Tag Archive: Variable Resistor

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 …

Continue reading »

Jul 27

Amplitude Modulation (AM) Medium Wave (MW) Radio Receiver

Radio MW-schematic-diagram

Parts List Resistor : R1 …………………………….. 100K R2,R3 ……………………………1K5 R4 ………………………………. 470 R5 ………………………………… 10 Variable Resistor : VR1 ……………………………. A 5K Capacitor : C1 ……………………………. 0,01uF C2 ……………………………… 0,1uF C3 ………………………………… 1uF C4 ……………………………. 0,02uF C5 ……………………………. 0,05uF C6,C7 ………………………… 220uF C8 ………………………………. 10uF Variable Capacitor : VC1 ………………………….. 500pF Diode : D1,D2 ……………………… …

Continue reading »

Jul 27

TRX6221 Stereo Graphic Equalizer

Stereo Graphic Equaliser1-schematic-diagram

  Parts List Resistor : R1,R3,R5,R7,R9,R11 ……………………. 470 R13,R15,R17,R19 ……………………….. 470 R101,R103,R105 ………………………… 470 R107,R109,R111 ………………………….470 R113,R115,R117,R119 ………………….. 470 R2,R4,R6,R8,R10,R12 ………………… 470K R14,R16,R18,R20 ……………………… 470K R102,R104,R106 ………………………. 470K R108,R110,R12 …………………………. 470K R114,R116,R118,R120 ………………… 470K R21,R121,R22,R122 …………………… 100K R23,R123,R24,R124 ……………………. 10K R25,R125 …………………………………… 1K R26,R126 …………………………………… 1M R27,R127,R28,R128 …………………….. 330 R29 …………………………………………. 3,9K R30 …………………………………………. 3,3K …

Continue reading »

Jul 24

8W Police Alarm/Sirene

Police Alarm2-schematic-diagram

Parts List Resistor : R1 ……………………………… 2K2 R2 ……………………………… 27k R3 ……………………………… 470 R4 ……………………………… 22K R5 ………………………………. 120 R6,R10 ………………………… 8K2 R7 ……………………………… 3K3 R8 ……………………………….. 1K R9 ……………………………… 4K7 R11 …………………………….. 220 R12,R13 ………………………. 18K R14 ……………………………… 10 Variable Resistor : VR1 ………………………….. 100K VR2.VR3 ……………………….. 2K Capacitor : C1 ………………………… 22uF/10V C2 …

Continue reading »

Older posts «