Questions tagged [hardware]

Questions relating to the physical components that the Raspberry Pi consists of.

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Multiple HDDs with Orange Pi NAS Expansion Board? [closed]

I know this isn't really a raspberry pi question but there isn't an orange pi stack exchange community and its pretty close. So anyway, I'm a total NOOB with orange pi and raspberry pi. I have never ...
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compiling hardware-accelerated VLC into YOCTO for Raspberry Pi 3

How does one achieve it to compile a hardware-accelerated (in this case via the Broadcom VC4) version of the VLC media player for the Yocto project? I already tried to install VLC via the local.conf ...
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pi4 4gb not powering XBOX one wireless dongle

I have a 2GB and a 4GB raspi 4 and the problem persists in both PIs Im trying to control my robot using the xbox one controller. I want to use the dongle instead of the bluetooth to get a bit more ...
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How is CPU in Raspberry Pi 4 +36% faster than for Raspberry Pi 3?

CPU benchmarks show that the Raspberry Pi 4 outperforms Raspberry Pi 3 by +36% https://www.geeks3d.com/20190930/raspberry-pi-4-vs-raspberry-pi-3-cpu-and-gpu-benchmarks/ How is this possible given the ...
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1answer
37 views

Use Raspberry with two devices that require 3.3v pin

I'm planning a project with an RFID reader that connects to the GPIO pins on a RPi2 and will use the 3.3v pin. Additionally I wanted to add an active buzzer, which also would require an 3.3v pin. Is ...
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How to connect “FPV Night Vision QVGA 320X240 Monocular” to raspberry 4?

I am working on a project which need this module to be connected with raspberry pi 4 or 3. I tried some to convert into single RCA cable (worked) but I want to convert it into HDMI. I am unable to ...
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46 views

Problem with DIY Smart Glasses Projection module

I am making Smart glasses which will display android app, click pictures, notifications and many more, and which is to be displayed on a small prism I searched a lot of posts online, many of then ...
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1answer
54 views

Raspberry Pi4 vs 4B--synonymous?

I am embarking on a cluster project using PoE hat. PoE hat is compatible with RPI4B. Vendor is selling "Raspberry Pi4." https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications shows only 4B, so I ...
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1answer
27 views

Raspberry Pi Connecting to 8 calculator screens

First of all I want to say that I am a complete noob with hardware so sorry if this question is stupid. What I want to do: I am designing a board game, in that game I want to have a raspberry pi ...
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Interfacing non bluetooth speaker with Raspberry Pi 3

I want a wired connection between speaker and Raspberry pi 3 Model B. Bluetooth or Wireless connection is not my requirement. Regarding my speaker - it should NOT simply output buzzer sounds but is ...
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How to install a Kuman 7" Touchscreen with Raspberry Pi

New to Raspberry and just experimenting for now. I bought a Kuman 7" touchscreen and got the display to work, but I am having trouble installing the matchbox touchscreen software. I moved the ...
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Which power supply should I get?

So I am using my raspberry pi 3 for octoprint as well as using it to run a Nas with an attached usb HDD. I am getting the undervolt/overtemp icon on octoprint and get "throttled=0x50000" when running ...
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C++ programming - Class for Motor rotation and control for washing machine embedded system device layer error?

#include <iostream> using namespace std; int main() { // declaring variables: int MotorControl; int MotorRotation; MotorControl = on; MotorControl = off; // process motor control and ...
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Pi motor HAT code question

I'm using a raspberry pi 4b and it's running Raspbian 10 (Buster). I have a Geekworm Pi Motor HAT Full function Robot Expansion Board. I'm using the GitHub code: Raspi-MotorHat-master. I'm using ...
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What's the best way to transfer data one-way from one Pi to another?

I would like to connect some sensors to one Pi and have it collect data from the sensors exclusively. This Pi will have only sensors and no display attached. Another Pi will act as a computer in ...
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Rpi AdaFruit python library controlling SPI MCP3008 of eTape Liquid Level Sensor problem

I have a rpi4 and have successfully replicated the project listed here using the eTape sensor (etape tutorial) I am satisfied with the performance using long breadboard and T-cobbler. In order to make ...
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Pigpio Hardware PWM callback is slow

I am trying to drive a servo motor with Raspberry pi. I have selected pigpio library to access GPIO. I need to send a specific number of pulses with a given frequency. But when I callback a function ...
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1answer
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Don't know how to connect multiple MCP23017

I need more pins on my raspberry pi 3 so that I can use it to manage the lights in my house. I am going to use relays and MCP23017. I need to know how to use 8 of the MCP23017 on my raspberry pi. If ...
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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 ...
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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. ...
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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 ...
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71 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 ...
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3answers
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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 ...
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1answer
58 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 ...
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1answer
71 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 ...
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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 ...
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57 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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:...
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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, ...
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1answer
127 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 ...
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2answers
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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 ...
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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 ...
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1answer
70 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 ...
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1answer
79 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 ...
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1answer
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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/...
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1answer
31 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 ...
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34 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 ...
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2answers
78 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 ...
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1answer
53 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
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76 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 ...
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31 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 ...
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2answers
37 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 ...
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67 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. ...
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2answers
170 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 ...
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99 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. ...
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1answer
170 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 ./...

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