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by alphanumeric
Tue Oct 20, 2020 6:21 pm
Forum: Beginners
Topic: Power on / off button for Pi
Replies: 65
Views: 40150

Re: Power on / off button for Pi

The type of switch you want is a momentary contact (non latching), normally open. When pressed and only while being pressed the two contacts are shorted together. When released the contacts are an open circuit.
by alphanumeric
Tue Oct 20, 2020 11:29 am
Forum: Beginners
Topic: USB boot device
Replies: 10
Views: 445

Re: USB boot device

I just used the "latest" version of the Raspberry Pi Imager, to image my USB thumb drive. Before downloading and installing the latest version I got the same error message you got. I have what ever firmware you get via apt update apt upgrade.
by alphanumeric
Mon Oct 19, 2020 9:21 am
Forum: Python
Topic: Sense Hat scrolling text web front end
Replies: 6
Views: 183

Re: Sense Hat scrolling text web front end

That I can't help you with. I only display local info from its onboard censors on the LED matrix.
by alphanumeric
Sun Oct 18, 2020 6:58 pm
Forum: Beginners
Topic: USB boot device
Replies: 10
Views: 445

Re: USB boot device

Just a FYI post. Download and install the latest Raspberry Pi Imager to be assured your Pi 4B will boot from a USB device.
My first attempt failed even with the 2020-08-20 image file. After uninstalling and then installing the latest v1.4 Raspberry Pi Imager my 4B booted from my USB3 thumb drive.
by alphanumeric
Sun Oct 18, 2020 2:12 pm
Forum: Python
Topic: Sense Hat scrolling text web front end
Replies: 6
Views: 183

Re: Sense Hat scrolling text web front end

I'd have a look see here, https://pythonhosted.org/sense-hat/api/
Specifically the LED Matrix show_message section.
by alphanumeric
Thu Oct 15, 2020 7:19 pm
Forum: Compute Module
Topic: Compute Module 4
Replies: 19
Views: 14527

Re: Compute Module 4

Very rare occurrence to be sure, not a complaint, just an observation. I really don't mind the no comment, no comment, ow by the way its here =) I find it very encouraging that this thread hasn't been locked. If things stay on track and realistic, things like this can be very interesting to talk abo...
by alphanumeric
Thu Oct 15, 2020 6:54 pm
Forum: Compute Module
Topic: Compute Module 4
Replies: 19
Views: 14527

Re: Compute Module 4

I've been wanting to get a compute module for a while now. The release of a CM4 would do it for me to finally pull the trigger on one. Based on how much I'm liking my Pi 4B's. Thumbs up to the Pi Foundation for that. And another thumbs up for the 3A+. Other than Zero's I have more 3A's than any othe...
by alphanumeric
Thu Oct 15, 2020 6:40 pm
Forum: Beginners
Topic: Power on / off button for Pi
Replies: 65
Views: 40150

Re: Power on / off button for Pi

I'm not intending this to be sarcastic etc, but it works for me. Best guess is you don't have the switch wired up correctly.
I've done it multiple times on several different model Pi's with success. GPIO 3, GPIO 17, GPIO 26 etc.
by alphanumeric
Thu Oct 15, 2020 6:35 pm
Forum: Camera board
Topic: 16mm lens - loose focus mechanism?
Replies: 2
Views: 181

Re: 16mm lens - loose focus mechanism?

I'm not seeing this issue with mine, just FYI.
by alphanumeric
Thu Oct 15, 2020 6:19 pm
Forum: Beginners
Topic: Power on / off button for Pi
Replies: 65
Views: 40150

Re: Power on / off button for Pi

For clarification, the edit is done to config.txt, and you have to reboot at least once after doing it. And its GPIO 17, physical pin 11. For the boot up to work via GPIO 3, physical pin 5. The Pi is shutdown but left powered up. What are you using for a switch, and how have you got it wired? Ideall...
by alphanumeric
Thu Oct 15, 2020 11:16 am
Forum: Beginners
Topic: Power on / off button for Pi
Replies: 65
Views: 40150

Re: Power on / off button for Pi

dtoverlay=gpio-shutdown,gpio_pin=17,active_low=1,gpio_pull=up Is shutdown only, via a ground (low), being applied to GPIO 17 (BCM number). You can change the 17 to another GPIO. You can use active high too etc. I used GPIO 17 because that pin is grounded by the button on the Pimoroni Fan Shim, when...
by alphanumeric
Fri Oct 09, 2020 6:49 pm
Forum: General discussion
Topic: Pi Zero 2?
Replies: 9
Views: 333

Re: Pi Zero 2?

Good or Bad, the Pi Zero form factor (board size) is very restrictive. I initially thought that sentence was expressing criticism of the Zero form factor. Ie restrictive for the users. Took me a few readings of the whole post to realise the meaning was the hardship caused to its designers trying to...
by alphanumeric
Fri Oct 09, 2020 6:44 pm
Forum: Beginners
Topic: Raspberry Pi 4: operating temperatures
Replies: 4
Views: 145

Re: Raspberry Pi 4: operating temperatures

Yeah, the Pi's SOC will throttle back as its temperature hits 80c, too keep it from going above 80c. No harm is done to the SOC but your performance will decrease the more it throttles. I'm of the opinion that cooler is better. I run a fan on one of my Pi 4's and a heatsink case on the other. Neithe...
by alphanumeric
Fri Oct 09, 2020 6:32 pm
Forum: General discussion
Topic: Pi Zero 2?
Replies: 9
Views: 333

Re: Pi Zero 2?

