SHAOSThis is 1st attempt - board that I created in September 2013, but didn't share it yet - now I do this:
On the front it has an image showing what is that:
and on the back it's 7400 chip in SOIC package with SMD 0.1uF capacitor on power lines:
Four NAND gates for breadboard
A project log for Educational TTL
This is an attempt to create some hardware that may help to learn digital electronics and will be cheap enough
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