This circuit appears elsewhere in this section, obtained from other documentation. The circuit is for lead-acid batteries and the lamp can be replaced by high brightness LEDs.
This circuit is suggested by Motorola, making it possible to use an optical coupler of type 4N26...
The idea of this circuit is a resistance meter or continuity test with a common microammeter or...
This circuit, which can act as a shield, is from old documentation, using a DAC of the time. Next to...