This control circuit or reversible contactor was found in a 1967 General Electric manual. The triacs must be in accordance with the power of the controlled load.
This Phase-Shift Oscillator produces sine low frequency signals suitable for many applications. It...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This amplifier became famous in the 1970s, it was sold in kit by Ibrape, Philips subsidiary for...