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Digitally Adjustable Dancing Lights

Digitally Adjustable Dancing Lights

+78362154IC3555GNDVccRO/P31418IC2CD40669101267114Z0VccE2E3GND513E0E12Y3Y2Y1Y0Z1Z2Z315101413816IC1CD40177423R101K+AS1PUSH-TOON SWITCHR1470ΩR31MC20.1μC14.7μ25VR22.2KR4470ΩC34.7μ25VC40.01μLED212VBATT.S1ON/OFFSWITCHLED1R91KR55.6KR6, 10KR111KR7, 22KR8, 33KDigitally Adjustable Dancing Lights
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publish time: 2020-10-23
Circuit Everyday

You may have encountered several types of adjustable dance lights (flashing leds).Most of them use preset (variable resistors) to adjust switching rates.As mechanical components, presets tend to wear out with use and introduce noise into the circuit.The circuit described here USES a timer IC 555 to select different resistance values to control the frequency of an unstable multivibrator.

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