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Forum Index : Electronics : A simple charge controller

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Russell

Newbie

Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 11:15pm 15 Aug 2009
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Just put one of the charge controllers together and having some trouble. As soon as I apply power,the R1 12k frys. It all looks good, no dead shorts or connections crossed. Using 1/4 watt resister, don't know if that is correct or not. thanks for any help.
 
Robb
Senior Member

Joined: 01/08/2007
Location: Australia
Posts: 221
Posted: 12:02am 16 Aug 2009
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What are the colour bands on your '12k' risistor?

 
Russell

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Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 12:07am 16 Aug 2009
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Hi Robb looks like brown,red,black.gold. Thanks
 
Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5078
Posted: 12:43am 16 Aug 2009
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Thats a 12 ohm resistor, not a 12k ohm. It should be brown red orange gold/silver ( the last one is the tollerance )

http://www.thebackshed.com/Windmill/Docs/ElectricComponents. asp

Glenn
The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ
 
Russell

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Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 12:57am 16 Aug 2009
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thanks Glenn I will try it with the wright resistor
 
Robb
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Joined: 01/08/2007
Location: Australia
Posts: 221
Posted: 05:59am 16 Aug 2009
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Ok so what colour is your 3.3k. I'm thinking it must be wrong too to be able to smoke the 12 ohm above it.
 
Russell

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Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 04:54pm 16 Aug 2009
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Yes its wrong to, Got a good lessen in reading color codes on resistor. Going to spent some time tonight swapping out resistor. Bear with me guys,got a lot of good idea's but little slow on the learning curve.
 
timbo
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Joined: 17/08/2009
Location: United States
Posts: 2
Posted: 02:31am 17 Aug 2009
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I'm trying to find the parts to put one of these together (24 volt version) and I have found everything but the DB139. I have tried several searches for it and subs but haven't found it. Everything else I have found at newark.com

Can anyone tell me where to find it? Or a sub I can use?

Thanks
 
Russell

Newbie

Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 03:46am 17 Aug 2009
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Timbo try this place they seen to have everything under the sun. http://www.mouser.com/ And timbo its a BD139 not a DB, I think its a miss print on the veroboard layout. Also the R1 12k on the veroboard layout is marked as a 10k, I think this is correct but Im a Newbie to, maybe some one with more know how got confirm is.
 
Robb
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Joined: 01/08/2007
Location: Australia
Posts: 221
Posted: 01:11pm 17 Aug 2009
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The sections of the opamp are transposed too. 1/4 and 2/4 are swaped on the layout. It dosn't matter apart from creating confusion .
 
timbo
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Joined: 17/08/2009
Location: United States
Posts: 2
Posted: 03:33pm 17 Aug 2009
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Thanks for the help. Now with the correct part # I found everything I need at Newark for about $14.00.

Any idea what kind of power this will handle? From looking at the scematic it looks like the relay needs to be able to handle the power. I hope to get 500W out of my generator so I better be sure I have 40A relay.
 
Russell

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Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 04:45am 18 Aug 2009
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It works! Amazing what happens when you use the right parts. Thanks for the help, next thing is to hook this up to my turbine and start charging batteries.
 
Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5078
Posted: 05:30am 18 Aug 2009
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Hey Russell, happy to hear it. You got to watch those resistor color codes. The 5 band resistors are a real nightmare.

Timbo the output is limited by the relay, your right. The BD139 will drive a typical 12v spot light relay, anthing bigger and you could use a smaller relay to switch a bigger relay.

Glenn
The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ
 
readyakira

Senior Member

Joined: 17/07/2008
Location: United States
Posts: 114
Posted: 05:04pm 20 Aug 2009
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Can ya post the link to the controller info you used? It sounds like a relativly simple circuit you designed...
Don't you think Free/Renewable energy should be mandatory in new buildings?
 
Russell

Newbie

Joined: 16/08/2009
Location: United States
Posts: 10
Posted: 03:01am 22 Aug 2009
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readyakira the link is http://www.thebackshed.com/Windmill/articles/TL084-Controlle r.asp this is the same place that this form is on.
 
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