Good or Bad, the Pi Zero form factor (board size) is very restrictive. Kudo's to the Pi Foundation for getting all that is currently there on it in the first place. And double Kudo's for squeezing WIFI in there for a Zero W. It is a fantastic bit of kit and IMHO a great value at the current price. I...
by alphanumeric
Fri Oct 09, 2020 4:14 pm
Forum: General discussion
Topic: Pi Zero 2?
Replies: 9
Views: 333

Re: Pi Zero 2?

The A series IMHO, pretty well fits that bill. Not much room to add anything on the Zero. I have several 3A+'s on the go here used where a Zero doesn't have the processing power for what I want to do. And when I don't need all the extra jacks on the B series. The Pi Foundation never announces future...
by alphanumeric
Fri Oct 09, 2020 12:20 pm
Forum: Troubleshooting
Topic: Led power button pcb
Replies: 4
Views: 148

Re: Led power button pcb

It would be a lot safer to use a ground signal as your turn off instead of a logic high. By default grounding GPIO 3 will have your PI boot up. If it was shut down and left powered. Adding dtoverlay=gpio-shutdown to your config.txt will have a running Pi do a safe shutdown when GPIO 3 is grounded. I...
by alphanumeric
Sun Oct 04, 2020 6:44 pm
Forum: Troubleshooting
Topic: Official touch screen not working.
Replies: 2
Views: 109

Re: Official touch screen not working.

Just a FYI post. Don't connect the other two jumpers included with the display. You only need the +5V, Ground, and the DSI cable.
by alphanumeric
Sun Oct 04, 2020 6:36 pm
Forum: Beginners
Topic: Help with finding how modules are connected to my Raspberry Pi GPIO pins
Replies: 3
Views: 146

Re: Help with finding how modules are connected to my Raspberry Pi GPIO pins

The Display is surprisingly (to me anyway) using i2c. Running i2cdetect -y 1 should get you its address. Look on the back side of the board for the driver chip. You might get lucky and find a library for it. If you have access to a volt meter you can likely sort out what pin each of the switches got...
by alphanumeric
Sun Oct 04, 2020 6:20 pm
Forum: Beginners
Topic: Help with finding how modules are connected to my Raspberry Pi GPIO pins
Replies: 3
Views: 146

Re: Help with finding how modules are connected to my Raspberry Pi GPIO pins

Looks like an event badge to me. I see them all the time on the Hack A Day site.
Don't let the name of that site scare you, its not what it sounds like.
https://hackaday.com/?s=event+badge
by alphanumeric
Sun Oct 04, 2020 9:19 am
Forum: General discussion
Topic: Metal case & WiFi
Replies: 21
Views: 779

Re: Metal case & WiFi

My fist Pi 4B would eventually hit 80c and throttle. Even in open air with no heatsink or case. The updates the Pi Foundation put out mitigated a lot of that, it still got hot but not hot enough to throttle. I'm of the opinion (Pi wise) that cooler is better for the SOC so I use a heatsink or a fan....
by alphanumeric
Sat Oct 03, 2020 9:29 am
Forum: Beginners
Topic: Obsolete OS updates ....
Replies: 22
Views: 712

Re: Obsolete OS updates ....

Why update to a new release and break it? Because incremental voluntary updates done at your leisure are usually a lot easier than when you are forced to update and you are generations away from the version you have to update to. It is like a lot of things in life. You have to either fully commit t...
by alphanumeric
Fri Oct 02, 2020 7:16 pm
Forum: Beginners
Topic: Obsolete OS updates ....
Replies: 22
Views: 712

Re: Obsolete OS updates ....

I use the latest release "when possible". There are times when there is a delay in making X program or App usable / compatible with the latest release. If what I have works with yesterdays release, but won't with the latest, guess what release I stay with, even if only temporarily. Plus I have many ...
by alphanumeric
Fri Oct 02, 2020 11:51 am
Forum: Beginners
Topic: GPIO pins
Replies: 6
Views: 231

Re: GPIO pins

I've used these a few times to get pin access. I use a stacking header if I want to plug something else in on top of the GPIO.
https://shop.pimoroni.com/products/protozero
by alphanumeric
Fri Oct 02, 2020 11:45 am
Forum: General discussion
Topic: Metal case & WiFi
Replies: 21
Views: 779

Re: Metal case & WiFi

I like the Pibow Cases. I have one 4B in a black Coupe case with a FanShim. It stays nice and cool. I also have a bunch of 3A+'s in Coupe cases with heatsinks. My other Pi 4B is in one of those heatsink cases. https://shop.pimoroni.com/products/aluminium-heatsink-case-for-raspberry-pi-4?variant=3092...
by alphanumeric
Fri Oct 02, 2020 11:35 am
Forum: General discussion
Topic: Picking the right Raspberry Pi
Replies: 4
Views: 211

Re: Picking the right Raspberry Pi

Are you just taking pictures with the camera? If yes the Zero should be fine. However if you plan on streaming video a Zero could be iffy. I ran Motion Eye OS on a Zero and the video stream lagged and stuttered a lot. I eventually went with a 3A+ and got good results. Mine are setup as surveillance ...

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