# Trouble powering core through relay shield \[Solved\]
**URL:** https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786
**Category:** Troubleshooting
**Created:** [February 11, 2014, 3:11pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786 "2014-02-11T15:11:42Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@jfisher](https://community.particle.io/u/jfisher)
#### Post date: [February 11, 2014, 3:11pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/1 "2014-02-11T15:11:42Z")
I have connected a 9 volt battery to the barrel connector on my relay shield and everything is fine for ~45 seconds then the power light on the shield goes out and the rgb led on the core dims greatly and has the red and green lit up. pressing the reset button and unplugging and re-plugging the barrel connector both result in the boot sequence and once it is about to reach breathing cyan it returns to the dim red and green. This has occurred when using tinker to control the relay as well as my own code.
I’m not sure if I’m doing something wrong.
Thanks in advance for any insight that you can offer
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### Author:  [@Dave](https://community.particle.io/u/Dave)
#### Post date: [February 11, 2014, 3:42pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/2 "2014-02-11T15:42:37Z")
What happens when you power the board with a 9v-12v 1-2amp wall wart, and not a battery?
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### Author:  [@Herner](https://community.particle.io/u/Herner)
#### Post date: [January 17, 2015, 9:28pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/3 "2015-01-17T21:28:42Z")
@Dave first off sorry for bumping such an old post but I am having the same issue with 2 relay shields I purchased. My power supply is 12volts DC at 500MA.
I have tried two relay shields and multiple different cores with similar results. Battery power pack delivered similar results.
Thanks for the help
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### Author:  [@Dave](https://community.particle.io/u/Dave)
#### Post date: [January 19, 2015, 3:46pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/4 "2015-01-19T15:46:43Z")
Hi @Herner,
I wonder if trying a power supply that could deliver more current might help? How about something like…
> **[12V DC 1000mA (1A) regulated switching power adapter - UL listed](https://www.adafruit.com/product/798)**
>
> This is a really nice power supply. It's a switching DC supply so its small and light and efficient. It is thin so it fits in power strips without blocking other outlets. The output is ...
Thanks!
David
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### Author:  [@Herner](https://community.particle.io/u/Herner)
#### Post date: [January 19, 2015, 10:43pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/5 "2015-01-19T22:43:42Z")
I will try just that I have a spare one I found that I can try rated at over 1
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### Author:  [@Herner](https://community.particle.io/u/Herner)
#### Post date: [January 20, 2015, 10:54pm UTC](https://community.particle.io/t/trouble-powering-core-through-relay-shield-solved/2786/6 "2015-01-20T22:54:53Z")
Just FYI that did work.