This circuit is from a 1969 RE Experimenters Handbook. The circuit is powered by the voltage of the circuit being tested. Integrated circuits are current.
This circuit was found in the November 1966 issue of Electronics Now magazine. It uses an LDR as a...
In the figure we show how a 2-pole x 2-position switch or HH should be connected to reverse the...
We found this circuit in the March 1980 Radio Electronics magazine. The circuit used is the HA2400...