Can I power a Raspberry Pi directly through a 5V pin on the 40 pin header instead of micro USB?

Question

I'm thinking of powering my Raspberry Pi 3 via any of the two 5V pins on the 40 pin header using a 9V battery and a 5V regulator IC.

Is it possible? Are the 5V pins directly connected to the main power line? Are they capable of safely taking a current around 1 amps? Is it dangerous?

Another question: If I supply 6V instead of 5V to the pins, will the board burn out?

Sorry it's a lot of questions. But I'm clueless, and desperate to know the answers.

Thanks

Answer 1

https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf



You need a FUSE.

You need a heat sunk LDO regulator for batteries/power supplies less than 8 Volts, or a regulated 5V supply.

You need more current than you can get from a 9V battery,



There is a Zener diode on 5V which will be the first thing to blow if you go over 6.4V.

http://www.newark.com/littelfuse/smbj5-0a/tvs-diode-600w-5v-do-214aa/dp/72K7315?mckv=LRzAQp3D_dc|pcrid|77446861935258|plid|{placement}|kword|smbj5.0a|match|e&CMP=KNC-BUSA-SKU-MDC&msclkid=88744871994017f71a9513774c4c1cab

Answer 2

Yes, You can.

Rasberry Pi 3B GPIO connector

Vcc=5.0v pins 2 & 4

Gnd= pins 6,9,25 & 39.



A 9v ANSI 1604 battery will not supply 1 A. It can supply ~ 500mA for ~1 hour.

A three terminal regulator will need ~8 V to stay in regulation. You can use a 12V Motor cycle Battery and the regulator or a switching regulator on a 6V Lantern battery. Much depends on what the Load current is and how long you need it to run.

If you run it with 6v you will burn up, Zener regulator diode, D1.

Do not power external loads from the GPIO Port.

Maximum current is 2.5A. More than that can damage the board.

There is a users forum for using a Rasberry Pi online.

Google :https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus/

Answer 3

I'd be worried the traces or pins on the header can't handle the current. Various models need different levels of current, with the max being about 1.4 amps.



Instead, take a micro USB cable, cut it in half, pull out the wires and connect the proper ones to your 5 volt source. Use a voltmeter to be sure you get the proper pins before you plug that into your Raspberry Pi. That way you don't modify the circuit board. PS: you can find the pins and their connections on line.



But you need something more powerful than a 9v battery. That can deliver 500 mA max for about 10 minutes.



Use a 6v lantern battery and a switching type 5 volt regulator that will run with 6 volts input.



6 volts will damage the board. Spec is 5 volts ±0.25 volts, usually.

Answer 4

Should be OK but as Marcus says, a PP3 9V battery won't cut it.

You would damage the Pi if you provide 6V instead of 5V.

Answer 5

You won't get 1 Amp from a 9 V battery...

Answer 6

69v pins for the win! sorry dude no idea what u asking haha just had to write that