The circuit was designed to be used as flashing eyes in Halloween gadgets with the addition of rhythmic music or speech while being powered by 3 V battery. BC547 – NPN small signal transistors ...
It's the most sought-after decoration for Halloween 2020. A 12-foot tall, 90-pound plastic-and-metal skeleton with battery-powered, blinking LED moving eyes is sold out across the US. The giant ...
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