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OV Module

 
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rondefly(at)rtriano.com
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PostPosted: Mon Jan 23, 2006 7:42 am    Post subject: OV Module Reply with quote

Hi, Could someone please point me in the right direction on the parts needed
for the OV Module, My question is on the Potentiometer R2, the parts list
calls it out as

3292W501, DigiKey has no such number. I am not electronically qualified to
guess at what it is.



Thanks



Ron Triano

http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page10.html


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nuckollsr(at)cox.net
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PostPosted: Mon Jan 23, 2006 9:07 am    Post subject: OV Module Reply with quote

At 07:41 AM 1/23/2006 -0800, you wrote:

Quote:


Hi, Could someone please point me in the right direction on the parts needed
for the OV Module, My question is on the Potentiometer R2, the parts list
calls it out as

3292W501, DigiKey has no such number. I am not electronically qualified to
guess at what it is.

I'm glad you posted this note. The search phrase to find it in Digikey
is 3192W-501. I'm pleased that this error was called to my attention
because it highlights another more serious error on my part. The 3292 series
pots are unnecessarily expensive (15.00/ea!) for this task. I'm going to
change the call-out to a 3296W-501 for $2.70 each in single lots.

Appreciate the heads-up on this!

Bob . . .


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nuckollsr(at)cox.net
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PostPosted: Mon Jan 23, 2006 9:19 am    Post subject: OV Module Reply with quote

At 11:07 AM 1/23/2006 -0600, you wrote:

Quote:

<nuckollsr(at)cox.net>

At 07:41 AM 1/23/2006 -0800, you wrote:

>
>
>Hi, Could someone please point me in the right direction on the parts needed
>for the OV Module, My question is on the Potentiometer R2, the parts list
>calls it out as
>
>3292W501, DigiKey has no such number. I am not electronically qualified to
>guess at what it is.

I'm glad you posted this note. The search phrase to find it in Digikey
is 3192W-501. I'm pleased that this error was called to my attention
because it highlights another more serious error on my part. The 3292
series
pots are unnecessarily expensive (15.00/ea!) for this task. I'm going to
change the call-out to a 3296W-501 for $2.70 each in single lots.

Appreciate the heads-up on this!


The drawing has been fixed and Rev D posted at:

http://aeroelectric.com/articles/Crowbar_OV_Protection/Crowbar_D.pdf

Bob . . .


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rondefly(at)rtriano.com
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PostPosted: Thu Jan 26, 2006 6:48 am    Post subject: OV Module Reply with quote

I could not get the listed resistors at Digikey and went to Frys, was not
able to get the 1% but was able to get some 2% and 5 %, also on the
BC1.62KZCT could only get a 1.6. I am having problems getting up to the
voltage stated in the troubleshooting area. Is it the tolerance of the
resistors or that 1.62 one maybe? I have checked all my solder joints and
went completely through the troubleshooting guide Bob has with the parts
list. Any help is appreciated.



Ron Triano


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nuckollsr(at)cox.net
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PostPosted: Thu Jan 26, 2006 11:09 am    Post subject: OV Module Reply with quote

At 06:47 AM 1/26/2006 -0800, you wrote:

Quote:


I could not get the listed resistors at Digikey and went to Frys, was not
able to get the 1% but was able to get some 2% and 5 %, also on the
BC1.62KZCT could only get a 1.6. I am having problems getting up to the
voltage stated in the troubleshooting area. Is it the tolerance of the
resistors or that 1.62 one maybe? I have checked all my solder joints and
went completely through the troubleshooting guide Bob has with the parts
list. Any help is appreciated.

Seems Digikey has shuffled the deck again on catalog numbers.
The recommended parts list has been updated to reflect current
offerings at:

http://aeroelectric.com/articles/Crowbar_OV_Protection/Crowbar_E.pdf

It's not possible to troubleshoot your project without seeing
it. If you'll mail it to me with some cash for return postage,
I'll look it over.

6936 Bainbridge Road
Wichita, KS 67226-1008

Bob . . .


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rondefly(at)rtriano.com
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PostPosted: Sat Jan 28, 2006 4:54 pm    Post subject: OV Module Reply with quote

Thanks Bob, for the generous offer to look over my OV module. I checked over
everything one more time and saw I forgot to add the 392 resistor, that was
another one I could not locate. I was able to get a 360 Ohm one and tried
it. Now I can get to the 1870 ohms with R2 turned up, and I am around 57
something on the ground side. Did not go any further with the test. Do you
think I can get to the listed ohms if I find a 392 ohm resistor?



