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Archives for Test equipment

Range Meter Circuit

Radio Frequency Meter – Range Meter Circuit Schematic diagram of the signal strength meter – Range Meter Circuit using 1N4148

Guitar Amplifiers

100W Guitar Amplifiers using BD139, MJ11016, MJ11015 100W Guitar Amplifiers circuit using BD139, MJ11016, MJ11015 R1     6K8    1W Resistor R2,R4  470R   1/4W Resistors R3     2K   1/2W Trimmer Cermet R5,R6  4K7  1/2W Resistors R7     220R   1/2W Resistor R8     2K2  1/2W Resistor R9     50K   1/2W Trimmer Cermet R10    68K   1/4W Resistor R11,R12R47   4W Wirewound Resistors C1,C2,C4,C5 47µF   […]

3v Touch Switch Circuit diagram

3v Touch Switch Circuit diagram using 4013B, ZVNL110A, B5138

Create HFE Tester Circuit Diagram

Create HFE Tester Circuit Diagram using BC560, TIP142 Create HFE Tester Circuit Diagram

6v – 12v simple inverter circuit diagram

6v – 12v simple inverter circuit diagram using NE555 and TIP41, 42, 2N3904

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