Raspberry Pi Forums

alphanumeric

If your powering extra bits like a hard drive, via the Pi's USB port. Be aware that it has a total current draw limit of 1.2A. Thats not per port, thats the total drawn across all the four ports. The sum total drawn through the for points cannot exceed 1.2A.

alphanumeric

I have one of these 5V 4A supplies https://www.adafruit.com/product/1466 and one of these 5V 10 A supplies https://www.adafruit.com/product/658 That I have used in some of my power hungry Pi setups. No undervolt warnings. Just be advised they use barrel connectors. You'll heed a connector and or ada...

alphanumeric

Or use the official Pi Foundation keyboard, which has a USB HUB built in. Then plug your Official Pi foundation mouse into the keyboard. :D What didn't you understand with the OP being tight on budget for tinkering? Pretty much everybody has a USB-hub laying in a drawer, no need to additionally pur...

alphanumeric

Unfortunately, the A models are not a low-cost alternative to the B models. That's an opinion that not everybody shares. The 4B requires adapters too, since pretty no monitor will provide micro HDMI connectivity. For that price you get a USB Hub (if you don't already have one laying in a drawer...)...

alphanumeric

Or use the official Pi Foundation keyboard, which has a USB HUB built in. Then plug your Official Pi foundation mouse into the keyboard. :D I have several Pi 3A+'s on the go. It's a nice cost saving over a 3B or 4B, especially for headless setups where you don't need all those extra ports. I use min...

alphanumeric

I've stacked multiple "Hats" with no issues. Technically they all aren't official Hats as per the standard though. The issue as I understand it is the reading of the ID EEPROM. If you stack two hats that both have an ID EEPROM neither one gets read, they interfere with each other. I have two Sense H...

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I've only ever used a 16x2 with an Arduino. Like what was used in the link you posted. Yours being a 128 x 64 DOTs may have something to do with it not working with his code?

alphanumeric

You have to install one. I do believe its

Code: Select all

sudo apt install matchbox-keyboard

Then launch it from the start menu. There are likely other ways to launch it once its installed, I don't know what they are though.

alphanumeric

Ok, its not a Smartipi case. There are other similar cases out there. Yours was made for a Pi 3. The Pi 4 has the USB and ethernet swapped around, it won't fit in a lot of the Pi 3 cases. The HDMI and USB cutouts will be different too. You could likely modify it to fit a Pi 4. You'd have to do some ...

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Your welcome. Thats one of those things that will annoy some of us to no end, but others will just ignore it.
A checkbox to turn it off would be nice. Or have it stop doing it after say a half dozen boot ups or something.

alphanumeric

This is the version 1 case https://www.amazon.ca/Case-Official-Raspberry-Touchscreen-Display/dp/B01HV97F64/ref=asc_df_B01HV97F64/?tag=bingshopdesk-20&linkCode=df0&hvadid=&hvpos=&hvnetw=o&hvrand=&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=&hvtargid=pla-4583589107801602&psc=1 And thi...

alphanumeric

What case and 7 inch monitor did you get?
I ask because I have a SmartiPi V2 case for my Pi Foundation 7 inch Touch Screen. It's compatible with a Pi 3 or a Pi 4. The older version 1 case will only work with a Pi 3.

alphanumeric

It was a good working card. It had been imaged several times with no issues. It just failed during use.
It was purchased from Adafruit.

alphanumeric

Adafruit has 1
https://www.adafruit.com/product/4295

alphanumeric

Yeah, I'm pretty sure you need a POT or resistor in there for the backlight.

alphanumeric

I found this a pretty good reference for this type of thing, what OS runs on what Pi etc.

https://en.wikipedia.org/wiki/Raspbian

alphanumeric

It has to be configured / setup to run. That doesn't happen all on its own. It appears to use SPI? You'll have to hunt up a driver / overlay and likely some Python of C code to make it work.

alphanumeric

It "was" a good card bought from a reputable source. I have other cards bought from that retailer in use with no issues. I had been using it for a while. It failed but etcher didn't pick up on it which left me scratching my head for a while. Anyway, just passing on my experience with that particular...

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Just be advised, if you have i2c enabled the dtoverly shutdown option won't work via GPIO 3.

alphanumeric

TBH, nothing as good as Etcher. I'm not so sure about that? It imaged and verified as Ok on a defective Micro SD card for me? Multiplt times. Win32diskinmager figured out the card was no good though. https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=258676 I'm still using it, just don't 100% ...

alphanumeric

Adafruit has a wide selection of GPIO connected small touch screens.
https://www.adafruit.com/?q=PiTFT

alphanumeric

If you solder a female header on the top of the phat or hat plugged in under the Pi Zero it will work. Not ideal if its a display though. ;) I usually do it the other way around, female on the bottom side of the zero, and male on the top of the pHat. That only works if they come as solder the header...

alphanumeric

My SmartiPi V2 case came with two different Y power cables. One for use with a Pi 3B and 2.5A power supply, and one for use with a Pi 4B and USB C 3A power supply. https://smarticase.com/ I have seen the Pi 3 Y cable available separately, https://shop.pimoroni.com/products/split-microb-usb-power-cab...

alphanumeric

As a workaround I've soldered female headers on the back side of a Pi Zero. That lets me plug them directly into things like this, https://shop.pimoroni.com/products/phat-stack?variant=658973392906 or this https://shop.pimoroni.com/products/mini-black-hat-hack3r?variant=19448025991 and not have to u...

alphanumeric

I've run my 7 inch touch with a Pi 3B+, 2.5A power supply, and Y power cable with no issues.
And my Pi 4B, 3A USB C power supply, and Y splitter cable with no issues.
My SmartiPi case comes with two different Y cables, One for use with a Pi 3B and one for use with a Pi 4B.

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