Found in a PE Hobbyst Handbook, this circuit checks if there is voltage in a power outlet by emitting sound and lighting an LED.
This analog TV circuit generates bars in the NTSC standard. We found it in the July 1991 issue of...
In the figure we have the receiver of a sequential remote control operating at a frequency in the range of...
We found this circuit in a French technical documentation from 1982. The circuit can be...