Ron Triano

http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page10.html


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klehman(at)albedo.net
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PostPosted: Sun Jan 29, 2006 5:50 am    Post subject: OV Module Reply with quote

Ron
Digi-key will have numerous resistors that will do the job under various
part numbers. 2% and 5% resistors will change value more with
temperature changes but I doubt that will cause any problem for you.
Exact resistance values are not necessary. The resistors form a voltage
divider. The voltage will be the same ratio as the resistance that you
use if you wish to do the math. Or just assemble what you have and
measure the voltage. As long as you can adjust the trip voltage to the
correct value you should be fine. If it won't adjust to the correct
value then you should only have to change one resistor.
Ken

Ron wrote:

>
>
>
>
>I could not get the listed resistors at Digikey and went to Frys, was not
>able to get the 1% but was able to get some 2% and 5 %, also on the
>BC1.62KZCT could only get a 1.6. I am having problems getting up to the
>voltage stated in the troubleshooting area. Is it the tolerance of the
>resistors or that 1.62 one maybe? I have checked all my solder joints and
>went completely through the troubleshooting guide Bob has with the parts
>list. Any help is appreciated.
>
>
>
>Ron Triano


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klehman(at)albedo.net
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PostPosted: Wed Feb 01, 2006 11:16 am    Post subject: OV Module Reply with quote

Hi Bob

Below I believe the link below should be to rev E at:
http://www.aeroelectric.com/articles/Crowbar_OV_Protection//Crowbar_E.pdf

On page one I see you've revised R5 to 6.04K probably to reduce the
number of different parts. However on page 3 it is still shown as the
old 10K value.

On page 4, paragraph 2 refers to the 12 volt reference measured at (C).
However the diagram on page 3 now shows TWO C points and it shows them
as the revised added capacitors. It might be less confusing to designate
the capacitors in some other way and put point C back as designating the
reference voltage point.

thanks again
Ken
Robert L. Nuckolls, III wrote:

Quote:


At 11:07 AM 1/23/2006 -0600, you wrote:



>
><nuckollsr(at)cox.net>
>
>At 07:41 AM 1/23/2006 -0800, you wrote:
>
>
>
>>
>>
>>Hi, Could someone please point me in the right direction on the parts needed
>>for the OV Module, My question is on the Potentiometer R2, the parts list
>>calls it out as
>>
>>3292W501, DigiKey has no such number. I am not electronically qualified to
>>guess at what it is.
>>
>>
> I'm glad you posted this note. The search phrase to find it in Digikey
> is 3192W-501. I'm pleased that this error was called to my attention
> because it highlights another more serious error on my part. The 3292
>series
> pots are unnecessarily expensive (15.00/ea!) for this task. I'm going to
> change the call-out to a 3296W-501 for $2.70 each in single lots.
>
> Appreciate the heads-up on this!
>
>
The drawing has been fixed and Rev D posted at:

http://aeroelectric.com/articles/Crowbar_OV_Protection/Crowbar_D.pdf

Bob . . .




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nuckollsr(at)cox.net
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PostPosted: Thu Feb 02, 2006 6:12 am    Post subject: OV Module Reply with quote

At 04:27 PM 1/31/2006 -0500, you wrote:

Quote:


Hi Bob

Below I believe the link below should be to rev E at:
http://www.aeroelectric.com/articles/Crowbar_OV_Protection//Crowbar_E.pdf

On page one I see you've revised R5 to 6.04K probably to reduce the
number of different parts. However on page 3 it is still shown as the
old 10K value.

Correct.
Quote:
On page 4, paragraph 2 refers to the 12 volt reference measured at (C).
However the diagram on page 3 now shows TWO C points and it shows them
as the revised added capacitors. It might be less confusing to designate
the capacitors in some other way and put point C back as designating the
reference voltage point.

Agreed. The "A", "B", and "C" with arrows are keyed with the
text as test points while smaller, standalone bubbles are
revision flags. The neophyte observer could easily mix the
two. I think I'll change "A", "B" and "C" test points to
numbered values.

I've had quite a bit of feedback from individuals who
had various start up problems with this project . . most
had to do with packaging. I'm thinking about offering an
etched circuit board that uses thru-hole parts and
gets the critter down to a 1.25" square board that will
fit into the same package as

http://www.aeroelectric.com/Catalog/AEC/9011/9011-700-1.pdf

I just ordered a couple hundred potting shells for this
and other projects. I could offer a kit of board and
potting shell which would fix the packaging issues and
improve on probability of having it work right the first
time.

Thanks!

Bob . . .


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rondefly(at)rtriano.com
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PostPosted: Fri Feb 03, 2006 9:05 am    Post subject: OV Module Reply with quote

Thanks for the help guys. I started to check and found closer resistors to
the ones called out and changed the ones per Bobs latest revision. The
module works as it should and cuts the power at 16V.



Ron Triano

http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page10.html


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