This 1968 Mullard circuit detects fire by smoke using LDR-type sensors. The circuit makes use of transistors of the time that admit equivalents.
The purpose of this circuit, which we find in an old American documentation, is to allow the...
This low distortion circuit was found in a 1964 Electronic Design. The transistor admits...
This compact power supply can be used on the workbench for up to 1 A load. The transformer has 1 A secondary...