4 Channel Thermostat using PID loops

[malc-c]

Well I received 6 PCB's that I had made by PCBWing in Hong Kong, which I must say offer a fantastic quick service even on the "economy" option. I chose the 7 day turn-around, and the boards were received around 12 days after placing the order.

Here's the 1st board, not quite completed, but you can see the quality of the PCB. I'm hoping to get the first "production" unit complete in the next couple of weeks, funds permitting. I've already had people on the reptile forum dropping me PM's with offers to purchase it... - Just need to resolve the coms issue in the firmware first !

[gadelhas]

Excelent Work! Congratulations!

[zachschi]

Great post! It must be cool to have a history showing your project going from start to finish. Just curious, did you end up using the Triacs and Optoisolators for cost, size or both? I have a HV control project and I am considering the difference between the two. Thanks.

[Scampy]

Hi,

Yes I opted for the isolators and triacs for both cost and size.

[shahidali55]

Has the incPID_mc.pbp file been modified?
I can see several commented lines.
Has Henrik posted this file somewhere on the forum?

[Scampy]

As far as I'm aware there was no modifications since the original one posted at the start of the thread. Here's the version I have used in all subsequent builds (change the TXT ext to pbp)

[Scampy]

Thought I should update this thread with some more images of the finished MKII prototype which has been running now for just over a year now without any issues.



From the back, and



From the front.

The RS232 connector on the board is obsolete, and is connected to a panel mounted socket on the rear. I was thinking of adding one of those new 232 > USB TTL cables to make connectivity easier, but to be honest I've only ever needed to adjust the time from GMT to BST and back, which was easy from the unit rather than from the PC, so haven't bothered.