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.
This circuit was found in a RE Experimenter Handbook from the 90's. The components are of the...
This circuit is from an old Mullard (Philips) documentation on the 555. The circuit uses a pair of...
This adjustable oscillator has the traditional configuration already presented in other articles. The...