Search found 176 matches

by kje
Feb 23 2016 4:29am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

It probably went over the 63v rating and blew. Luckily, if that one goes, there's a good chance everything else will be OK. Just replace the cap. Even with a higher voltage rated cap, I wouldn't go over 60v or so. The output diodes will be next. It's possible your 10k trimmer was set to less than 1...
by kje
Feb 22 2016 2:08pm
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Nice. Can I do this with a 10k trimmer pot? Yes, if that's easier. A fixed resistor will just change the range of the stock voltage adjuster. I soldered a 10k trimmer pot to R40 but when I powered the power supply I blowed one of the capacitors as you can see on the picture below. https://www.dropb...
by kje
Feb 20 2016 1:52pm
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Nice. Can I do this with a 10k trimmer pot?
by kje
Feb 19 2016 10:18am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Oops, the picture I have of the top side doesn't show the voltage adj pot. Here is a video of the circuit: https://www.dropbox.com/s/ieesyv8h3xree0k/20160211_141817_001.mp4?dl=0 And here is a picture: https://www.dropbox.com/s/45zj8devjzcydvb/20160219_160959.jpg?dl=0 And a close up picture: https:/...
by kje
Feb 18 2016 6:57am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

fechter wrote:If the voltage isn't high enough for the pack, the current won't be at the limit, so the limiter circuit won't do anything.

Let me check which resistor will take it up.
Great. I'm looking forward to it. :)
by kje
Feb 17 2016 3:15pm
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Sorry for the delay, yes I can trace it back to the shunt now. R35 is the one. I can't tell what the stock value of R35 is, but you could measure it with an ohmmeter or tell from the color bands. Anyway, reducing the value of R35 should lower the current limit. You could try placing a trimmer pot a...
by kje
Feb 16 2016 7:27am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Sorry for the delay, yes I can trace it back to the shunt now. R35 is the one. I can't tell what the stock value of R35 is, but you could measure it with an ohmmeter or tell from the color bands. Anyway, reducing the value of R35 should lower the current limit. You could try placing a trimmer pot a...
by kje
Feb 15 2016 6:44am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current. To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics. Are you able to trace the circuit back to the shunt on this picture? 20160127_14313...
by kje
Feb 11 2016 8:25am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current. To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics. Here is a video of the circuit: https://www.dropbox.com/s/ieesyv8h3xree0k/20160211_...
by kje
Feb 09 2016 4:26pm
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I don't have enough of the board in the pics to be sure, but R35 looks like the one to put a pot across to lower the current. To be sure, I need to trace the circuit back to the shunt, which I don't see in the pics. Are you able to trace the circuit back to the shunt on this picture? 20160127_14313...
by kje
Feb 07 2016 7:21am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I'll take a look. Can you read any number off the 16 pin chip? What model is the supply? The number of the 16 pin chip is: 15407YH TL494CN The supply model is 48V 7.5A 360W Bought it here: http://www.ebay.com/itm/311001005100?_trksid=p2057872.m2749.l2649&var=610293600576&ssPageName=STRK%3AMEBIDX%3A...
by kje
Feb 05 2016 8:41am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I wonder if I can do the same on my 350w power supply... I traced out the circuit and used the datasheet for the controller chip. There's a good chance you can do the same thing with your supply. If you post good pictures of both sides of the board, I might be able to trace it out for you. Here is ...
by kje
Feb 01 2016 1:32pm
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

fechter wrote:
Yes, those should work fine.
I've taken additional picture (look at the attachment under) of underside of circuit board so R35 function might, possibly, have a chance of being determined?
Does R35 in this power supply controls amp output?
file.jpeg
file.jpeg (178.33 KiB) Viewed 1613 times
by kje
Feb 01 2016 8:49am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

Can I use this to limit the current? ☺ http://www.ebay.com/itm/251877265728?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Yes, those should work fine. Thank you. How did you find out where to place the 10k trimmer pot so the current limit can be adjusted? I wonder if I can do the same ...
by kje
Feb 01 2016 6:46am
Forum: Battery Technology
Topic: 48V 18650 configuration
Replies: 38
Views: 4028

