This series LED circuit was found in the February 1992 issue of Radio Electronics magazine. The effect's speed is dependent on C1 and adjusted by R3.
The operational amplifier can be of any type in this circuit, found in a 1974 publication. The...
Found in a 1967 General Electric SCR manual, this circuit triggers in case of excess current,...
With this configuration it is possible to obtain an 80 dB gain from two 741 operational...