This circuit was found in a 1968 Motorola documentation. The circuit can be implemented with virtually any photo transistor and general-purpose transistor.
This circuit activates an incandescent lamp at dusk and goes out at dawn. The sensor is an LDR and...
We found this circuit in a Philips documentation from 1969. It makes use of transistors of the...
This high input impedance tone control circuit was found in American documentation from the 1980s....