Friday, 29 July 2016

Make Electronics Experiment 18: Reaction Timer 



For anyone attempting this, I'd advise reading the errata on the website first: don't connect pins 4 & 5 of the 4026's to ground and swap the R10 1k resistors for for 10k.   The 1uF capacitor should be 0.1uF etc.  Also, to get mine to reliably work I had to remove the the positive pin connection on IC1 pin 16.

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