Lorenzo1393
Posts: 1
Joined: Sat May 25, 2019 6:31 am

Need a new power supply

Sat May 25, 2019 6:46 am

I have a Raspberry Pi 3 B+ that I bought as part of a kit. However having used it for a little while I have noticed that the packaged power supply isn't providing the pi with enough power causing the under voltage symbol to be on the screen semi permanently.
I tested my pi with a power supply with output 5V-5.4A (2.4 per port) and random micro usb cable and it worked flawlessly (even with some pressure on it). However that setup doesn't include a switch.
So my question is can anyone recommend a power supply that will work under pressure that includes a switch?
I've tried to find one myself but I find Amazon's description/pictures don't match so struggling to find a reliable source.
Many thanks

Andyroo
Posts: 3769
Joined: Sat Jun 16, 2018 12:49 am
Location: Lincs U.K.

Re: Need a new power supply

Sat May 25, 2019 11:21 am

Not found one to buy yet. All the ones I’ve tried have thin string masquerading as wire :roll: I thought about using breakout boards and a switch but they where the wrong sex, a sacrificial cable with a different plug / socket or making one up (though my soldering is not great on small items) but gave up with all of these.

I ended up putting the Pi power supply into a replacement switched socket rather than pull the cable in and out and got one with USB charging in at the same time. (NO the Pi does not run off the sockets USB).
Need Pi spray - these things are breeding in my house...

User avatar
Imperf3kt
Posts: 2539
Joined: Tue Jun 20, 2017 12:16 am
Location: Australia

Re: Need a new power supply

Sat May 25, 2019 11:14 pm

You could use the official power supply and modify the cable.
Note that adding a switch will increase resistance and may cause low voltage issues.
If you want a power supply with a switch, the best is a wall wart that you switch on and off at the wall (AC side)
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PhatFil
Posts: 1305
Joined: Thu Apr 13, 2017 3:55 pm
Location: Oxford UK

Re: Need a new power supply

Sun May 26, 2019 12:25 am

fwiw I am a big fan of smart switches, provide any suitable PSU with mains power via a smart switch and you can send it a ' turn of in 90 seconds' command before executing a shutdown, and also wake the pi on demand too..

LTolledo
Posts: 1644
Joined: Sat Mar 17, 2018 7:29 am

Re: Need a new power supply

Sun May 26, 2019 9:08 am

Imperf3kt wrote:
Sat May 25, 2019 11:14 pm
If you want a power supply with a switch, the best is a wall wart that you switch on and off at the wall (AC side)
+1 on this

All my RPis are switched ON/OFF via the AC side , using an extension cord with switches per socket (6-socket with 6-switches)
or you can get a single-socket single-switch combo.....
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