Nows a good time to check the arduino is reading the pulses from the Geiger counter...

Geiger counter triggered LED decorations using arduino

Bored of blinky lights that blink in response to time? Make them blink with space instead! This instructable shows a quick method for connecting LED tree decorations to a Geiger counter via arduino, so that the lights blink between different strings each time radiation is detected. It’s nicer to think of this as “cosmic rays” […]

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