RaspPI power issues with LCD

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

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greggh
 
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Joined: Tue Dec 17, 2013 11:07 pm

RaspPI power issues with LCD

Post by greggh »

Questions about these product for a raspberry pi.

I already have issues with power on this board just running the WI-FI dongle
that came with the kit I bought ( I

Will either of these work within the power constraints of the PI? Is there a
way to add separate power to these?

Adafruit Blue&White 16x2 LCD+Keypad Kit for Raspberry Pi
PiTFT Mini Kit - 320x240 2.8" TFT+Touchscreen for Raspberry Pi -

Also does the PiTFT have library that will monitor touch? The reason I
ask is that you are indicating tactile pins on the side. but I would like to use this for the entire UI ( which I need to take input).

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adafruit_support_rick
 
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Joined: Tue Mar 15, 2011 11:42 am

Re: RaspPI power issues with LCD

Post by adafruit_support_rick »

The PiTFT is a touch screen.
If you are having power issues, you should disconnect the WiFi dongle from the pi and connect it to the Pi through a self-powered hub.
The Pi maintains a USB power budget which is separate from the GPIO power budget. As I understand it, you should be able to use the LCD or PiTFT regardless of the USB power draw.

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