This 2002 documentation circuit is suitable for automotive use. The circuit is based on an integrated that is not common today and has a medium power stage with a BD135.
Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found...
This circuit uses the LM34 sensor for degrees Fahrenheit and has a scale from 3 to 300º F...
This circuit was found in the May 1972 issue of Radio Electronics magazine. The activation code...