A project log for Yet Another (Discrete) Clock

I HAD to finally do this basic "exercice de style" in digital electronics, using some hundreds of transistors and diodes...

yann-guidon-ygdesYann Guidon / YGDES 12/15/2016 at 18:510 Comments

Hopefully, I'll have a first system in June 2017. I hope to build it with the kids of CercleJ, where I teach electronics to teens.

The subject of this log is : let's also design square-inch sized modules that perform boolean logic, like "discrete gates", but instead of just soldering a LS/HC chip, I simply put BS170/BS250. I imagine the following gates :

This would let the kids play with logic circuits they have built themselves, instead of using a "ready made black box". We could play with the counters and all their configurations, for example.

Note that all the circuits provide both positive and negative levels, both for "practical" reasons and for directly driving the 10TFF modules.