Questions tagged [hardware]
Questions relating to the physical components that the Raspberry Pi consists of.
881
questions
1
vote
1answer
29 views
How can I read the serial number directly from the broadcom chip instead of via /proc/cpuinfo?
There's numerous posts about reading the Pi's serial number from /proc/cpuinfo. I'm considering using the serial number as a unique id for licencing commercial software but am concercned that /proc/...
0
votes
1answer
17 views
USB or Pendrive are not detected in Raspberry pi 3B+ for data transfer
I want to copy a file raspberry pi 3B+ to my Desktop machine. I had plugged the USB pen-drive in raspberry pi 3B+. But pen-drive is not recognized. Did I missed anything as in case of pi?
Thanks in ...
0
votes
0answers
20 views
Finding source code for the Atmel MCU on the PoE Hat
I have recently purchased a raspberry pi 4. I have a small DC cooling fan for it, but I am limited to it being constantly on, which is annoying. I have seen (but do not need, or personally have access ...
1
vote
2answers
47 views
Which of those listed logic level MOSFET to choose for driving a heater
I'm planning to control 3 LEDs and a heating element (5 Ohms) using a Raspberry Pi.
The main power supply outputs 12V & 5A. Using an L78S05CV Voltage regulator, I'm planning to power the RPi. So ...
0
votes
1answer
35 views
Using a Raspberry Pi to write an image to an SD Card
Hie
I have an SD card Module and can access connect two SD cards to my raspberry pi, however i would like to be write an image in the other card connected to the SD Card Module
0
votes
1answer
44 views
Networking interfaces disappeared from my RPI 4B 4GB
Since receiving this Pi I've installed and configured Octoprint for my printer.
It ran fine without issues for 3-4 days, until I got disconnected when checking from work.
Once home I found the Pi in ...
0
votes
0answers
25 views
How to debugg kernel panics?
I have an Raspberry Pi V3 running as a home server for some years. Since a while ago, it doesn't run stable anymore, instead, after it is up for a couple of days sometime after a couple of hours, it ...
2
votes
2answers
31 views
Can I power two Pi from a single Lithium battery?
I need to run at least 2 Pi together, one controlling hardware and another sensing its environment. I would like to keep weight down by using a single LiIon battery. I have one to connect to a PiJuice ...
0
votes
0answers
26 views
Can I reduce the flicker in 480i composite video output?
Title pretty much says it all. Is there a way to reduce the line flickering of the Raspberry Pi's 480i composite signal when viewed on an interlaced CRT? Specifically regarding the Pi 3B hardware.
...
2
votes
1answer
69 views
GPIO pullups not working?
Sorry for the very basic question. I am trying to set a built-in pullup on GPIO pins and it doesn't seem to be working. Hardware is Pi 3B and 4B (I tried on both), OS is Raspbian 10 (buster). The ...
0
votes
0answers
47 views
Solder USB wifi right on to raspberry pi zero
I am trying to solder a wifi adapter right on to my raspberry pi zero so it takes up less space.
I've followed this video and some other diagrams on how to wire usb devices right on to the pi zero. ...
0
votes
1answer
113 views
Setup respeaker pi-hat 2 on RPI ZW
I am trying to run snips on my rpi0w, and has mounted the respeaker pi hat on to it.
Installed the driver using
git clone https://github.com/respeaker/seeed-voicecard
cd seeed-voicecard
sudo ./...
3
votes
1answer
63 views
Does directly connecting pins fry the Pi?
As a followup to this question: Can I safely connect two GPIO pins to each other (ie. for testing purposes)? And can I safely connect an input pin to either +VDD (3.3 V) or to Ground? Or do I need a ...
0
votes
0answers
26 views
Could my Pi have damaged my display?
I am using this display with my Pis.
Thanks to a tutorial they put some time ago, I have been able to control the brightness on the screen. Recently, I was testing some nodes on the Pi using a ...
0
votes
1answer
50 views
Not allowed to use internet in France?
According to the Declaration of Conformity, only indoor use is permitted. Is this just regarding the WiFi, or the whole Pi? What's the reasoning behind this?
1
vote
6answers
524 views
How to remotely turn off the cooling fan of an already software shut down Rpi?
I just bought a case with fa , as pi 4 is not working great without it. Now temperature is low, but as I have it in my room, I would like to turn it off while sleeping.
My fan is: https://www.amazon....
1
vote
1answer
51 views
ADF support for scanadf on HP scanner
I have installed SANE and I'm trying to scan pages with the ADF (automatic document feeder) of my HP ScanJet 8250. I found scanadf, but it does not use the ADF for scanning. I now read at the end of ...
