rtr12 posted:...And if I am reading the description correctly they even have the jumpers for CA or CC operation built in.
Not sure that module has both CA vs. CC mode built-in. One bullet (shown above) suggests the LED output mode is "Common anode". There are two 2-pin shunts with a resistor next to it. My guess is that resistor is in series with the common anode. Installing the shunt shorts the resistor thereby passing full voltage to the lamps. To use LEDs, remove the shunt and the resistor limits current to LEDs. "Common anode" suggests those FETs are of the N-channel ilk.
rtr12 posted:...Did you by chance see the one that works on 120vac and can handle 500 watts?
From the photo, I'm guessing they are using 3 triacs (one per color) preceded by 3 opto-isolators to switch AC quietly (vs. clicking relays). If you needed to do this, attach a solid-state-relay (SSR) module to your output. An SSR is essentially an integrated opto-isolator and triac. Note the modules have screw-terminals on input and output so you don't need to fire up the soldering iron. Perhaps not quite as economical as the $1/relay modules but they would be quiet. You'd have to select an SSR with suitable power handling capability.
