This circuit was found in a Texas Instruments documentation from the 1980s. The circuit monitors engine temperature by warning of engine warm-up and warning when the fan is on.
We found this filter in a documentation for radio amateurs from 1974. The transistors could be the...
The integrated circuit used in this 80's temperature control is not very common today. The load...
Circuits and devices can be tested using the tester. The visual indication of the state of the...