Wanted TEC Controller designs 24-60VDC

**mixedgas** · 11-17-2008, 18:38

the toaster oven thing works

origionally published in circuit cellar

just get a pid controller and a ssr IE solid state relay.
Steve

**frank_1257** · 11-17-2008, 19:24

Seems like even with this controllers ability to use some math to predict and overcome oscillation overshoot etc. That the peltiers would be going through some unwanted fluctuations.

Seems that what melcor did was to build a Pulse Width Modulated drive board that was controlled by this very type panel mount pid controller.

I have an 800 watt thermoelectric unit that controls water to some industrial equipment it also uses one of these pid panelmount controls. I just need the interface circuit between the power supply this and my peltiers the 800watt unit has a long row of mosfets used to drive the milspec connector connected bank of peltiers.

Originally Posted by mixedgas

the toaster oven thing works

origionally published in circuit cellar

just get a pid controller and a ssr IE solid state relay.
Steve

**frank_1257** · 11-17-2008, 19:49

12 bit controller problem is cost nearly $200
http://signalllc.com/products/Si24Hy...B-50V-20A.html

**mixedgas** · 11-17-2008, 19:51

you can get PIDs with PWM output and 0-5 outputs, no problem at all.

nice thing about the PIDs, displays! Diagnostics! and .1' or better resolution.

Steve