Questions tagged [hardware]
Questions relating to the physical components that the Raspberry Pi consists of.
901
questions
0
votes
1answer
16 views
Setting permission for Ultimate GPS HAT from inside Sticky Finger's Kali Pi
I'm running Sticky Finger's Kali Pi on a Pi 2 with the Adafruit Ultimate GPS HAT connected.
The HAT is accessible from the OS under /dev/ttyAMA0, but the permission is set to root:tty rw--w---. With ...
11
votes
1answer
2k views
Raspberry PI 3B. Wifi and bluetooth shared antenna?
I'm working on a project that involves WiFi and BLE, and for this I would like to use an esp32 due to its lower price, but there will be timing issues since the wifi and Bluetooth antenna are shared.
...
1
vote
0answers
24 views
Raspberry Pi Zero(s) not booting up consistently
I have three Raspberry Pi Zeros (1.3), all between 3 and 4 years old. On two of them, it usually takes several tries of connecting and disconnecting power to get them to turn on. In about 1 out of 5 ...
1
vote
1answer
52 views
How to go from prototype to production
This question deals with Raspberry Pi but it is not limited to it.
I have build some prototypes using Raspberry Pi. They work well. What should I do if I want to transform my prototypes into ...
2
votes
3answers
49 views
Ribbon Cable for bridging the headers of Raspberry pi and Custom hats
Hello I am in need of a ribbon cable for my custom pi hats. The problem with ordinary ribbon cables such as this
I could not make it to align the rows of the pins will get swapped because of the ...
2
votes
1answer
47 views
How to manually control a shake activated lamp using raspberry pi?
I got this cool potion lamp for Christmas though it’s only shake activated (more like you have to tap on it really hard) and I was wondering if there was any possible way I could connect my raspberry ...
3
votes
1answer
61 views
Power off Raspberry Pi if charger of powerbank is connected and turn back on if disconnected
I have a (maybe trivial) problem.
I want to power a Raspberry Pi (more specific a SteroPi) with a power bank. The power bank has the feature, that its output is always on. So even if I plug in a ...
0
votes
0answers
9 views
Raspberry Pi 3 Model B+ and Unity3D
I have a project which is aiming to connect sensors to Unity3D by means of Raspberry Pi 3 Model B+. Therefore, my question is:
How can I send the data collected from the sensors by Raspberry Pi 3 ...
0
votes
0answers
20 views
Virtual register address translation on the raspberry Pi 4
When taking a look at the manual of the BCM2835 (which seems to be the correct one for the BCM2711), we can see, for example, that the base address of the SPI device is 0x7E204000 (page 152). Assume ...
1
vote
0answers
39 views
AC Frequency Monitoring
There are multiple hardware solutions to do amp/current monitoring, but I cant seem to find one to do AC Frequency monitoring. Anyone have a pointer to board that can handle line power and return line ...
1
vote
0answers
17 views
Infrared Camera Project: Is the following possible?
first post here/new raspberry pi user. I'd like to use the raspberry pi with the FLIR infrared camera in order to create a display-less security camera that will set a wireless alarm if a temperature ...
0
votes
0answers
13 views
keyboard problem
When I first plugged in my raspberry pi 4 it came with a german keyboard, not an English one. I have got the English one now, but whenever I type with it, the letter E randomly gets put into the word ...
1
vote
0answers
39 views
Is there an official mega list of compatible modules?
I'm interested in Raspberry Pi and I wonder what hardware modules are compatible with it.
How does compatibility work? Do people design parts that work with the Raspberry Pi? Or is it like an ...
1
vote
0answers
92 views
MCP3008 outputting just 0
I've been messing with raspberry pi, and I am learning about interfacing it with analog devices. I am using the MCP3008 for that and following this tutorial here. I wired it up like the pictures below:...
0
votes
0answers
68 views
Relay keep on question - probably a bash problem now
I have a pi 3B and a relay board - "5V relay module is active LOW, meaning that LOW level will activate the relay on and HIGH level will deactivate it." .
I have connected 5V to Vcc on the relay, ...
1
vote
1answer
115 views
RJ11 hardware for Raspberry Pi (RasPBX)
I'm trying to build an IVR system using Raspberry Pi. See following diagram
I'm not sure which hardware to use for blue and green boxes.
For the blue box maximum number of phones will be 3. They are ...
1
vote
2answers
57 views
Whenever I restart my Raspberry pi 4, GPIO pin number 3 goes high and low very fast (bug in pi?)
I just switched from Raspberry Pi 3 to 4, which I use to control some devices. I just discovered that whenever Raspberry pi 4 boots, it changes the pi state of GPIO pin number 3 very fast from low to ...
0
votes
0answers
38 views
Cooling fan sudden alarming erratic behavior
Help needed understanding if this is an emergency or not...
Anyone familiar with raspberry pi 5V powered micro fans.
SKIP TO THE END for the tl:dr but here is a detailed description:
I have a tower ...
1
vote
1answer
62 views
I have 2 Pi 4Bs. One is giving me the rainbow screen, other is working fine. Is it irreparably broken?
I have 2 identical 4Bs: the one older one that used to work and the new one I ordered yesterday.
With all the same cables and SD card, the new one works fine, the other one is giving me the rainbow ...
1
vote
1answer
68 views
Unable to control and count RPM of 2 motors in single python code in raspberry pi
I'm trying to count rpm of dc and controlling its rpm using PID controller motor which I have done successfully in my code as shown below.
But when I try to count RPM of 2 DC motors simultaneously in ...
1
vote
1answer
37 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/...
-2
votes
1answer
30 views
Bootable USB or Pendrive are not detected in Raspberry pi 3B+ for data transfer or format
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
26 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
61 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
43 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
60 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
28 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
35 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
42 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
106 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
71 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
131 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
69 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
1k 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
81 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
40 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
96 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
84 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
125 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
323 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
96 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
22 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 ...
0
votes
1answer
40 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
161 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
14 views
Unique Serial Number using Processing [duplicate]
How can I read the Unique Serial Number in Processing code ?
1
vote
0answers
75 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
58 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
44 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 ...
