We found this circuit in the June 1984 issue of Radio Electronics magazine. The circuit uses an integrated circuit that is not very common today.
This current boosting circuit uses an op-amp and 3 transistors. The current depends on Q1. The...
This circuit, from the ON Semiconductor Thyristor Manual, controls both the speed and direction of...
This circuit was obtained from a Popular Electronics of 1994. The magazine no longer exists in its...