Pulsed Light Alarm (CB6439E)

This circuit provides a high intensity pulsating signal to a speaker. The circuit is from an American 90's documentation. The power supply is 12 V.

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Ultra High Gain Amplifier (CB4940E)
This setting appears elsewhere in this section. This was obtained from an American 1980s...
PWM Motor Control (CB251E)
This speed control for small DC motors can operate from 6 to 12 V sources. The motors can drain...
Sine to square converter (CB7184E)
We found this circuit in a 1964 Electronic Design. Transistors can be modern general-purpose...