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OV Module

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rondefly(at)rtriano.com
Guest

Posted: Mon Jan 23, 2006 7:42 am Post subject: OV Module

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

nuckollsr(at)cox.net
Guest

Posted: Mon Jan 23, 2006 9:07 am Post subject: OV Module

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 . . .

nuckollsr(at)cox.net
Guest

Posted: Mon Jan 23, 2006 9:19 am Post subject: OV Module

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 . . .

rondefly(at)rtriano.com
Guest

Posted: Thu Jan 26, 2006 6:48 am Post subject: OV Module

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

nuckollsr(at)cox.net
Guest

Posted: Thu Jan 26, 2006 11:09 am Post subject: OV Module

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 . . .

rondefly(at)rtriano.com
Guest

Posted: Sat Jan 28, 2006 4:54 pm Post subject: OV Module

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

klehman(at)albedo.net
Guest

Posted: Sun Jan 29, 2006 5:50 am Post subject: OV Module

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

klehman(at)albedo.net
Guest

Posted: Wed Feb 01, 2006 11:16 am Post subject: OV Module

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 . . .

nuckollsr(at)cox.net
Guest

Posted: Thu Feb 02, 2006 6:12 am Post subject: OV Module

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 . . .

rondefly(at)rtriano.com
Guest

Posted: Fri Feb 03, 2006 9:05 am Post subject: OV Module

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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