Two-tone solar buzzer (CB20493E)

This circuit was found in a 1991 publication. The transistor can be a general-purpose type.

Photo Complementary Detector (CB14633E)
This circuit is from a 1978 optoelectronics manual from Texas Instruments. The transistor can be a...
12 V to 110V or 220V Inverter (CB16837E)
This inverter can reach a power of 300 W depending on the transformer used. In this case, a...
Pulse Generator LM3900 (CB19122E)
This circuit uses an LM3900 transconductance operational amplifier to generate pulses whose...