Stephen Woodward’s DI, “Flip ON Flop OFF” does an exquisite job for DC voltages. I considered extending this concept to much-needed AC voltages, as all our devices work with AC voltages.
Wow the engineering world along with your distinctive design: Design Concepts Submission Information
Determine 1 reveals the compact circuitry utilizing a easy counter IC. This circuit makes use of a single push-button (PB) to change between ON and OFF states for AC voltages. Whenever you push PB as soon as, the output terminal J2 will get 230V/110V AC. For the subsequent push, output at J2 turns into zero. This motion continues for subsequent pushes. Accordingly, the gadget related to J2 will likely be ON or OFF.
Determine 1 Pushbutton circuit that switches on ON and OFF for AC voltages utilizing electromechanical relay (RL1).
In Determine 1’s circuit, when PB is momentarily pushed as soon as, U1’s(counter 4024) Q1 goes HIGH, counting one enter pulse, which makes the Darlington pair Q1 and Q2 conduct. Relay RL1 will get energized. Its NO contact closes and passes 230V/110V AC related to J1 to J2. The gadget related to J2 turns ON.
Whenever you push PB once more, the second pulse is generated and counted by U1. It’s Q1 (LSB of counter) turns into LOW, making Q1 and Q2 OFF. The relay will get de-energized, and the AC voltage to J2 will get disconnected, making the gadget flip off. R2 and C2 are for the power-on reset of U1.
Should you favor to not use an electromechanical relay, a solid-state relay can be utilized, as proven in Determine 2. On this circuit, once you push PB as soon as, the Q1, Q2 pair begins conducting, present flows via the LED of U3, an optically coupled TRIAC, inflicting it to conduct. On account of this, U4 TRIAC conducts, passing 230V/110V to J2. Whenever you push PB once more, the Q1, Q2 pair opens, stopping present circulation via the LED of U3. The TRIACs of U3 and U4 cease conducting, disconnecting energy to J2.
Determine 2 Circuit switches AC energy on and off for output-connected devices utilizing a solid-state relay shaped by U3 and U4.
Jayapal Ramalingam has over three many years of expertise in designing electronics methods for energy & course of industries and is presently a contract automation advisor.
Associated Content material
- Flip ON Flop OFF
- To press ON or maintain OFF? This does each for AC voltages
- Embellishments of yet one more Flip-On Flop-Off circuit
- Flip ON flop OFF with out a flip/flop
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