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Develop ultra capacitor power supply and LiFePO4 battery power supply
Develop ultra capacitor power supply and LiFePO4 battery power supply
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Old 8th May 2021, 03:40 PM   #1451
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
Default UcConditioner New 450F BCAP0450 P270 S18 mounting solution

I understand that the ultra-capacitors are now having very long lead time under this COVID situation.

But just found the new MAXWELL 450F BCAP0450 P270 S18 ultra-capacitors are still keep in stock. This ultra-capacitor will be great to work with my UcConditioner. But the footprint is different.

Now I have solution to mount them to my UcConditioner.

1. Bent the two NC pins and then cover with tape to avoid any possible short circuit.
2. Solder the two 450F UCs to the UcConditioner at the bottom side of the UcConditioner PCB.
3. Make sure + and - are at correct positions.

Please refer the attached pictures for details. Please let me know if you have any questions.

If it is required, you can disassemble the input/output terminal block connectors and then flip/solder them to the other side of PCB.

Good weekend.
Ian
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Last edited by iancanada; 8th May 2021 at 03:45 PM.
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Old 9th May 2021, 04:59 PM   #1452
Haze Head is online now Haze Head  United States
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Nice to see alternative power schemes! I'm almost a year into a full system battery powered project. I was using the 2170 lipo, but lately I'm working very hard to get a LTO system developed. Here's to stored energy
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Old 9th May 2021, 05:04 PM   #1453
cucuclock is offline cucuclock  France
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Hi Ian,
probably is not a good thread, I'm interested in your LINEARPI DUAL 5v but I don't understand whether is 2.5A splint in 2 or 2.5A for each rail. Many thanks
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Old 9th May 2021, 06:07 PM   #1454
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
That 2.5A for each rail.

Basically a LinearPi dual is two LinearPi solo PCB linked together.

Good weekend.
Ian
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Old 12th May 2021, 12:30 PM   #1455
eduard is offline eduard  Netherlands
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Hello,
I just ordered parts in Canada.
Because i need to order chokes anyway i decided to make an LCRC supply followed by an LM338 . Will use one for the LIfepo4 and one for a Roon nucleus.
The 350 mH 4A input choke will get rid of a lot of garbage coming out of the wall, the switching from the rectifier ( because there will be no switching) and the charging pulses.
With the Roon it will probably work both ways because it is full of switching supplies.
Psud will show a gentle rise of the voltage and a ripple close to 1 mV.
Some experts say that the amount of ripple isnt that important because of the regulator. It is more about things the choke can do and the regulator cannot.
Maybe in the lifepo4 it will be mainly the 5 volt supply that will profit because they lifepo4 could be disconnected from the charging circuit once they are '' full ''
The manual is not clear and Ian not answered . Can i create 3,3 volt each with two or more in parallel to give them a bigger energy level???
Greetings, Eduard
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Old 12th May 2021, 12:56 PM   #1456
iancanada is offline iancanada  Canada
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Develop ultra capacitor power supply and LiFePO4 battery power supply
@ eduard

Did you simulate the choke? Some times it can generate big low frequency wave.

Ian
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Old 12th May 2021, 01:16 PM   #1457
eduard is offline eduard  Netherlands
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Hello Ian,
I tried it with PSUD
Using 350 millihenry 4A 2,8 ohm ( but i had to add an extra resistor to get no overshoot)
Then 94000 microfarad 200 milliohm
10 mOhm resistor
47000 microfarad 400 milliohm with a 3,5A current load.
No PSUD on this PC but if i am right this were the values to create a 21 volt input for the LM338.
Maybe you have a more sophisticated program?
Greetings, Eduard
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Old 13th May 2021, 06:11 AM   #1458
igor61 is offline igor61
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Hi, everyone,
My name is Igor and I desperately need some help.

I bought Lifepo4 and 10 batteries of which I decided to use only 7.
My idea was to have 3.3V on J1, 3.3V on J2, 3.3V on J4 (by shorting TP11-12) and 13.2V on J3.
I have batteries in BT1,2,3,4,5,6,7 and no batteries in 8,9 and 10.
When I connect the rails to Ian's DAC (3 x 3.3V) and I/V STD Mk II (13.2V) music starts playing for 3 seconds and then in 3-5 seconds no music at all.
On the other hand, if the I/V is LL1544A, everything works perfectly (no 13.2V needed).
What did I do wrong?

All the very best with your projects,
Igor
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Old 13th May 2021, 09:40 AM   #1459
AirAir is offline AirAir
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My version is for a more compact placement in the case.
A trial version, the racks are 2.5 mm after the epoxy glued.
I can share a 3D model.
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Old 13th May 2021, 10:09 AM   #1460
Supersurfer is offline Supersurfer  Netherlands
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Quote:
Originally Posted by igor61 View Post
Hi, everyone,
My name is Igor and I desperately need some help.

I bought Lifepo4 and 10 batteries of which I decided to use only 7.
My idea was to have 3.3V on J1, 3.3V on J2, 3.3V on J4 (by shorting TP11-12) and 13.2V on J3.
I have batteries in BT1,2,3,4,5,6,7 and no batteries in 8,9 and 10.
When I connect the rails to Ian's DAC (3 x 3.3V) and I/V STD Mk II (13.2V) music starts playing for 3 seconds and then in 3-5 seconds no music at all.
On the other hand, if the I/V is LL1544A, everything works perfectly (no 13.2V needed).
What did I do wrong?

All the very best with your projects,
Igor
If you use the standard iv board with the opamps you need to feed it with +13v and -13v so you need all batteries connected.
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