This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a sensor and has a Bargraph scale with the well-known LM3914.
This circuit was obtained from an old documentation, but as it uses still current components it can be...
This battery charger circuit was found in ancient American documentation. The components are...
This circuit is from a technical documentation from the 70s, and equivalents can be used for...