Nicolas Collins – My Saviour!

After much head scratching about how I was going to connect the two Science Fair Microcomputer Trainers together, I came across the perfect solution while browsing through my copy of Nicolas Collins’ Handmade Electronic Music: an LED and a photoresistor nuzzled together and enclosed in heat shrink tubing! When the LED is triggered by one of the Trainers, the photoresistor acts as a switch and triggers the keypad on the other…


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