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by alphanumeric
Sat Oct 05, 2019 9:16 pm
Forum: General discussion
Topic: Power multiple Raspberry Pi 4 B
Replies: 14
Views: 711

Re: Power multiple Raspberry Pi 4 B

I just curious why just because it says "recommended" 3A for a Pi 4 that its assumed that is actually needed as a minimum per Pi 4? 600ma is the > Typical bare-board active current consumption for a Pi 4B. Thats less than a third of the 3A recommended. https://www.raspberrypi.org/documentation/faqs...
by alphanumeric
Sat Oct 05, 2019 9:14 pm
Forum: General discussion
Topic: Power multiple Raspberry Pi 4 B
Replies: 14
Views: 711

Re: Power multiple Raspberry Pi 4 B

Just FYI, you don't have to power the Pi 4B via the Micro USB port. You could feed power in via the GPIO +5V and ground pins. There is no real need to feed power to the Pi 4, or any Pi, from a USB port. On some older models this will bypass the poly fuse, so just keep that in mind. If your making up...
by alphanumeric
Sat Oct 05, 2019 9:01 pm
Forum: General discussion
Topic: Power multiple Raspberry Pi 4 B
Replies: 14
Views: 711

Re: Power multiple Raspberry Pi 4 B

I just curious why just because it says "recommended" 3A for a Pi 4 that its assumed that is actually needed as a minimum per Pi 4? 600ma is the > Typical bare-board active current consumption for a Pi 4B. Thats less than a third of the 3A recommended. https://www.raspberrypi.org/documentation/faqs/...
by alphanumeric
Fri Oct 04, 2019 9:24 am
Forum: Advanced users
Topic: 3.5" display that have extra GPIO pins for use
Replies: 5
Views: 338

Re: 3.5" display that have extra GPIO pins for use

I have one of the original Black Hat Hack3r boards and a couple of the Mini Black Hat Hack3r boards, the pHat stack is on my wish list for future purchases. https://shop.pimoroni.com/products/mini-black-hat-hack3r?variant=19448025991 If you solder a female header on the bottom side of a Pi Zero, you...
by alphanumeric
Thu Oct 03, 2019 7:35 pm
Forum: Advanced users
Topic: 3.5" display that have extra GPIO pins for use
Replies: 5
Views: 338

Re: 3.5" display that have extra GPIO pins for use

If you mount a Proto Hat https://www.adafruit.com/product/2310
with a stacking header https://www.adafruit.com/product/1979
Between your Pi and display you can access any unused GPIO pins.
You'll also need these standoffs https://www.adafruit.com/product/2337
by alphanumeric
Wed Oct 02, 2019 8:26 am
Forum: Beginners
Topic: Components and Pins
Replies: 14
Views: 726

Re: Components and Pins

Yeah, the long solderless breadboards are often laid out like two small ones end to end, with a break in the middle.
In the old days you'd have +Vcc on one end and -Vcc on the other end. Nowadays most just jumper it so its one long power rail.
Also a retired electronic technician.
by alphanumeric
Tue Oct 01, 2019 7:20 pm
Forum: Beginners
Topic: Components and Pins
Replies: 14
Views: 726

Re: Components and Pins

https://en.wikipedia.org/wiki/Breadboard The solderless breadboard should have two power rails down each side. Two rows of connected pins. I would wire / jumper +5V and ground on one side and 3.3v and ground on the other side. The two grounds will be common so no need to connect them together. You ...
by alphanumeric
Sun Sep 29, 2019 9:26 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201718

Re: Raspberry Pi 4 temperature

Now that you mention it, I do remeber seeing issues with the original (non Micro) friction fit SD card slots. Loss of connection on some pins or something? I never owned a Pi with that card holder. And some issues with the click in, click out, slots. I have some Pi's with those, A+'s. Working fine f...
by alphanumeric
Sun Sep 29, 2019 9:04 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201718

Re: Raspberry Pi 4 temperature

Most of the broken card holder posts I've seen were the result of not removing the card, before trying to remove the Pi from a case. The card edge hooks on the case and the card and or holder gets broken in the process.
by alphanumeric
Sun Sep 29, 2019 7:33 pm
Forum: General discussion
Topic: Pi Zero vs Zero W - power consumption (or A+?)
Replies: 11
Views: 614

Re: Pi Zero vs Zero W - power consumption (or A+?)

The A+ does not have WIFI, so I would expect it to be similar to a Zero with USB ethernet. It does have a full sized USB port though. The 3A+ has WIFI but is going to use a fair bit more power. https://www.raspberrypi.org/documentation/faqs/#pi-power I use this with my Zero's https://shop.pimoroni.c...
by alphanumeric
Sat Sep 28, 2019 3:19 pm
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201718

Re: Raspberry Pi 4 temperature

jamesh wrote:
Sat Sep 28, 2019 1:08 pm
Boot eeprom information

https://www.raspberrypi.org/documentati ... teeprom.md
Thank you very much for that info. Very very useful IMHO. :D
by alphanumeric
Thu Sep 26, 2019 11:57 am
Forum: Beginners
Topic: Using GPIO Pins that are blocked from a touch screen
Replies: 2
Views: 124

Re: Using GPIO Pins that are blocked from a touch screen

I do it quit often. I usually mount a Proto Hat on a stacking header between my Pi and my Hat. Then feed what ever signals I need to my breakout boards from the Proto hat.
https://www.adafruit.com/product/2310
https://www.adafruit.com/product/1979
https://www.adafruit.com/product/2337
by alphanumeric
Thu Sep 26, 2019 11:52 am
Forum: Beginners
Topic: 5 quy tắc quản lý tài chính cá nhân cho năm 2020
Replies: 4
Views: 153

Re: HDMI to DVI?

