Found in Electronics Now this circuit is indicated for operation at the output of audio amplifiers. The circuit is powered by 12 V from the amplifier itself or from another source.
This circuit was found in an old Electronic Design. It makes use of sidacs and operational not very...
This 2009 circuit is a bilateral call warning. Easy to build, using light communication between two...
This circuit for shunt motors was found in an American 1980s documentation. The SCR should be rated...