This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the polarity of a power supply to obtain a voltage of -5 V.
In the figure we have the way to connect solar cells in series in order to increase their voltage. The...
The sensor in this circuit is an LDR and the potentiometer serves to control the sensitivity...
This circuit is used to match a high impedance input source with a low impedance output device...