power requirements

[chris_c]

What's the maximum draw of the LCD + interface board ?

by the time you have pi2 @1ghz, keyboard, mouse, etc all plugged it I'm thinking to allow any kind of wiggle room probably a 4A power supply would be likely needed (as estimate only) I'm certainly seeing warnings with a 2A supply

While I could use a powered usb hub to take the pressure off I'd rather keep it all more portable and just have the one supply

Any ideas or thoughts on the best way to amply(sorry!) power everything

[gsh]

We would suggest you buy the Raspberry Pi official power supply, this is a 2.5A power supply with large gauge wiring to reduce the voltage drop on the cable.

This should be ample for Pi 2 + USB peripherals and display

Gordon

[W. H. Heydt]

What's the maximum draw of the LCD + interface board ?

by the time you have pi2 @1ghz, keyboard, mouse, etc all plugged it I'm thinking to allow any kind of wiggle room probably a 4A power supply would be likely needed (as estimate only) I'm certainly seeing warnings with a 2A supply

While I could use a powered usb hub to take the pressure off I'd rather keep it all more portable and just have the one supply

Any ideas or thoughts on the best way to amply(sorry!) power everything

The polyfuse on the A+, B+ and Pi2B is going to limit the board to 1.8A. Someone posted that the display+controller draws 0.43A, so anything over about 2.2A isn't going to be used no matter what you do.

[fruitoftheloom]

We would suggest you buy the Raspberry Pi official power supply, this is a 2.5A power supply with large gauge wiring to reduce the voltage drop on the cable.

This should be ample for Pi 2 + USB peripherals and display

Gordon

https://www.raspberrypi.org/products/un ... wer-supply

[chris_c]

is it possible to power the interface board separately to the pi ?

while the fuse on the PI may limit whats drawn from the pi, the powers connected to the interface, so the .4+A isn't going through the poly fuse?

I'm looking at something like this to drive everything (including small usb powered hub) but would ideally like the all stuff getting their own power rather than the lcd interface board powering the PI and then the PI powering all the USB stuff - that way hopefully I can nail it all down into some kind of (carry?) case powered with just one plug

[W. H. Heydt]

is it possible to power the interface board separately to the pi ?

while the fuse on the PI may limit whats drawn from the pi, the powers connected to the interface, so the .4+A isn't going through the poly fuse?

I'm looking at something like this to drive everything (including small usb powered hub) but would ideally like the all stuff getting their own power rather than the lcd interface board powering the PI and then the PI powering all the USB stuff - that way hopefully I can nail it all down into some kind of (carry?) case powered with just one plug

The controller and Pi can be powered independently. While I haven't actually looked, I would be *very* surprised if the controller board lacks overvolt/overcurrent protection. It would be very poor design to neglect that sort of thing, and the RPF is noted for good design...even if a bit *too* protective at times (remember the 140mA polyfuses for the USB ports on the original version of the Model B?).