How to power espruino board without battery

[espruino-discuss3]

Posted at 2016-11-30 by gcontaldi

Hi, I would like to use Espruino in a hydroponic system. So I need it to read some sensors and control some relays. I am a beginner with Espruino and as far I understood the right way of supplying power is through a battery, but this is not the ideal scenario for me. I would like to use something like a phone charger. Do you know if it is possible?

Thanks

[espruino-discuss3]

Posted at 2016-11-30 by @allObjects

Any USB 5V phone charger can be used and plugged in to power the device.

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Posted at 2016-12-01 by @gfwilliams

As @allObjects says, that's totally fine. The only reason we suggest battery is that it allows you to also connect USB so you can debug and communicate with the board while it's running. Otherwise using a phone charger isn't a problem - I do it all the time here.

The only gotcha is it needs to be a 5v charger - or close (which 99.99% of them are). Someone did manage to put 8v on the USB connection once, and that can damage the chip.

Another option is to use a phone charger/power supply and connect it to the GND and Bat_in pins (as if it was a battery). That's fine too, allows you to use any voltage between 3v and 15v, and also means you can connect via USB if you need to.