Archive for June 21st, 2013
I intend to use solid-state relays to control things like extruder and platform heaters, so I wired a Fotek SSR-10 DD to the same output bit as the First Light test, with a random 12 V SLA battery providing power for the LED strip:
Nothing groundbreaking, but it’s always nice to confirm these things.
Note that the SSR must have a DC output, not the more common AC output, to control DC power. In effect, a DC-DC SSR is just an up-armored power FET with an optically isolated gate terminal.
Dan reports that the Fotek SSRs have just about exactly the internal build quality you’d expect for a cheap product from halfway around the planet. Although the specs would have you believe they operate from a 5 VDC source, that may not be the case. The 7i76 output pins switch the +24 VDC field power to the SSR, so it’s firmly turned on.