I am planning to develop a PCB, which needs to control power (24V AC 2A(MAX) and 240V 5(MAX)). The applicance will be 24VAC solenoids and 240V FANS/Motors.
Instead of using relays, I would like to try to use a Triac circuit. I aim to place about 8 triacs.
Would like to have some advice from anyone who has some experience.
The device needs to controlled by GPIO either from AVR or buffer IC, but from my understanding a Zero Cross might need to be also implemented.
If I am correct Zero Crossing is only required if you aim to create some type of dimmer switch? I have seen some some Triac Drivers come with Zero Cross and others do not.
Can Triacs be used for DC controlling?
What is the heat dispatation like from a Triac, in comparsion to a relay?