PWMSlope Behavior

Related to the development libraries, released by Curt Binder
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NanoTrevor
Posts: 69
Joined: Thu Jun 02, 2011 1:58 pm

Re: PWMSlope Behavior

Post by NanoTrevor »

rimai wrote:Sorry Trevor...
I've been reading lots of places that people just have these problems with the buckpucks. Not just you.
The solution always seems to be optoisolation, like we've been working on.
But, there was a couple of places where they mention connecting the Vin- to ground, instead of LED- to ground.
I don't know if that would make any difference on the whole issue, but it would be worth trying.
i actually tried that on another arduino based controller i had tried and it didn't work connecting to vin - instead of led -
icecool2
Posts: 62
Joined: Tue Jul 19, 2011 3:12 pm

Re: PWMSlope Behavior

Post by icecool2 »

Sorry, I don't have a schematic handy. I have a current limiting resistor on the signal line from the RA to the driver. On the driver side, I have the digital ground separated from the analog ground and joined with a small bridge. There is also a weak pull up on the driver as well. I have the GND from the RA run to the digital ground of the drivers. The analog grounds are connected on the AC side between the RA and the power supplies for my drivers.
NirvanaandTool
Posts: 3
Joined: Thu Aug 04, 2011 7:42 am
Location: Philadelphia Burbs
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Re: PWMSlope Behavior

Post by NirvanaandTool »

Yikes. Sounds like problems all over.
Maybe I'll skip trying to get the Buckpucks to run off the PWM and get some RA moonlights instead.
-Ralph
DVRC's Mantis Shrimp Addict
15g display/7.5g sump - G. Chiragra & G. Viridis | 35g build in progress - future O. Scyllarus
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