Questions tagged [hardware]

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

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14 views

Which bipolar stepper motor can be used with EasyDriver4.5V A3967?

I have EasyDriver 4.5V A3967 driver and planning to purchase 12V bipolar stepper motor with specs phase: 2 phase voltage: 12 V current: 0.7 A. Phase resistance: 4.0 ± 10% Ω phase inductance: 3.2 ± 20% ...
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2answers
44 views

16 Channel Sainsmart relay board connected to raspberry pi zero w, hydrosys4 app not stopping relay / turning off relay

Within the Hydrosys4 app Settings page in the actuators test section I can set the app to pulse the GPIO and I get the LED indicator on the relay board and the relay engagement but the relay does not ...
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1answer
262 views

Sainsmart 12V, 16 Channel relay module connected to RpiZW has unwanted triggering when booting

I'm trying to get the hydrosys4 open source irrigation control software to work with my 16 channel relay board and raspberry pi zero w. When the pi boots up the relay is triggered multiple times, ...
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1answer
28 views

I2C communication error: OSError: [Errno 121] Remote I/O error while using PAJ7620 sensor

I know this question has been asked a bunch of times. But, none of the answers was able to resolve my problem... I'm hoping I could get some guidence from awesome people in this community. Thanks in ...
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1answer
20 views

any way to know the real time status of speaker is it playing any sound through cli?

Recently i want to create a service on my pi which additional logic, one service needs to be stopped when the speaker is playing any sound. Any way i can get the status like a system log file about ...
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21 views

Popping sound Adafruit MAX98357 with Raspberry

I have a problem using MAX98357 Audio Amp from Adafruit with Raspberry Pi 3 B+. Every time a new sound begins, there is a popping noise that comes out of the speaker. I tried to do the fix that they ...
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25 views

Can I use the Sixfab 3G-4G/LTE Base HAT while also using this I2C Shield with my raspberry pi 4?

I am trying to create a remote weather station but have a problem, apparently I need a HAT that will cover my GPIO pins as well as a I2C shield to connect to my weather monitoring hardware. ...
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1answer
56 views

Correct way to wire resistors

I have a project where I use pins of PCF8574 expander placed on a breadboard and which is connected to Raspberry Pi. Pins of the expander should be connected forward to the ones of STM8 ...
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1answer
35 views

Can I connect over 15 Bluetooth devices with raspberry Pi 4B 4GB ram using usb Bluetooth apapters

I have a raspberry Pi 4B 4GB ram and I want to connect it to 16 Bluetooth oximeters(BLE) and take readings after every 20 secs. Now I know that pi can connect to only 7-8 Bluetooth devices at a time ...
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24 views

Respeaker 4 mic array setting up error for Raspberry pi

I am trying to set up a microphone to my raspberry pi model 3b. I ordered the ReSpeaker 4 mic array for it but I am having trouble setting it up. I am following the instructions in (https://wiki....
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1answer
196 views

What is this 8-pin fpc place On RPi 4?

I was looking at my Raspberry Pi 4B and I saw something like a not soldered place for fpc connector and I got curious what is that!??? just Look under USB2 at top right corner in the image bellow.
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1answer
28 views

Connection/Voltage-Detection/Voltage and Current Regulation

I'm using a Raspberry Pi zero for a drone. The Pi will be powered by a 11.1V battery. To reduce the voltage and current going into the Pi I'm thinking of using a buck boost converter. If I use this ...
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33 views

Raspberry Pi unusable

I don't know why but my raspberry had a problem who make it restart every 15s... I try to re-install an OS after have format my SD card but it happen again... I see an little ligthning in the top ...
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25 views

How to recognise which button is pressed in ir remote using lirc raspberry pi?

begin remote name Samsung_BN59-01175B bits 16 flags SPACE_ENC|CONST_LENGTH eps 30 aeps 100 header 4676 4367 one 685 1557 zero ...
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23 views

Serial console to Pi 4b shows no output

I am trying to connect to the Pi 4b 8Gb via serial console, however, although I can connect to the serial adapter itself, I can't seem to get no output at all from it, nor using default raspbian ...
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56 views

RS-485: UART configuration for 10 Mbit/s

I would like to use an RS-485 transceiver (e.g. SN65176BD) with my Raspberry Pi 3, to communicate on a network operating at 10 Mbit/s (a common speed for RS-485 networks). Using an unmodified ...
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2answers
31 views

How can I get a Unicast Mac Address for a regular mac XX:XX:XX:XX:XX:XX?

