This circuit, which controls both the temperature and the level of a liquid in a reservoir, was found in an Electronic Design from the 90s. The circuit is based on a double 555.
This circuit was found in an old Popular Electronics. With it we can check the operation of a...
This circuit that drives the load when the logic output is at the low level, was obtained in a...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...