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Showing posts with the label Timed

Simple Timed Beeper Circuit Diagram

Hi Everyone Yesterday upon visiting my (somewhat) local optometrist, I was advised to look up every 5 minutes or my eyes will stay  Simple Timed Beeper Circuit Diagram Parts: R1______220R    1/4W Resistor R2_______10M    1/4W Resistor R3________1M    1/4W Resistor R4_______10K    1/4W Resistor R5_______47K    1/4W Resistor   C1_______ 100nF   63V Polyester Capacitor C2________22µ F   25V Electrolytic Capacitor   D1______ 1N4148   75V 150mA Diode D2________3mm.   Red LED   IC1_____ 4081    Quad 2 input AND Gate IC IC2_____4060    14 stage ripple counter and oscillator IC   Q1______BC337   45V 800mA NPN Transistor   P1______SPST Pushbutton (Start) P2______SPST Pushbutton (Reset)   SW1_____4 ways Switch (See notes)   PS______Piezo sounder (incorporating 3KHz oscillator)   B1______3V Battery (2 AA 1.5V Cells in series)   Device purpose: This c...