Ok, Doing some progress...
I got Doede's Eaton pack from digikey...and charged it with my CC/CV lab supply psu. As the clocks are running in a pretty wide voltage spectrum, I charge them to 17V (which is what Andreas battery supply as well uses) and let two Drixo play in parallel...after 10 Min we are at 15.5V. Assuming that you could down to 12.5V, this mean that one pack would be good for 30min "UCpure" time for two clocks or 1 hour for one clock (no PSU connected, so the uptracap is like a battery). That is not bad and a cheap way of understand the sound differences.
The re-charging takes maybe 1 min with a 5A supply and can be done without destaching the Cap...
What is interesting is that this bank has a fairly high self-discharging rate, so after 3-4 hours of not using it the 17V drops to 14V withou any consumer attached to it...I guess the balancing circuits have some LEDs on it.
Soundwise i need to build a switch in so I can switch between supplies without the clocks being switched off...Even the 10sec unpowered seem to harm the performance of the clocks when switching the plugs.
So, stay tuned...
I got Doede's Eaton pack from digikey...and charged it with my CC/CV lab supply psu. As the clocks are running in a pretty wide voltage spectrum, I charge them to 17V (which is what Andreas battery supply as well uses) and let two Drixo play in parallel...after 10 Min we are at 15.5V. Assuming that you could down to 12.5V, this mean that one pack would be good for 30min "UCpure" time for two clocks or 1 hour for one clock (no PSU connected, so the uptracap is like a battery). That is not bad and a cheap way of understand the sound differences.
The re-charging takes maybe 1 min with a 5A supply and can be done without destaching the Cap...
What is interesting is that this bank has a fairly high self-discharging rate, so after 3-4 hours of not using it the 17V drops to 14V withou any consumer attached to it...I guess the balancing circuits have some LEDs on it.
Soundwise i need to build a switch in so I can switch between supplies without the clocks being switched off...Even the 10sec unpowered seem to harm the performance of the clocks when switching the plugs.
So, stay tuned...
Has any one used the new 3.8V Ultra capacitors https://amzn.to/3m7TgE7
up to 750 F (ROHS ?) or bigger
Also mouser has some 220F.
This will eliminate the need to put 2 caps in series for a 3.3v saving a lot of space I hope that trickles to the big 3000F ones
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See my Youtube Chanel
up to 750 F (ROHS ?) or bigger
Also mouser has some 220F.
This will eliminate the need to put 2 caps in series for a 3.3v saving a lot of space I hope that trickles to the big 3000F ones
-------------------------------------
See my Youtube Chanel
Is it going to have a 12V version available in the future?
I think this Ucpure product is so good, should be available from 3.3v to 24v! no kidding
No longer needed. For anyone coming across this, I have used a capacitor and a resistor in paralel to increase power on signal duration (e.g. 470 uF and 92KOhm resistor). Final duration of the signal should be aprox. initial duration in s + (R*C)s - both R and C values in F and Ohm. Experiment with different values.