1
vote
0answers
38 views
Is it still safe to use my pi? Missing component (capacitor?) near USB port
I dropped my pi and what I think is a capacitor has come off. What effect will this have on the USB ports, if any? Can I get away with just not using them?
-1
votes
1answer
92 views
Immutable SD Card? [closed]
Does there exist a device that goes in an SD card slot and behaves like a normal SD card, except that it can be made immutable?
I think it would have to have two modes:
Initial Setup would be ...
2
votes
3answers
81 views
Is there a piece of hardware I can use to turn an outlet on and off via a wired connection?
I'm new to Raspberry Pis. I'm not new to programming, but I know very little about electronics. For a first project I would love to make an outlet switch thing that is connect to an rpi that's connect ...
2
votes
0answers
85 views
Hardware controlled RTS on a Pi4 not working accurately
We need to use RS485 to talk to one of our custom tools. We need to use hardware controlled rts/cts. I've read so many articles about this but nobody ever says it works for them with fast timing and ...
4
votes
2answers
236 views
Rpi4B power connector SMD components damaged. How to replace it?
I broke what looks to be either a diode, capacitor or resistor on the board near the power connector of the pi 4B and I want to try to replace the surface mounted component. I know the chances are ...
3
votes
1answer
69 views
High level of noise of SPI pins on RPi Zero W
I have a zero W powered via USB from a laptop.
I have setup up for the SPI drivers and run a very simple test program which is:
import spidev
import time
spi = spidev.SpiDev()
spi.open(0, 0) ...
0
votes
0answers
20 views
Lego Mindstorm with raspberry as controller (only raspberry)
guys, I want to build a robot with a Lego Mindstorm set that I can use in school. The only problem is I hate graphical programming language and cant install ev3 python on it cause it´s not mine. but I ...
-1
votes
1answer
39 views
Why OS on raspberry are model specific?
Every time I want to install a OS on a Raspberry Pi I have to check if that version support the model I have.
For example, NetBSD doesn't support RP Zero and RP 4. (it doesn't even boot).
Of course ...
1
vote
1answer
102 views
Long range interface between a Raspberry Pi and a smartphone? [closed]
I would like to control a Raspberry Pi 4 with my smartphone (for my drone). Now I'm looking for an interface between the RPi and my Android phone.
Requirements:
Control with a web interface or app
...
0
votes
0answers
13 views
Unique Serial Number using Processing [duplicate]
How can I read the Unique Serial Number in Processing code ?
1
vote
0answers
57 views
How to read rPi camera hardware information that which type of camera sensor( imx219 or OV5647) is being used in camera module?
I want to read the camera hardware spec to ensure which type of camera sensor (like imx219 or OV5647 etc) is being used in the rPi camera module for camera module v1 and v2.
Is there any method to ...
1
vote
1answer
51 views
Composite video on Compute Module
I'm working on a Compute Module design that uses the composite video output. I know the Zero and presumably the full size Pi have some passive components on the output pin, but I'm not sure what of ...
0
votes
1answer
40 views
Running multiple programs that use the same UART bus
Let's say we're writing two programs that uses both UART bus.
The program A uses UART at 9600bps baud rate, and the program B uses UART at 115200bps baud rate. Can both of them operate concurrently ...
0
votes
0answers
22 views
(ENC28J60) Is the PHCON1.PDPXMD register set by the driver?
I am trying to add an ENC28J60 (ethernet controller with SPI interface) to my Raspberry Pi Compute Module board. In section 2.6 the datasheet explains that the full duplex / half duplex mode is set by ...
0
votes
1answer
32 views
Is my ClusterHat faulty or my RPi GPIO fried?
I've been using a ClusterHat (1RPi + 4 PiZeroes) and all has been well until recently.
The PiZeros boot off the RPi's SD card using the ClusterHAT-2018-10-09-lite-1-usbboot boot image, and when I ...
1
vote
3answers
41 views
Can I safely add a switch between a fan connected to power/ground?
I've just got a small 5V fan for my Pi, but it is very loud, and I'd like to be able to switch it on/off.
Currently, the fan is just wired to 5V power and ground.
I know that I can use the GPIO pins ...
2
votes
0answers
109 views
Second WiFi adapter for the Raspberry Pi 4 B
I need a second WiFi adapter for the Raspberry Pi 4.
For RPi <=2 (without integrated WiFi) and with RPi >= 3 the chipset BCM43143 was recommended.
Does this still apply for the RPi 4? Can I only ...
