Additional Pull Pull (CB6119E)

This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.

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Ice Warning on the Track (CB6046E)
We found this circuit in an 80's Radio Electronics. The circuit uses a PTC sensor and an LED...
Two Transistor Adjustable Siren (CB1484E)
This circuit was published in a 1977 Radio Shack catalog. The PNP transistor may be BD135 and NPN...
Motor Oscillator (CB3975E)
This circuit mimics the sound of a siren when we turn the axis of the small DC motor. The...