Develop ultra capacitor power supply and LiFePO4 battery power supply - Page 2

esl 63 · 7th September 2018, 08:57 PM

Some 25V Electrolytics and then polyprop close to the consumer circuit, this could work... I want to see measurements as well, maybe a shunt regulator could do the final dBs..

GOR3 · 7th September 2018, 09:01 PM

Rayma,
I've had the same experience as Ian over about the same period of time. I use two cells, one to recharge while the other is in place, so each has about half the use (until one of them, harboring an undisclosed suicide wish, became involved in a brief but spectacular welding incident).
George

wcwc · 7th September 2018, 09:08 PM

Would each power supply only be able to supply power to one location? Do we treat it like a regulator?

iancanada · 7th September 2018, 10:03 PM

@wcwc

Try one rail for one location as possible as you can. However based on my real experience, one rail for multiple location would still be OK due to the very low internal impedance. Just trust your ears

.

I do not suggest using and LDO or regulator after LifePO4 or ultra capacitor power supplies, that could degrade the power supply quality.

A lot of people use the small battery manage board for my FIFO project. It's OK, doesn't change the good sound quality, but just feels like a prototype. I'm gonna design a completed all in one solution this time, more closed to finished

.

Regards,
Ian

analog_sa · 7th September 2018, 10:18 PM

Hi Ian. How do you intend to do the switching between the ultracap banks? Relays?

Great projects as always, cannot wait

mcluxun · 10:28 PM

Subscribed.
I'm thrilled to use them in my system.

acg · 7th September 2018, 10:29 PM

Subscribed. Very interested.

iancanada · 7th September 2018, 10:51 PM

Quote:

Originally Posted by analog_sa

Hi Ian. How do you intend to do the switching between the ultracap banks? Relays?

Great projects as always, cannot wait

@analog_sa

To switch between ultra capacitor banks, relays would have better isolation performance. However, they are a bit noisy, even to switch them every 5 to 10 minutes.

MOSFETs don't have this kind of problem, but they have small leak capacitance around tens of pF. This number could be still reduced by half if to switch both ground and power rail at same time.

MOSFET solution could also be complicated but more flexible.

It's really hard to decide

Regrads,
Ian

iancanada · 8th September 2018, 04:03 AM

I have enough LifePO4 cells to do the test

LifePO4BatteryPack by Ian, on Flickr

Ian

clsidxxl · 8th September 2018, 09:52 AM

Hi Ian,The most famous subject of the year

7th September 2018, 10:03 PM	#14
iancanada diyAudio Member Join Date: Dec 2009 Location: Toronto	@wcwc Try one rail for one location as possible as you can. However based on my real experience, one rail for multiple location would still be OK due to the very low internal impedance. Just trust your ears. I do not suggest using and LDO or regulator after LifePO4 or ultra capacitor power supplies, that could degrade the power supply quality. A lot of people use the small battery manage board for my FIFO project. It's OK, doesn't change the good sound quality, but just feels like a prototype. I'm gonna design a completed all in one solution this time, more closed to finished . Regards, Ian __________________ gitHub: https://github.com/iancanada/DocumentDownload GB2020Q3: https://www.diyaudio.com/forums/grou...ml#post6413248 YouTube Channel: https://www.youtube.com/channel/UC75...iy-PHSJB-8PgPg

7th September 2018, 10:19 PM	#16
mcluxun diyAudio Member Join Date: Nov 2010	Subscribed. I'm thrilled to use them in my system. Last edited by mcluxun; 7th September 2018 at 10:28 PM.

8th September 2018, 04:03 AM	#19
iancanada diyAudio Member Join Date: Dec 2009 Location: Toronto	I have enough LifePO4 cells to do the test LifePO4BatteryPack by Ian, on Flickr Ian __________________ gitHub: https://github.com/iancanada/DocumentDownload GB2020Q3: https://www.diyaudio.com/forums/grou...ml#post6413248 YouTube Channel: https://www.youtube.com/channel/UC75...iy-PHSJB-8PgPg

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7th September 2018, 08:57 PM	#11
esl 63 diyAudio Member Join Date: Aug 2010 Location: Hisingisland	Some 25V Electrolytics and then polyprop close to the consumer circuit, this could work... I want to see measurements as well, maybe a shunt regulator could do the final dBs..

7th September 2018, 09:01 PM	#12
GOR3 diyAudio Member Join Date: Jun 2011 Location: Connecticut	Rayma, I've had the same experience as Ian over about the same period of time. I use two cells, one to recharge while the other is in place, so each has about half the use (until one of them, harboring an undisclosed suicide wish, became involved in a brief but spectacular welding incident). George

7th September 2018, 09:08 PM	#13
wcwc diyAudio Member Join Date: Oct 2011	Would each power supply only be able to supply power to one location? Do we treat it like a regulator?

7th September 2018, 10:18 PM	#15
analog_sa diyAudio Member Join Date: Aug 2002 Location: Cascais	Hi Ian. How do you intend to do the switching between the ultracap banks? Relays? Great projects as always, cannot wait

7th September 2018, 10:29 PM	#17
acg diyAudio Member Join Date: Oct 2013 Location: Sunshine State	Subscribed. Very interested.

8th September 2018, 09:52 AM	#20
clsidxxl diyAudio Member Join Date: Sep 2012 Location: Strasbourg	Hi Ian,The most famous subject of the year