2
votes
2answers
125 views
Can I drive a custom LED matrix from my Pi
I have an idea for a project, but I am unsure of the best route to take.
I am going to create a custom 11x10 LED matrix (addressable LEDs like WS2812) with the intention of lighting up certain LEDs ...
2
votes
1answer
57 views
Correct use of heatsink tape [closed]
With my Rpi 3B+, I got a heatsink kit, RS Stock No. 867-9039. Two large heatsinks and one small, and a short length of kind of tape stuff, with the 3M logo and what looks like the word "Adhesive" ...
2
votes
2answers
52 views
Is there a way to physically disable wireless networking capabilities?
I'm looking to create a cheap air-gaped computing device to store and utilize sensitive data like cryptocurrency wallet addresses or PGP keys. Now, I'm a total newb when it comes to Raspberry Pi but ...
0
votes
0answers
27 views
Audio noise generator
Is there a package or hardware for a Pi that will generate real audio noise ie noise whose average over time doesn’t tend to a fixed value. White noise won’t do, since it’s average tends to zero.
3
votes
1answer
330 views
Can the Raspberry Pi 4 better distribute Python scripts to all four cores?
This relates to previous questions regarding the GIL (Global Interpreter Lock) for Python on the Raspberry Pi. My question has to do with the new processor on the Pi 4 - does it still have the same ...
1
vote
1answer
46 views
How do I know my PCF8951 is not broken?
I am using some PCF8951 board like this:
I remove all the jumper, like this:
This is every thing:
Then I plug two senor board to this board. Everything plugs into AIN0 will get the correct value. ...
4
votes
5answers
1k views
How to monitor if a remote Rpi freezes and reboots it, using a watchdog timer or otherwise
I'm building a system with a raspberry pi located in a very remote area connected to internet with an internet stick. The tests are promising so far but the pi freezes every here and then and I'm not ...
0
votes
0answers
21 views
micro-sd-card will not stay in. How can I rectify
The micro-sd-card will not stay in by Pi. It is pushed out by the spring. I think that the latch must be broken.
Is there a way to fix it, so that the SD-card stays in?
Model: Raspberry Pi 2 Model B ...
0
votes
0answers
45 views
FTDI USB Serial Device converter now disconnected from ttyUSB2
---Setup---
1) We are evaluating using Raspberry Pi Compute Module CM3.
2) USB-HUB and USB-UART are boarded on the IO board.
3) USB-HUB is working in Self-power mode.
4) VBUS-detect of USB-HUB uses ...
0
votes
3answers
179 views
MCP3008 minimum current(resistors value)
I want to measure some battery voltage in a range 0V-4.2V with MCP3008(VDD=VREF=3.3V).
I used a voltage divider with R1=2.7MOhm and R2=8.2MOhm, but it didn't return correct value, I used resistors ...
2
votes
2answers
253 views
Raspberry Pi Zero W solar power setup
Good day,
I have a Raspberry Pi Zero W that I would like to deploy onto a tower that is supplied with 12VDC power from a photovoltaic solar panel.
I'm currently looking at powering the Pi Zero W ...
-1
votes
1answer
49 views
How to connect a M24 Multi Pin Connector to a Raspberry Pi
How do i connect a M24 Multipin Motor Plug Wire that is coming from a brushless motor to a raspberry Pi , I know i need to use an ESC however the wires attached to my brushless motor is a multipin ...
2
votes
0answers
60 views
Trouble connecting USB devices with Raspberry Pi Compute Module on custom PCB
I am working with a team designing a PCB that works with the Raspberry Pi Compute Module 3 card. We are having a bit of trouble with the USB ports. The schematic of the USB portion is somewhat similar ...
0
votes
0answers
46 views
Raspberry Pi 3B+ No Boot (Hardware Failure?) [duplicate]
Between two identical out of the box RasPi's 3B+ (same supplier and model), one of them boots flawlessly with SD Card running 2019-04-08-raspbian-stretch but the other refuses too with all the same ...
1
vote
3answers
70 views
Raspberry Pi 3 Model A+ Faint green pinprick light steady flashing
I just loaded an SD Card with Raspbian lite for the Pi3 Model A+.
It does the normal rainbow screen splash, followed by the 4 raspberries and a blinking cursor underneath. The pi never completes its ...
1
vote
3answers
179 views
Raspberry PI automatically turning on after I put it to sleep using GPIO
I implemented a simple script (well, someone else created it, just installed it hehe) to shutdown my raspberry pi when a button is pressed that connects pin 5 and 6 (I think those are the numbers - ...
