This circuit, which can act as a shield, was found in a 1990 PE Hobbyst Handbook. The circuit generates logic pulses for different types of applications.
With the first project we present, a relay is activated in the presence of light. We can use it as...
This circuit was found in the September 1984 issue of Radio Electronics magazine. The circuit is...
This preamplifier with 1 CK722 transistor was found in Radio Electronics magazine from May 1959....