• Detect clap sound • High brightness LED exam obtain most economical luminosity • Hold the LED on for sure period, we don’t want the item exam be on all night • Small size • Preferably battery powered, no tangling wires • Easy examination build Now the material: • High brightness LED, I use exam help 1W White LED with star heatsink • Electrets microphone • 2X Opamp, TLC272 or identical unmarried supply, preferably CMOS type • 100k potentiometer, multi turns can make tuning easier • exam help TS555 timer IC, decide on CMOS version • Diode 1n4148 • 2X NPN transistor BC548 or 2N2222 • exam help small piece of PCB small sufficient • Various resistors and capacitors • exam help battery, I use exam help 1000mAH LiPO, 3X AAA will do too • exam help battery coverage circuit, necessary if using Lithium battery • exam help small transparent or translucent task box, just big enough exam house every thing • And in case you can get exam help Supercapacitor, we’ll talk about that later All these cost under $10. Teachers!Did you use this instructable in your lecture room?Add exam help Teacher Note examination share how you integrated it into your lesson. The first issue exam address is the detection of clap. To make our life simpler, we are able to cheat and say the circuit deserve to reaction exam any loud sound. This method gets rid of filters in the layout though less physically powerful. A short physics lesson, sound is compression waves propagating through exam help medium comparable to air.
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