Tag Archive: Zener Diode

Jul 27

DC 4V-9V Adjustable Voltage Regulator

DC 4V-9V Regulator-schematic-diagram

  Parts List Resistor : R1,R2 …………………………. 2,2K R3 ………………………………. 15K R4 ………………………………. 22K R5 ………………………………. 10K Variable Resistor : VR1 ………………………………. 2K Capacitor : C1,C2 ………………….. 2,2uF/25V C3 ………………………. 10uF/10V Transistor : TR1,TR2,TR3 …………. FCS 9014D TR4 …………………………… BC 140 Diode : D1 ……………………………… ZD 12V  

Jul 27

RC4739 Stereo Tape Head Playback Pre-Amplifier

Stereo Tape Head Playback Amplifier-schematic-diagram

Parts List Resistor : R1,R101 ……………………………… 5M6 R2,R102 ……………………………. 180K R3,R103,R5 …………………………… 1K R105,R12 ……………………………… 1K R4,R104 ……………………………… 100 R6,R106,R11,R111 ………………….. 4K7 R7,R107 ……………………………… 2M2 R8,R108 ……………………………… 27K R9,R109 ………………………………. 150 R10,R110 …………………………….. 22K R13 …………………………………….. 1M R14 …………………………………….. 82K Variable Resistor : VR1,VR101 ………………………….. 10K Capacitor : C1,C101,C4,C104 ……………… 0,1uF/50V C2,C102 ………………………… 470pF/25V C3,C103 …

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Jul 27

MM5369 60 Hz Time Base X’tal Oscillator

60 Hz Time Base X'tal Oscillator-schematic-diagram

Parts List Resistor : R1 ………………………………. 470 R2,R3 ………………………….. 3K3 R4 …………………… 16M (3x 5M6) Capacitor : C1 ……………………………… 33pF Variable Capacitor : VC1 ……………………………. 30pF Diode : D1 ………………………….. ZD 7,5V Integrated Circuit : IC1 ………………………… MM 5369 Other : X’tal ………………………. 3,579545  

Jul 23

Automatic 12V Battery Charger

Automatic Battery Charger2-schematic-diagram

Parts List Resistor : R1,R4,R7 …………………………. 1K R2 ………………………………… 470 R3,R5 ……………………………. 47K R6 ………………………………… 220 R8 …………………………………… 1 Variable Resistor : VR1 ………………………………. 5K Capacitor : C1 ………………………. 220uF/16V Diode : D1 ……………………………. 1N 5402 D2,D4 ……………………….. 1N 4148 D3 ………………………………… LED D5 ……………………………. ZD 6,2V Transformator : T1 …………………. P  :  0-110V/220V T1 …

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Jul 23

5A 12V Lead Acid Automatic Battery Charger

Automatic Battery Charger-schematic-diagram

Parts List Resistor : R1 …………………………………… 470 R2,R3,R4,R7 ………………………… 1K R5,R6 ……………………………….. 47K R8 ……………………………………. 220 Variable Resistor : VR1 ……………………………………. 5K Capacitor : C1 …………………………….. 100uF/25V Diode : D1,D2 ……………………………. 1N 4148 D3 ……………………………………… LED D4 …………………………………. ZD 6,2V D5,D6,D7,D8 …………………… 1N 4002 D9 …………………………. MDA 3502 – 4 Semiconductor : SCR1,SCR2,SCR3 ……………. EC …

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