Propeller ASC Board Vin advice.

Shawna

Hey guys,
I bought the propeller ASC Board. The overview page says Vin can be 6-9 Vdc. The shield I want to attach to it needs 12 volts DC to fire relays. Do you guys think I can run 12 VDC to Vin on the ASC board. It looks like the regulator is good for 20 volts input.

I want to try it but I don't want to blow up my 50 dollar board.

http://www.parallax.com/product/32214

Thanks
Shawn

JonnyMac

I do it all the time -- but that's me. I live on the edge.

The 5v regulator (L1117-5) may get a little warm, but 12v is within its input spec.

kwinn

Very unlikely that you will damage the board, but as JonnyMac says the regulator may overheat. Sometimes they shut down/turn on several times a second causing weird behavior. Even this is not likely unless you are drawing fairly high current from the +5V regulator on the ASC board.

Shawna

Thanks guys I will give it a try.

WBA Consulting

Martin's wiki page for the Propeller ASC states 6-12 volts for Vin. My only concern would be how much current you will be pulling. The greater the voltage drop the 5v reg has to endure will equate to heat proportional to the current draw. If you need a lot of current out of the 5v reg, expect it to run hot, which could reduce its lifespan. http://mghdesigns.com/wiki/asc:start

Edit: left this post as a draft for too long, so others beat me to the answer. I did start typing when no replies were posted, lol

Shawna

I have been running it at 12 volts for about the last hour. The regulator is not getting warm at all. I'm not really doing anything with it, just debugging my remote IO shield. I think it will be ok.


Thanks again guys
Shawn