STC 1000 "Ebay" Temperature Controller Build

stever1000 said:

I got sent the wrong controller. I now have a 12V STC-1000 china clone.
Is there any easy way to use the 12V controller?

Click to expand...

Many uses:

• Control fermentation temps in your car or boat.
• Monitor and control temps inside your computer.
• Temp readouts and control on low voltage hobby and home projects.

More seriously, it can be run/operated from a 120V to 12V/1A adapter (wall wart). The relays can then actuate 120V to 240V circuitry, such as a fridge or freezer.

stever1000 said:

I got sent the wrong controller. I now have a 12V STC-1000 china clone.
Is there any easy way to use the 12V controller?

Click to expand...

yes, you just need to add a 12v power supply to power the stc1000... any 12v wall wort charger will work since it has a very low power draw...
It will still work to switch AC components on and off just fine.

ok I will go to wal-mart and look for a voltage converter
thanks!

Ok guys, so I have the same problem but inverted. I have a 120V stc-1000 and need to control a 9V or 12V solenoid valve. Would the 120v version burn the solenoid electronics?

Also, on the one above me, I don't understand how the 12v version can switch 120v AC components such as a fridge if you're only powering it with 12V.

Edit: saw a diagram and now I understand everything. There's 2 power inputs, one for powering the stc and the other one for the device you want.

chapusin said:

Ok guys, so I have the same problem but inverted. I have a 120V stc-1000 and need to control a 9V or 12V solenoid valve. Would the 120v version burn the solenoid electronics?

Also, on the one above me, I don't understand how the 12v version can switch 120v AC components such as a fridge if you're only powering it with 12V.

Edit: saw a diagram and now I understand everything. There's 2 power inputs, one for powering the stc and the other one for the device you want.

Click to expand...

Not quite, the relays don't power anything. They close/open 2 independent circuits. You could put any load on those, within the relays' specs of course, typically 120/240V, up to 10A. Hence they can also switch your low voltage solenoids (9-12V) at a maximum of the same 10A. Just make sure to wire it correctly.

A 120V STC, as is, needs 120V to operate, unless you bypass the transformer/rectifier, and feed it directly with low voltage DC. Not sure what the operating voltage is, though.

chapusin said:

Ok guys, so I have the same problem but inverted. I have a 120V stc-1000 and need to control a 9V or 12V solenoid valve. Would the 120v version burn the solenoid electronics?

Also, on the one above me, I don't understand how the 12v version can switch 120v AC components such as a fridge if you're only powering it with 12V.

Edit: saw a diagram and now I understand everything. There's 2 power inputs, one for powering the stc and the other one for the device you want.

Click to expand...

What you're looking for is in this thread
https://www.homebrewtalk.com/showthread.php?t=487104

Posted this question in the BrewsBySmith thread, but thought it might get answered here better.

He sells his unit with an option for an LED indicating if heat or cold is being applied. Doesn't the STC-1000 already indicate this with its own built-in LED's?

Yes, the STC-1000 display has Heat and Cool LEDs...

Cheers!

Can't the LED'S be wired so if something like a heat belt fails it will not light? I think the STC display will show what it is trying to do even if the circuit has failed.

Sure, you could add LEDs to monitor the relay coils, or even the switched AC, given enough components.
You could even determine if there was an actual load on each switched AC leg and use that status to light a corresponding LED...

Cheers!

**
Following.

Would like to purchase this for cheap off eBay/Amazon

I have a deep freeze I would like to convert to a 17° lager fermenter. I'm sure if I look through the thread I can see all the Q's and A's I'll need to convert it.

SippinSudz said:

**
Following.

Would like to purchase this for cheap off eBay/Amazon

I have a deep freeze I would like to convert to a 17° lager fermenter. I'm sure if I look through the thread I can see all the Q's and A's I'll need to convert it.

Click to expand...

Just wire the STC-1000 in some kind of box with outlets, and then plug the freezer cord into the cooling outlet.

Brew on

I see the "box" someone has built back a few pages. I'm gonna have to figure out wtf all the mumbo jumbo electrical talk means

Has anyone had an issue with their controllers suddenly losing the ability to switch power? I suddenly had both heating and cooling get stuck ON. Connections still look fine and it's not like I've had the switch in the chamber with too much moisture.

With a deep freezer, it quickly overwhelmed my heater bringing my chamber down well below freezing. Frozen beer anyone?