Adjustable reference (CB21539E)

This circuit was obtained from an old American publication. The uA702 is a differential amplifier and the diode is a zener.

Simple sound bridge (CB6069E)
This simple bridge circuit can be used for impedance or resistance measurement using a high...
1,000 V Voltage Source (CB522E)
This circuit can source up to 1,000 V from a 9 V battery. Output current is very low, some...
Changing the frequency of the LED blinking (CB24661E)
The figure shows how to change the frequency of a 5 V LED blinking. The capacitor can have other...