Photosensitive power circuit (CB25193E)

This circuit can be used in alarms by activating a relay or a current load that depends on the transistor used. Sensitivity adjustment is made in R3.

Infrared Remote Speaker (CB4898E)
This 80's circuit uses an integrated amplifier of the era, but nothing prevents it from being...
Horizontal Bar TV Generator (CB524E)
This circuit produces horizontal lines or bars in a analog TV tuned between channels 2 and 5. L1...
Dalayed Turn-On Gate (CB123E)
This circuit can be used to add a delay to a logic signal as shown by the input and output...