X728-hardware

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X728-IMG-7960-1.jpg

X728-IMG-7979-1.jpg

Power Jack and Connectors

  1. X728 powers the Raspberry Pi via the 40-pin header (Pin 2 & 4)
  2. Don't power the Raspberry Pi via the Pi's type-C USB socket
  3. X728 can be powered via the onboard DC jack or Type-C USB power socket

6-Pin Function Header

Connector for External Power Switch

  1. Please use momentary switch only and don't use latching switch
  2. Connector - Pitch 2.0mm 4pos

Power button (Script for power mgnt installed)

Function LEDs

Fuel gauge - LED Indicator

Operation of Discharging:

Operation of charging:

Pins and GPIO used

18650 battery dimension

18650size.png Do not use 18650 battery with built-in protection circuit

Installation Guide

X728

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Anonymous user #6

3 months ago
Score 0++

Clarify please feature "Auto-On". Here is scenario: 1. Software detect AC-power loss. 2. Software gracefully shutdown RPi (battery still charged!). 3. AC-reapplied.

Will be RPi turned automatically on?

Anonymous user #7

14 days ago
Score 0++
Has this been confirmed or any feedback?

Xiali

13 days ago
Score 0++
Your question seems to be contradictory. . . .

Anonymous user #7

3 days ago
Score 0++

The scenario is this. Basically you want to use the UPS as a means of graceful software shutdown.

1. On AC Power Loss -> graceful software shutdown 2. On AC Power Gain -> boot raspberry Pi

I cant seem to find a configuration that will allow you to use the UPS in this way.

Anonymous user #7

3 days ago
Score 0++
Is there a way you could send a signal to tell the UPS only provide backup power for x amount of seconds? This would allow for an AC power controlled graceful shutdown and boot.

Anonymous user #5

4 months ago
Score 0++
Can I power the X825 board as well as the RPi4B from the X728? How do I connect it?

Cindy

4 months ago
Score 0++

Hello sir,

When use the X728 with X825 board, please power from X725, do not power from X825 or Raspberry Pi 4.

Anonymous user #5

4 months ago
Score 0++
One more question: why can't I use protected 18650 batteries? They are more safe, aren't they?

Anonymous user #5

4 months ago
Score 0++
I bought the X825/X735 set with case and power supply a short time ago and now want to replace the X735 by the X728. Is this possible? It will not fit in the case anymore though and the cooling fan will be gone, so what is the best solution to avoid overheating?

Anonymous user #4

4 months ago
Score 0++
How could one write a script to trigger the x728off code to run in the event of a Power Loss Detection

Anonymous user #1

6 months ago
Score 0++
Which jumpers are which?

Anonymous user #2

5 months ago
Score 0++

Pin assignments for the jumpers are printed on the underside of the board at least! :

From the Power jack end : AON (Auto On) PLD (Power loss detection) ASD (Auto shutdown)

to nearest the USB-C Connector

Anonymous user #3

5 months ago
Score 0++

No, correction, it reads thus :

From the Power jack end : PLD (Power loss detection)

AON (Auto On) is the middle pair.

ASD (Auto shutdown)

is nearest the USB-C Connector.