This circuit was found in an Electronics Now from the 90's. See the previous article for the assembly of the detector head.
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...