I presume that the vendor supplied router is fairly old and hence this trouble. I want to set a static IP address for my media centre, though I have the regular MAC id, the router insists that I add a ...
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1answer
49 views

Is ubuntu 20.04 compatible with raspberry pi 400?

I use a usb 3.0 for mass storage (with boot). But my OS (ubuntu 20.04) is very slow. What can I do to make it faster ? (I'm on raspberry pi 400)
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31 views

How can I use a computer to control a wired / wireless PWM controller to control the speed of a dc motor

How can I use a computer to control a wired / wireless PWM controller to control the speed of a dc motor (I will be testing both wired and wireless to test response) I have a DC motor 6-12v mini DC ...
0
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1answer
45 views

What is the best codec and library in order to achieve wireless video and audio transmission through Raspberry and LoRa?

I am currently working on a project where i want to create 2 wireless push to talk voice transmitters. I paired 2 Raspberry Pi with 2 LoRa antennas respectively in order to achieve that. However i am ...
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1answer
225 views

Canakit fan that came with raspberry pi 4 louder then usual

So I have a raspberry pi 4 running 24/7 (to keep my discord bot running). I noticed recently that the fan that came with it (from Canakit) seems to be louder than usual. Should I be worried? I have it ...
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21 views

Raspberry Pi 4B or IO Boards + Compute Modules 4 for a raspi cluster?

I am currently thinking of building a small home cluster using raspberry pi hardware and planned on using Raspi 4B's but then came across those IO Boards in combination with compute modules. I was ...
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21 views

Setting up the hardware on a Tor server

I live in the UK and have a BT broadband router on which I run a TP-Link 1GB Ethernet hub router, all of my computers run over the TP-Link 1GB Ethernet hub router, which connect to the BT broadband ...
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0answers
85 views

GPIO INPUT is always HIGH

I am working on a project with HC-SR04 Ultrasonic sensors. I am a beginner in raspberry-pi. I have 3 sensors which are calculates the distance. But one of them has problem which is echo (input) pin ...
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3answers
129 views

Use a usb-c charger with variable voltage for charging Pi4 [duplicate]

I have read here that is possible to charge you pi4 with 3rd party chargers that supply 5V 3A. I am wondering if I can use this 20W charger, which can deliver differnet voltage level (5V/3A, 9V/2A, ...
1
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1answer
114 views

Problem with 1-Wire devices not showing up on GPIO4

i hope you're having a nice day. For a project i want to implement 1-Wire communication in a Raspberry Pi Zero W. The goal is to use a Maxim Integrated Max17313 Fuel Gauge for inspecting battery usage....
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1answer
98 views

Raspberry pi 4 crashes when opening VLC, Openshot, or RPI-Imager

I am using a Raspberry Pi 4 model B 4gb, and any time I open the apps stated above, the window opens, it doesn't display anything, the window is super huge and crashes. Multiple times has this ...
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1answer
56 views

What is the default pin mode for GPIO 7?

I thought that all of the GPIO pins defaulted to input but I'm seeing that GPIO 7 (so is GPIO 8) is set as an output after boot up. Is it being used by something? If I take it over will I cause ...
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0answers
32 views

What connector is used for the keyboard on the Raspberry Pi 400?

I'm trying to find out what is the connector used to connect the keyboard on the Raspberry Pi 400 to the board. But doing a Google search of Raspberry Pi 400 internals only shows the results (in the ...
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1answer
32 views

Stepper motor code - GPIO.LOW not needed?

I am following the Freenove code (ref:- FNK0020 page 202 https://www.freenove.com/tutorial.html) to program a stepper motor. I have simplified the code a little, in any case as far as I can tell the ...
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15 views

Looking for a “high resolution” LED strip

I'm trying to find a high density addressable led strip, mean as many LEDS crammed as close together as possible and their colors can be changed individually. I want to make a spinning blade of LEDS ...
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39 views

7" LCD POWER options

I have a question about powering a 7" LCD. It should be a rather intuitive answer, but I really don't want to risk my screen on the off chance that I'm wrong. While experimenting with things this ...
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0answers
60 views

Stacking up multiple grove base HATs on Raspberry Pi

I want to stack multiple Grove base HATs on a single Raspberry Pi. This is the HAT i am using https://wiki.seeedstudio.com/Grove_Base_Hat_for_Raspberry_Pi My application needs to interface 24 analog ...
3
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1answer
184 views

Pi Zero W 1.1 - What kind of component is this? What does it do?

