USB dew heater control

[Earl]

I have sourced a USB controller for 8 12v ports which can all be controlled from the computer, im now looking for what i can use for dew heaters, are these just potentiometers? are there USB cotrolled potentiometers?

[martin_h]

Dew heater controllers are "usually" PWM controlled so that the voltage (12V) is constant. Using a pot would just vary the voltage.

[Earl]

Dew heater controllers are "usually" PWM controlled so that the voltage (12V) is constant. Using a pot would just vary the voltage.

more like these then?

http://www.ebay.co.uk/itm/UNO-R3-Mega-2560-Pro-Mini-Nano-V3-0-Board-Microcontroller-For-Arduino-Compatible-/201039149335?pt=LH_DefaultDomain_0&var=&hash=item2eceddf917

[Guest]

more like these then?

http://www.ebay.co.uk/itm/UNO-R3-Mega-2560-Pro-Mini-Nano-V3-0-Board-Microcontroller-For-Arduino-Compatible-/201039149335?pt=LH_DefaultDomain_0&var=&hash=item2eceddf917

These are all you need I have just built a power supply unit including these PWM controllers 2 for £6, from ebay they work like a charm

Just open them up and take the insides out, and connect wires to,input and output, fit pot to outside of your own control box.

And this is my project with the dew controllers fitted

[Guest]

Sorry have just re read the post, you wanted USB controlled dew heaters.....these are not.

Olly

[Earl]

Yeah m trying to avoid the clutter of knobs.

[martin_h]

This could possible be pressed into service............ https://www.pc-control.co.uk/ocart/index.php?route=product/product&path=59&product_id=52