This circuit with zener diodes was found in documentation from the 90s. The zener diodes determine the lighting point of the LEDs. The circuit is for 12 V automotive batteries.
We found this circuit in an American documentation from the 60s. The circuit can be made with...
This simple circuit uses few common components and can be installed in any car. In case of...
This amplifier step with a transistor has an input impedance of 100k to 10 M. The transistor can be any...