HawaiianPi wrote:
Thu Sep 26, 2019 11:07 am
Yes, I ran my Pi 3B for quite awhile on an old Acer monitor with an HDMI cable and an HDMI-DVI adapter. Worked great.

HDMI-DVI.jpg
Thats the way I went, it lets me swap the official cables depending on what Pi I'm using with that spare monitor.
by alphanumeric
Tue Sep 24, 2019 8:57 pm
Forum: General discussion
Topic: Pi4: Are HATs practical anymore?
Replies: 3
Views: 293

Re: Pi4: Are HATs practical anymore?

My RTC boards are mounted to Proto Hats. https://www.adafruit.com/product/2310 With a stacking header I can then mount another Hat on top of them. https://www.adafruit.com/product/1979 Not 100% sure what I'm going to do Pi 4 Wise though. My fan shim is currently soldered to a header. I could plug a ...
by alphanumeric
Mon Sep 23, 2019 7:10 pm
Forum: Beginners
Topic: can i plug old monitor's built-in speakers into the pi3?
Replies: 6
Views: 216

Re: can i plug old monitor's built-in speakers into the pi3?

And people have just bought bare speakers, with the intent to mount them in a project and discovered they need an amplifier to drive them. Like these, https://www.adafruit.com/product/1669 I have a set, I used this to drive them, https://www.adafruit.com/product/987
by alphanumeric
Mon Sep 23, 2019 7:01 pm
Forum: Beginners
Topic: power on raspberry pi 4 when it gets power
Replies: 4
Views: 221

Re: power on raspberry pi 4 when it gets power

All my Raspberry Pi's boot up as soon as I plug in the power supply? If the power goes off, and then comes back on, they just boot up again. If your SD card gets corrupted when the power fails they won't recover, is that what your wondering about?
by alphanumeric
Mon Sep 23, 2019 9:11 am
Forum: General discussion
Topic: Back Voltage from USB Hub
Replies: 19
Views: 911

Re: Back Voltage from USB Hub

I kind or skimmed through this thread but want to mention something I think is relevant. If it has already been mentioned my apologies. The Pi Zero was designed to be able to be back powered though the USB Data port. It's so USB gadget mode works with just the one USB cable and no need for a separat...
by alphanumeric
Mon Sep 23, 2019 9:00 am
Forum: Camera board
Topic: Raspberry Pi Camera Live View
Replies: 4
Views: 262

Re: Raspberry Pi Camera Live View

Ok, thanks, I had a feeling it was going to be something easy like that. 6 AM here, should have waited till latter in the day for this stuff, lol. I had tried something like this in the past but could not for the life of me make it stop? I ended up power cycling the Pi to get out. I had started it v...
by alphanumeric
Mon Sep 23, 2019 8:46 am
Forum: Camera board
Topic: Raspberry Pi Camera Live View
Replies: 4
Views: 262

Re: Raspberry Pi Camera Live View

Going to try that, one question though. How do you stop it and go back to your desktop?
by alphanumeric
Mon Sep 23, 2019 8:02 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201718

Re: Raspberry Pi 4 temperature

Try the recovery option on this page.
https://www.raspberrypi.org/downloads/
by alphanumeric
Sun Sep 22, 2019 10:19 pm
Forum: Advanced users
Topic: RaspberryPi 4: heatsink or fan
Replies: 83
Views: 35684

Re: RaspberryPi 4: heatsink or fan

Define normal usage? My 4B routinely hit 80c with just a browser window open to one of my surveillance camera network feeds. Heatsink no fan Pibow coupe case . Room temperature was around 24c. Is that your PiBow case perhaps? My 4B is at 50C just using the browser. About 20C ambient. Its a pretty o...
by alphanumeric
Sun Sep 22, 2019 10:06 pm
Forum: Official Foundation Display
Topic: Choosing a case with correct screen orientation
Replies: 11
Views: 2160

Re: Choosing a case with correct screen orientation

Edit the config.txt file to rotate the LCD screen 180 degrees. Documentation - Configuration - Config.txt - Video Scroll down to the section "LCD display/touchscreen options" for the lcd-rotate for values to rotate the image 0, 90, 180, or 270 degrees. Note this setting does not affect the HDMI or ...
by alphanumeric
Sun Sep 22, 2019 10:00 pm
Forum: Advanced users
Topic: RaspberryPi 4: heatsink or fan
Replies: 83
Views: 35684

Re: RaspberryPi 4: heatsink or fan

Define normal usage? My 4B routinely hit 80c with just a browser window open to one of my surveillance camera network feeds. Heatsink no fan Pibow coupe case . Room temperature was around 24c.
by alphanumeric
Sun Sep 22, 2019 7:50 pm
Forum: Raspbian
Topic: does not boot
Replies: 12
Views: 335

Re: does not boot

One word

WHY? :?
by alphanumeric
Sun Sep 22, 2019 7:36 pm
Forum: Official Foundation Display
Topic: Choosing a case with correct screen orientation
Replies: 11
Views: 2160

Re: Choosing a case with correct screen orientation

I define right way up as not having to edit the config.txt file to flip whats displayed. ;)

https://smarticase.com/products/smartipi-touch-2

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