This circuit was obtained from an 80's Electronic Engineering. The circuit detects ice formation by triggering a warning light. The operational amplifier is of the time.
The Buck-type DC-DC converter (voltage lowerer) shown in figure 11 is suggested by Analog Devices...
This circuit, which appears in other versions on this website, was obtained in old documentation. The load...
This circuit is from an Electronic Design from the 90's. The main integrated circuit is uncommon...