12W Amplifier (T493E)

This amplifier for playback of recordings was found in a 1947 manual. It uses a push-pull output with a tube power supply.

| Clique na imagem para ampliar |

Photoelectric Flasher (CB1303E)
When the illumination decreases, this multivibrator starts up, causing the lamp to blink at a...
CMOS Zero Crossing Detector (CB20625E)
The operation of this circuit is old, but the configuration can be elaborated based on modern...
Automatic light (CB22105E)
This circuit activates an incandescent lamp when the light stops falling on the sensor. The...