Complementary AC power switching

Posted on May 10, 2012

An input signal of less than 1 mA and 1V is required to switch on CS1. As long as this input -signal is maintained, CS1 will conduct during each positive half cycle of anode voltage, thereby energizing load LI with half-wave rectified dc. L2 remains de-energized, since the anode of CS1 will not go more positive than 1 volts, and voltage divider R2 - R3 cannot provide enough voltage to trigger CS2. Upon removal of the input signal, CS1 will drop out. Ll will be de-energized, except for a small amount of ac current through R2 and R3

Complementary AC power switching
Click here to download the full size of the above Circuit.

CS2 will be triggered on at the beginning of each positive half-cycle, when CSl anode voltage reaches 2 to 3 volts. CS2 will conduct for nearly the entire positive half-cycle energizing L2. It should be noted that the 6 volt lamps used will operate at Wthe rated brilliance because of the controlled switch half-wave rectifying action and will extend the operating lamp life by several orders of magnitude. Should full brilliance be desired, the anode supply voltage level should be raised to 9 volts ac.

Leave Comment

characters left:

New Circuits



Popular Circuits

Current Loop Sensor Interface
Car battery condition checker
universal serial PC interface
Charging time relay circuit 2
Multipurpose tape recorders TV signal generator circuit