We found this symmetrical regulator in a documentation from the 70s. The circuit uses components from that time, which are difficult to find today.
The transistors of this amplifier for headphones with 8 to 200-ohm impedance can be BC548 or...
This circuit can be used in traffic alarm systems. The relay trips when the light falling on the...
The frequency of the signal produced by this oscillator depends on the amount of light falling...