Building a sound-activated camera flash using a Picture-Axe

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Let’s Make Robots user Rob “renkku” Re is getting some pretty good results from his sound-activated camera flash system, called the Picture-Axe. Built around a Picaxe microcontroller, it has a sound detection circuit and a silicon controller rectifier (SCR) to drive a flash directly. The microcontroller can be used to adjust sensitivity and flash delay.

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High-Speed Photography Kit Version 4

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