Simple PID heat & timer

[Rod True]

Here's a rather simple PID controller that I set up over the past few days.

Here are the components:

Auber Instruments SWA-2442C - 1/16 DIN PID Process Controller w/ Timer & Alarm This controller has 10A relay contacts, most blankets run 5-8A so no solid state relay is required.

Auber Instruments TC-K5 - k Type Thermocouple, Bare
International shipping to Canada was $12 US

PID-1.jpg (30.44 KiB) Viewed 1190 times

PID-2.jpg (30.51 KiB) Viewed 1190 times

PID-3.jpg (28.93 KiB) Viewed 1190 times

The on/off switch is just a basic house switch.
The single plug I pulled off the non-working router speed controller I got years ago from John Hall, so is the power cable.

Here's the schematic I used, thanks to Dave Fifield

schematic.jpg (43.86 KiB) Viewed 1190 times

You'll notice in my actual wiring job that I jumped post 11 & 12. This needs to happen in order for the timer to be enabled.

Total cost to me was under $100 CAN. Took about 2 hours to fully set up, including slight modification to my bender base. Took another 1.5-2 hours to figure out the "programming".

I like this controller as it controls both the temperature and has the timer built in. Works like a charm!

The rest is pretty easy.

[ken cierp]

Nice circuit Rod thanks for sharing.

Seems these PID's are pretty popular now, this one with the Solid State relay is under $25 probe is about $6

[Rod True]

Ya, I've been wanting better control for temperature for my set up. I had a router speed control that worked decent for many years, however when that packed it in I figure I'd see what's involved with this PID option.

I like that the one I got has the timer built in, although I spent more than I needed on the PID I figure with the built in timer it was one less thing for me to figure out how to wire up :D