This circuit generates pulses whose frequency depends on C1. The circuit can be powered by voltages from 5 to 15 V. We find this configuration in a Signetics manual.
This circuit for measuring very low currents was found in an American documentation from the...
The charging current of this circuit is controlled by the temperature of the accumulators, which is...
This circuit was obtained from old documentation and has a very simple 6 or 12 V configuration...