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Full-duplex Intercom PCB for your office and house

P1____    22K  Log. Potentiometer R1___     22K  1/4W Resistor R2,R3____ 100K  1/4W Resistors R4___     47K  1/4W Resistor R5_____   2K2 1/4W Resistor (See Notes) R6_____   6K8 1/4W Resistor R7________22K  1/2W Carbon or Cermet Trimmer R8_______ 2K7 1/4W Resistor C1,C6_____100nF  63V Polyester or Ceramic Capacitors C2,C3___ _10µF  63V Electrolytic Capacitors C4________22µF  25V Electrolytic Capacitor C5________22nF  63V Polyester or Ceramic Capacitor C7________470µF  25V Electrolytic Capacitor Q1_________BC547  45V 100mA NPN Transistor IC1________TDA7052  Audio power [...]
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Circuit Diagram 15W EL84 Power Amp and a Transformer power supply Schematic

Circuit Diagram 15W EL84 Power Amp and a Transformer power supply Schematic Circuit Diagram 15W EL84 Power Amp and a Transformer power supply Schematic
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FM Radio Receiver circuit diagram using TDA7021T

FM Radio Receiver circuit diagram using TDA7021T Parts List: R1 = 8kO2 R2 = 10kO R3 = 390O C1,C3 = 10nF C2,C6,C9,C16 = 100nF C4 = 33pF C5 = 25pF trimmer (Murata type TZB4Z250AB10R00) C7,C10 = 1nF5 C8 = 820pF C11 = 1nF C12 = 68pF C13 = 220pF C14 = 47µF 10V (Nichicon UWX1A470MCL1GB 5.5mmL chip type) C15 = 3nF3 L1 = 36nH (4 turns 0.5mm silver-plated wire, inside diameter [...]
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Making Light Dimmer Using remot

Making Light Dimmer Using remot
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