• Qamar Ul Islam
• Farhad Ilahi Bakhsh

Mostly the TRIAC is used in phase angle controllers. In phase angle control, a gate pulse is applied to the gate terminal of TRIAC between one zero crossing to the next zero crossing. Without the gate pulse the TRIAC is OFF and no current flows through it. When the gate signal is given to the TRIAC it turns ON and the voltage is supplied to the load. In the paper, firing pulses for TRIAC have been generated using microcontroller. The microcontroller used is PIC 16F877A. Depending upon the delay time between the zero-crossing and the applied gate pulse to the TRIAC, the load voltage is controlled. Hence, the power flow to the load is controlled by delaying the firing angle of the TRIAC.

Firing pulse, TRIAC, PIC 16F877A microcontroller, MPLAB SIM software, opto-isolator (MOC 3021), zero crossing, phase angle control.

"Generation of firing pulse for TRIAC using PIC 16F877A Microcontroller", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.9-11, May-2019, Available :http://www.jetir.org/papers/JETIRBM06002.pdf

"Generation of firing pulse for TRIAC using PIC 16F877A Microcontroller", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp9-11, May-2019, Available at : http://www.jetir.org/papers/JETIRBM06002.pdf