What power adapter to use?

[fromar]

Hi All,

I assembled my osPID, but I didn't realize it wasn't going to come with a power cord. What kind of power should I use?

I saw on the unmaintained blog that he purchased a "12V, Positive Center, A/C Adapter". Is that for the box itself?
http://www.unmaintained.com/index.php/o ... -a-budget/

-Omar

[rocketscream]

Omar,

You can use an AC-DC adapter with voltage range 7-38VDC center positive. The on-board regulator will regulate them to 5V. We'll engrave some marking on the back panel in future batch.

[fromar]

Thanks for the reply! I plugged the box into an adjustable voltage plug I have and set it at 12 volts. The box powers, lights blink, the LCD menu shows up, and the relay clicks on and off every few seconds. I can only assume it's working.

[gilroy]

I will try as you suggest, and unplug the osPID from the ssr to see if there is any difference.
With regard to the inherent physics:
I have a small popcorn air popper that I am using to roast coffee. This consists of a nichrome wire element at 240V and a small electric fan. I have wired the ssr into the active wire to the nichrome element - the fan is in parallel.