How To: Use a Triac in LTspice
January 1, 2020 | 13:00
LTspice is a great and free circuit simulator that allows you to do a lot of things. However, simulating a triac or diac circuit can be a challenge as these parts do not work straight out of the box. This video shows you how to get the job done. It also gives some background information on triacs and how to experiment with them in LTspice.
is an acronym for tri
ode for a
urrent. It is a semiconductor device belonging to the family of thyristors and silicon-controlled rectifiers better known as SCRs. Unlike a thyristor that only conducts current in one direction, a triac conducts current in two directions. Triacs are often found in AC switches and controllers like motor drivers, heater controllers and light dimmers.
tend to be used in mains-connected systems, playing with them can be dangerous. Also, measuring signals in triac circuits is not easy and requires special, expensive oscilloscope probes. A circuit simulator like LTspice can be a good alternative.
In this video we first give some background information on the triac and then we explain how to configure the popular simulator for a triac circuit. After watching the video, you will know how to play with dangerous circuits without electrocuting or ruining yourself.