UP board with Batteries
Fahim Al Hasnaeen
New Member Posts: 4 ✭
in Peripherals
What would be the best way to run an UP board hooked on to an Resistive touch HDMI 5 inch display with Lithium Polymer batteries?
Power requirements?
Power requirements?
Comments
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Hi,
We have not performed testing with batteries so far.
The recommended power supply is a 5V 3A and it is important that the battery can provide a stable voltage to the boards.
Unfortunately most of the cheap phone charging batteries are not suitable for the purpose of powering an UP Board. -
I use a 4S li-ion pack and a switching regulator off eBay, works great
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Hi MarcFinns, could you please be specific about the switching regulator that you use? any circuit diagrams will be appreciated.
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I used a Li-ion battery control module that allows charging and loading at the same time. Output voltage is however unregulated.
I then used a cheap step down module off eBay to trim it to 5v.
Specifically, if you don't have plenty of peripherals you can use one based on LM2596 (3A) while if you need more you can go for one based on XL4005. I tried both and work like a charm.
(I also designed a simple startup / shutdown circuit for UP and monitor based on LTC2951 but this is entirely optional).
If you need more, write me back and this evening I can post links /schematics. -
Would be great if you could provide the Schematics
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FahimHasnaeen wrote:Would be great if you could provide the Schematics
3A converter based on LM2596 is here
5A converter based on XL4005 is here
Attached schematics and pics of power board for 5V (UP) and 12V (monitor) including on/off logic.
Please note that the board requires to desolder the control pins of the ICs and connect them to the appropriate pad. -
I tried the battery problem and finally found the available battery within two months. I can get the board to start up smoothly and keep working for 5-8 hours. If you are interested, please send an email to: hugoshih@gmail.com
