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Title
Low Noise Preamplifier (CB4596E)
NAND Function with the LM3900 (CB4508E)
Circuit For Fluorescent Lamp (CB4474E)
Unijunction Oscillator (CB4431E)
Car Alarm (CB4412E)
Phase Shift Oscillator (CB4373E)
Metal Detector (CB4336E)
Varicap Variable Frequency Oscillator (CB4587E)
Transistor Hartley Oscillator (CB4576E)
Solar Watch with the 2N3055 (CB4580E)
Experimental Solar Cell (CB4421E)
Simple MW Radio 2 (CB4360E)
Shadow Relay (CB4337E)
3 to 35 V with 4 A power supply (CB4332E)
1.8 W Push Pull Stage (CB4282E)
85 mA Output Operational Amplifier (CB4549E)
Headphone Amplifier (CB4518E)
American Siren (CB4468E)
Electronic Thermometer (CB4306E)
Multi-Pass Filter with Multiple Feedback MC1776 (CB4499E)
Band Pass Filter with Multiple Feedback LM158 (CB4482E)
1 Preseted Counter (CB4382E)
Electronic Bait (CB4568E)
Continuity Test LM3909N (CB4557E)
40 and 80 Minute Timer (CB4538E)
12V To 6 or 9V Reducer For Car (CB4441E)
Video Generator (CB4449E)
LT1037 Sinusoidal Oscillator (CB4396E)
Broadcasting band amplifier (CB8404E)
Simple MW Radio (CB4359E)

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Circuit Bench

  • Old Push Pull Low Power Amplifier (CB12923E)

      The critical components for this 1970s project are transformers. The original transistors are made...

  • In use telephone indicator (CB8657E)

          Found in a 90s Popular Electronics, this circuit keeps an LED on when a phone is in use. Can be...

  • CMOS Frequency Meter Up to 12 MHz (CB13726E)

      We found this frequency meter circuit in a 1974 documentation. The circuit is powered by 12 V and...

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