Homebuilt TTL and transistor CPUs

Thu Jan 5 00:22:20 CST 2006

On 1/4/2006 at 8:14 PM Peter C. Wallace wrote:

>Neon bulb logic?

Kind of neat in that the logic state is visible.  Hard to use for anything
more than simple circuits--aging and uniformity are real problems.  I built
a couple of ring counters using them though. 

Why not Shockley diodes?  Anyone remember the Shockley demo of a diode-only
audio amplifier back in the 60's?

>Tunnel Diode logic?

Still got about a dozen of those things in my hellbox.

Cheers,
Chuck