Instrumentation Rectifier (CB19750E)

This circuit can make use of almost any operational amplifier and the diodes are for general use. It is intended to excite an analog instrument.

| Clique na imagem para ampliar |

Signal Tracer Injector (CB18458E)
This circuit uses a crystal phone and can be built with more modern transistors like the BC548. The...
Up to 3.5 A DC Motor Control L165 (CB15140E)
The resistors in this circuit marked with * must be within 1% tolerance. The circuit is from the...
1000 second timer (CB23601E)
The existence of field effect transistors at the input of the integrated circuit (operational...