My home thermostat has relays to switch the heat and A/C. They are very loud. Is there any reason why this couldn't have used MOSFETs for the switching?
Many control systems are low-voltage AC, e.g, 24V. My home system is.I'll have to check. While the heat and A/C are AC-powered, I think the switching is low voltage (12V) DC.
I can hear them click from anywhere in the house, even the basement.Those relays are loud?
BTW, according to the spec, they are dual coil latch/unlatching types (LT).
DPDT
Max.
Some EDM sound-damping inside the enclosure might work.I can hear them click from anywhere in the house, even the basement.
Sure but it's not a trivial matter.True, but I'l still like to either replace the relays or build my own thermostat using SSR's.
Those latching relays use pulses to activate and deactivate. Going to get a lot more involved using a SSR.True, but I'l still like to either replace the relays or build my own thermostat using SSR's.
by Jake Hertz
by Jake Hertz
by Duane Benson
by Jake Hertz