This 100 second timer was found in the September 1992 issue of Radio Electronics magazine. The circuit has two timing ranges and time adjustment at R6.
This simple circuit was found in Popular Electronics. It can be built with any JFET. Galvanometers from...
This circuit produces a sine 1 kHz signal. The frequency is given by C1, C2 and C3. This is a...
This circuit is interleaved with the source of a portable AM or FM radio previously tuned to a...