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Make an LED flash in a crazy way! An idea from @theelectronicschannel
My very first effort at the KZbin thing so please be kind.
The audio ticking throughout the video is from a Chinese diesel heater BTW sorry about that, but its cold this time of year.
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The blades of the Helicopter break a slot sensor, which switches a BC547. The BC547 pulses the count input of a 4017 and the LED is flashed from bit 9 of the counter. I dis add a second socket for another 4017 just in case the frequency was too high, but i was happy with one.