This low power circuit was obtained from an American 80's documentation. The circuit indicates the voltage of a battery being trimmed by the trigger point. The transistors can be the BC549.
This circuit consists in a capacitor bridge for capacitance measurements. The circuit can be...
This timer circuit was found in a 1980s documentation. The integrated circuit is the 555, which...
The circuit of this power supply was obtained in an American publication of 1982. We changed some...