ALLO USBridge Signature

[Crom]

I am powering the USBridge Sig with an Allo Shanti currently but I would like to introduce Ian's ConditionerPI which introduces an ultracapacitor filter into the GPIO power pins, see here: https://github.com/iancanada/DocumentDownload/tree/master/UltraCapacitorPowerSupply/ConditionerPi

 

I already added a small ultra/super capacitor across the 5v input of the signature with a small improvement and my question is whether it's possible to power the USBridge signature from the GPIO or is power input only at the USB-C socket.

 

thanks,
Crom

[Crom]

19 minutes ago, naum said:

Hi,

I don't have a Shanti power supply. What is the best way to ground the USbridge SIg?

Thanks

look in the manual on the allo site. I was on there earlierlooking for an answer to my question. On the PCB there's at least one earthing point marked that i saw.

[Crom]

16 minutes ago, hoobi said:

Hi, is it possible to bypass USB C power Usbridge sig and connect power direct to Usbridge PCB?

 

best regards

I would also like an authorative answer on this. From my personal experience, I powered mine for a long time through the USB connection to great effect. I think used one off Ian Canada's Ultra Capacitor hats to power via the GPIO. This definitely improved things but only lasted about 6 weeks before giving up the ghost!

[Crom]

Thanks @Audio_Allo can you confirm that those pins you indicate are connected to the 40-pin GPIO connector in the same way that one can power a standard Pi board?

This is the device I am looking to use: https://github.com/iancanada/DocumentDownload/blob/master/UltraCapacitorPowerSupply/ConditionerPi/ConditionerPi.pdf

Thanks.

[Crom]

7 hours ago, Yviena said:

Wait does the conditioner board fit on the Uxbridge sig, or do you need to modify the metal chassis?

No modification required. the conditioner board fitted into the 40-pin GPIO port and then I powered up the conditioner board (with the power supply that previously powered the USB signature board. Everything powered up as normal for weeks (I usually leave the Pi running continuously). About 2 months later, I powered down to do some tweaking and it wouldn't power up again.

 

This is why I was so surprised/confused by @Audio_Allo's response as it clearly worked (but sadly....then clearly didn't) ... so I'm trying to find out what happened and if it is a different pinout then how come it worked for a bit.

 

Why am  I bothered? Well, because the conditioner clearly improved the sound over merely using the existing power supply (which is pretty good in itself) and I would like to maintain that improvement if possible.

[Crom]

On 2/6/2021 at 11:39 AM, szczemirek said:

Could you share any photo, please.

Not right now as it's in pieces. Let me know if there's anything in particular you'd like to see and I'll see if I have an old one. All it is, is the pi conditioner board plugged into othe bridge PCB.

 

 

On 2/6/2021 at 12:41 PM, Yviena said:

Interesting, are you sure you had the correct voltage for the conditioner board, or maybe it just died due to some other failure?

 

What PSU did you use?

5v Shanti plugged into Pi conditioner boards.

It could easily have just died for another reason but it seems like too much of a co-incidence. I'll see if @audio_allo can let me know what the differences in GPIO pin configuration are so that we can clear this up.