Alexander Shabarshin is designing of inexpensive boards to teach basic digital electronics like logic gates, flip-flops and registers:
Educational TTL
Alexander created a Four 4 NAND Gate board with a 7400 chip in SOIC package mounted on the bottom:
He is now trying a different approach that eliminates the need for a breadboard:
Follow the project on Hackaday.io for further updates!
OSH Park 