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Title
Emergency Pulser (CB4548E)
OR Function with the LM3900 (CB4507E)
Electronic Dice (CB4366E)
LED Binary Counter (CB4345E)
Multi Voltage Source For Walkman (CB4323E)
Power Supply For FM Transmitter (CB4331E)
Digital Capacimeter (CB4312E)
Hartley Oscillator (CB4571E)
Transformerless 12V x 50mA Power Supply (CB4564E)
MW Experimental Radio (CB4517E)
Inverter Amplifier LM308 (CB4490E)
Quail Brooder (CB4467E)
Sequential Different (CB4316E)
Bipolar Transistor Colpitts Oscillator (CB4582E)
Field Strength Meter (CB4521E)
Wien Bridge Oscillator MC1776 (CB4498E)
LM158 Function Generator (CB4481E)
CB4451E ()
LT1056 Astable (CB4395E)
Siren (CB4381E)
Lamp Flasher LM3909N (CB4556E)
Decoder with the 4017 (CB4529E)
Phase Shift Oscillator (CB4537E)
Electronic Micro Organ (CB4440E)
BTL Amplifier TDA2020 (CB4358E)
74123 TTL VCO TTL (CB4574E)
Sustain For Guitar (CB4459E)
Programmed Shower (CB4448E)
Photoelectric Relay (CB4387E)
TV Switch CIR11105S (CB4403E)

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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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