Found in the 1976 Siemens transistors manual, this circuit works with AM or FM IF signals. In the diagram information is given for the coils.
The sensor for this light relay found in a 1967 Japanese magazine is a common photocell. The...
This circuit was found in an Electronics Now from the 80's. The circuit is designed for 3-digit...
We found this circuit in an old documentation. What it does is flash two LEDs when night falls or when...