This circuit is from a 1992 publication and is based on CMOS technology. The circuit is powered by a 6 V source and the displays are of common cathode.
We found this circuit in an American documentation from 1977. In it we have the way to use an...
This circuit is from a 1986 Revista Española de Electrónica. It consists of an amplifier with...
This circuit, which uses a planar silicon sensor, is from a 1964 Electronic Design. The component...