Heater for photo development (CB21390E)

Found in a 1965 General Electric documentation, this circuit is intended to control a 150 W lamp used as a heating element for developing photos.

| Clique na imagem para ampliar |

Wien Bridge Oscillator (CB9040E)
This circuit has a frequency range of 30 Hz to 100 kHz with an output signal of 1 Vrms. We found...
AC Phototransistor (CIR812E)
This circuit is suggested by the Optoelectronics Sourcebook by Texas Instruments when AC signals...
Traffic Light (CB21013E)
This sequential relay actuation system circuit for traffic lights was found in Electronics Now...