Re: 48V 18650 configuration

I've taken additional picture of underside of circuit board so R35 function might, possibly, have a chance of being determined?
Does R35 in this power supply controls amp output?
file.jpeg
file.jpeg (178.33 KiB) Viewed 372 times
by kje
Jan 27 2016 8:40am
Forum: Battery Technology
Topic: 48V 18650 configuration
Replies: 38
Views: 4028

Re: 48V 18650 configuration

Is R35 reducing the amps on this board?
20160127_143100.jpg
20160127_143131.jpg
by kje
Jan 27 2016 6:03am
Forum: Battery Technology
Topic: 48V 18650 configuration
Replies: 38
Views: 4028

Re: 48V 18650 configuration

I have this 7.5A 360W 48V power supply. I will charge my 13s pack with 54.6V. Can I solder in a resistor in R35? A 220 ohm resistor will be 54.6V / 220 ohm = 0.248 A? Sounds like I should have a smaller resistor like 10 ohm? 54.6V / 10 ohm = 5.46A? And what wattage should it be? (The resistors physi...
by kje
Jan 26 2016 9:21am
Forum: Battery Technology
Topic: Meanwell clone- AD488.3-400W power supply mods
Replies: 124
Views: 13237

Re: Meanwell clone- AD488.3-400W power supply mods

I found this one on eBay for around $22 usd. It's very similar to the Meanwell S-350 but rated for 400W. http://www.ebay.com/itm/110-220V-to-DC-48V-8-3A-400W-Transformer-Switch-Power-Supply-for-LED-Strip-0R00-/391221862040?hash=item5b16a3de98:g:hyEAAOSw4HVWCfUo Nameplate label (sorry about tearing ...
by kje
Jan 26 2016 4:58am
Forum: Battery Technology
Topic: MeanWell Mods - S-150-48 +Mega-Mod
Replies: 14
Views: 4849

Re: MeanWell Mods - S-150-48

Can I solder inn this 5w 22ohm resistor in series between my 7.5A 360W 48V power supply and the battery pack? Will it reduce the amps while charging? http://www.ebay.com/itm/400552119082?redirect=mobile Or this 10k trim pot? http://www.ebay.com/itm/251877265728?_trksid=p2057872.m2749.l2649&ssPageNam...
by kje
Jan 25 2016 8:33am
Forum: Battery Technology
Topic: End Voltage on A123 batteries
Replies: 2
Views: 445

End Voltage on A123 batteries

What is the max end voltage on A123 batteries?
Should I charge them to 3.6V each cell? Or higher?
by kje
Jan 24 2016 12:33pm
Forum: Battery Technology
Topic: DIY Lithium Jump Starter
Replies: 50
Views: 17328

Re: DIY Lithium Jump Starter

What is the max end voltage on A123?
3.6V for each cell?
by kje
Jan 16 2016 2:27pm
Forum: Battery Technology
Topic: 48V 18650 configuration
Replies: 38
Views: 4028

Re: 48V 18650 configuration

wesnewell wrote:Could have something to do with pulling 7A from a 3A rated supply.
Shouldn't the power supply limit the current by itself?
by kje
Jan 16 2016 9:43am
Forum: Battery Technology
Topic: MeanWell Mods - S-150-48 +Mega-Mod
Replies: 14
Views: 4849

Re: MeanWell Mods - S-150-48

I bought this 7.5A 360W 48V power supply. (As my last 3A 150W 48V fried)

http://www.ebay.com/itm/311001005100?_t ... EBIDX%3AIT

Can I Remove R33 & R38 and replace with a .5k (500ohm - 500B) pot? Will this allow ~0A to 5.4A adjustment?
by kje
Jan 16 2016 5:15am
Forum: Battery Technology
Topic: MeanWell Mods - S-150-48 +Mega-Mod
Replies: 14
Views: 4849

Re: MeanWell Mods - S-150-48

MeanWell Mods MeanWell Mods - S-150-5 MeanWell Mods - S-150-12 MeanWell Mods - S-150-24 MeanWell Mods - S-150-48 MeanWell Mods - S-240-48 MeanWell Mods - S-350-48 See- ES Wiki MeanWell Mods for more MeanWell S-150-48 http://endless-sphere.com/w/images/e/ec/S-150-48a.jpg Specs: *Mean Well S-150-48 *...
by kje
Jan 15 2016 6:45pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1627
Views: 435063

Re: Homemade Battery Packs

I used 16awg wires.

How can I limit/adjust the amps?