What is difference between SCR and triac?
- What is difference between SCR and triac?
The main difference between SCR and TRIAC is that SCR is a unidirectional device, TRIAC is a bidirectional device. A thyristor is more reliable while TRIAC has less reliable. A thyristor can be triggered by positive gate voltage only, the TRIAC can be triggered either by the positive or negative gate voltage.
- How do you build a solid state relay?
DIY Solid State RelayStep 1: THINGS WE NEED.Step 2: OPTOCOUPLER.Step 3: Add positive pin of led to pin 1 of optocoupler.Step 4: Add 220 Ohm resistor to -ve pin of LED.Step 5: Add jumper to pin 2 of optocoupler which will go to +ve power supply.Step 6: Join source of triac to 4th pin of optocoupler.