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 have here an interesting audio preamplifier, which can be useful to those who are looking to...
We found this receiver in old documentation. The transistor is made of germanium and the...
When a model train crosses a level crossing, interrupting the light on the sensor, this circuit...