This circuit, which can be used as a shield, was found in Radio Electronics from the 90s. The operating circuit can be replaced by a lower voltage equivalent.
For the NOR or no-OR function (negative of the OR function) we take the previous configuration (CB15067E)...
We found this circuit in the October 1996 Electronics Now magazine. The circuit uses LDRs as...
We find this circuit in an American 80's documentation. It makes use of IC sensor which is mounted...