Skip to main content

gunrunnerjohn posted:

Because you need higher voltage rating than 5V.

Right.  It was early this morning and I didn't notice the decimal point in the voltage rating in the picture.  Thanks for the reply.  I have no experience with these supercaps.  Does the voltage equalize well across the series pair.  In the old days putting electrolytic caps in series required a high value resistor in parallel with the two caps to equalize the voltage division.

If the caps are matched, there is no need for balancing.  There's no harm in adding a high value resistor, say 10k, across each cap.  You could use a very small resistor, 1/8W would be plenty.  Since I buy name brand caps in quantity, they're all coming from one lot, and they're matched.  Note that the 5V caps are really two 2.7V caps internally, and they don't use any balancing for those.  I'm guessing they're thinking any small imbalance will be covered by the .2V margin they allowed.

gunrunnerjohn posted:

If the caps are matched, there is no need for balancing.  There's no harm in adding a high value resistor, say 10k, across each cap.  You could use a very small resistor, 1/8W would be plenty.  Since I buy name brand caps in quantity, they're all coming from one lot, and they're matched.  Note that the 5V caps are really two 2.7V caps internally, and they don't use any balancing for those.  I'm guessing they're thinking any small imbalance will be covered by the .2V margin they allowed.

GRJ, thanks very much for the details.  It is great that you are willing to share your knowledge and experience on this forum.

Hay Ron, 

Appreciate your answer on the BCR, but it doesn't explain why Marty F. was against using the BCR on PS-1. If anyone like GRJ can give me the reason, then it satisfy's my inqisivetiveness. I'm not saying it won't work, I just want to know why (Marty must have had a reason, and I respect it) he didn't approve  of it!

     Steam Forever

           John

Wow LOL. Didn't mean to cause such a ruckus.  

If I may, what are the "Cheap" BCR's vs, I assume, "Not Cheap"?

Also, would the homemade version we're contemplating fall into the former or latter category?

Do I need to rethink my plan of building a bunch of BCR's for my old PS1 engines?  Is there anything that WON'T scramble, smoke, or otherwise destroy my trains that I just want to watch go around the track someday?

Seems like such a chore... Maybe just rip it all out and put in a rectifier and hope for the best?

 

 

I don't have a problem with BCRs in PS1 locos as long as the operator understands that they must be charged up prior to pressing the direction button, otherwise you run into the same problems as operating a PS1 loco with a dead battery.  The processor shuts down prematurely before code is written to memory and the board is scrambled; i.e., the three clanks of death (which can be corrected with a reset chip).

Jeff_the_Coaster_Guy posted:

Wow LOL. Didn't mean to cause such a ruckus.  

If I may, what are the "Cheap" BCR's vs, I assume, "Not Cheap"?

Also, would the homemade version we're contemplating fall into the former or latter category?

Do I need to rethink my plan of building a bunch of BCR's for my old PS1 engines?  Is there anything that WON'T scramble, smoke, or otherwise destroy my trains that I just want to watch go around the track someday?

Seems like such a chore... Maybe just rip it all out and put in a rectifier and hope for the best?

I build my 9V models with two AVX or NESSCAP 5V supercaps.  They're higher quality caps than are used in the "real" BCR, so I'd say the brand name one is the "cheap" one.   The thing is only supercaps and a battery clip, pretty hard to go wrong.

All I can say is the couple PS-1 locos I have with BCRs in them run fine.  I do remember reading that there are a small few locomotives, PS-1 and PS-2 that just don't work with BCRs in them, and the only way to find out which locos didn't like them was to put one in.  Never heard of the locomotive not working once a MTH rechargeable battery was installed afterwards.

The only other issue I can think of is that there is a possibility someone doesn't let it sit after power up to charge the BCR because either people they are impatient, don't know they need to, or forget they need to and it scrambles the boards.

If you are still looking for some BCRs I have about a half dozen in stock at the shop, White Rose Hobbies, and I can get them shipped out today. Give the shop a call, and we can get you hooked up with them. Ive installed quite a few in the engines we get into the shop with a bad "white" battery in them and they run great after replacing. I do remember seeing a post about why not to use them, but again, I cant remember where I saw that as, but in my experience I haven't had an issue using them either for customers of for my personal collection of old PS1 steamers. Like I said if you are looking for some, ive got them instock at White Rose Hobbies in York PA

Add Reply

Post
OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
330-757-3020

www.ogaugerr.com
×
×
×
×
Link copied to your clipboard.
×
×