This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
In applications where there is no danger of any contact with live points on the circuit by the...
This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and...
We find this circuit in a 1970 publication. Transistors can be replaced by current equivalents and LDR is...