Morse code trainer

Morse-Code Trainer Using Arduino

My kids are learning Morse code this summer, so I threw together this little circuit to help them learn. And to make it more fun… It uses an ATtiny85 ($2.26 at digikey.com) to drive a piezo beeper (โ‰ˆ $3.50 at Radio Shack.) The ATtiny85 takes 5.5V max, so I built the circuit on a piece […]

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