This old indicator circuit indicates only when the fuel reaches the sensor level. The integrated circuit is not common today. The circuit was found in documentation from the 1980s.
Found in a 1967 Electronic Design, this circuit can detect pulses as narrow as 0.2 us. Active...
We found this circuit in the May 1970 issue of Radio Electronics magazine. The maximum frequency...
This flasher was found in the September 1984 Radio Electronics magazine. The frequency is given by...