Tag Archive: PCB

Jul 23

Simple Transistor-Buffered LED Bar VU Display Indicator

Parts List Resistor : R1,R2 …………………………….. 100 R3,R5,R7,R9 ……………………. 5K6 R11,R13,R15 …………………….. 5K6 R4,R6,R8,R10 …………………… 150 R12,R14,R16 …………………….. 150 Variable Resistor : VR1 …………………………………. 1K Capacitor : C1,C2 ………………………… 220uF Diode : D1,D2 ……………………… 1N 4002 D3,—-D9 ………………….. 1N 4148 D10,—D16 …………………….. LED Transistor : TR1,—TR7 ……………… FCS 9014

Jul 10

Three Transistors DC 3-Way Electronic Sign Flasher

Parts List Resistor : R1,R2,R3 ……………………………. 150 Variable Resistor : VR1,VR2,VR3 ………………………. 1K Capacitor : C1,C2,C3 ………………….. 100uF/16V Diode : D1,D2,D3 ………………………. 1N4002 Transistor : TR1,TR2,TR3 ……………………. B512  

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