Unfortunately a component (see image, component is encircled in red) is broken/missing on my Pi Zero W 1.1. So far everything still seems to work, but anyway: Do you know what kind of component this ...
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32 views

Powering raspberry pi with 7.2 Volt battery and a Buck Converter with 1.5A output

I've connected the Raspberry Pi's 5V and GND to the Outputs of a buck converter(https://www.droking.com/30W-Power-Supply-Module-DC-5-32.0V-to-0-30.0V-Buck-Converter-Adjustable-Voltage-Regulator-DC-12V-...
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0answers
34 views

Pi 4 not working with HHKB Hybrid type s keyboard

I can't find the keyboard device using the bluetooth manager and it does not work when I connect via usb. Any help please!!!
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0answers
95 views

Problem with audio

I want to implement Jarvis on my RPi4 and got some problems. I have a Respeaker 4- mic array hat for the Pi and want to use it as an Audio input. As audio output I want to use the 3.5 jack. When I ...
0
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1answer
78 views

Every 24h, network connectivity ceases

Every day my Raspberry Pi 4 4GB loses ethernet (wired) network connectivity (I don't use WiFi on the device). The device is otherwise still functional, but no matter whether I down/up the interface, ...
1
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2answers
601 views

Can you use the Rpi compute module CM4 without the IO board?

I want to use the raspberry pi for some projects, although the normal pi is too big and I want it to be as compact as possible. I thought about using the compute module(without the IO board) since it ...
1
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1answer
44 views

Help identifying an SMT component

I have a RPi zero w that is missing a SMT component. Does anyone knows what component is it and knows it specifications so I can try to solder it again?
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0answers
452 views

Can i run Counter Strike 1.6 on Raspberry pi 3b+

I really enjoy fps games and would love to play CS 1.6 but i don't know if it's possible to install on a Raspberry pi. Anyone got any tips?
0
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1answer
86 views

Raspberry Pi Zero GPIO Pins not working from opposite side?

As a disclaimer, I'm new to digital electronics and somewhat new to soldering. I recently bought a standard GPIO header for my raspberry pi zero, but in order to use both the camera part of my case ...
0
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1answer
103 views

working micro pushbutton gives no Input on GPIO RPi4

I use a simple python script (https://github.com/edus44/lakka-gpio-control/) for Lakka GPIO button input on a Raspberry Pi 4. The script works perfectly: If I short wire one of the GPIO Pins to GND ...
2
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1answer
158 views

RFM69HCW with Raspberry as gateway for wsn

Good day, I am making a wireless sensor network prototype using communication technology, the RFM69HCW module [3]. I use an Arduino nano for the processing unit for the sensor nodes, and for ...
1
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0answers
29 views

Measurements for port placement

I'm going to design my own Pi 4 case because the existing cases I've found don't really meet my requirements. Where can I find complete measurements for port placement? At https://www.raspberrypi....
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0answers
239 views

relay switch switches ON but never switches OFF [closed]

I connected my FL-3FF-S-Z two channel relay board to my Raspberry Pi 3, with gpio 0 and gpio 1 (numbers are from to $ gpio readall). Following some guide, as GPIO generates only 3.3v I have removed ...
0
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1answer
59 views

Switch out the X1 Oscillator on a RPI

Just like a lot of people I'm using a RPi as a NTP server. There is a nice thread about it here: Switch out the X1 Oscillator on a RPI 2/3 User @colintd had a brilliant answer about switching the ...
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2answers
69 views

GPIO extension - USB to GPIO module (NOT GPIO to USB)

I ran out of GPIO on my RPI and now looking for a module to converts USB to GPIO for my Raspberry. I am not interested in converting GPIO to USB, but interested in USB to GPIO. I've been googling for ...
4
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1answer
114 views

GPIO stuck high after shutdown/halt

I'm new to the world of Raspberry Pi, I'm setting one up as a little PC for a kid. I have a RPi 4 running Raspberry Pi OS, and I've build a case around this heatsink. I have created a simple circuit ...
1
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1answer
49 views

How is the radio module connected to motherboard (CPU) on Pi-4? [closed]

By this link we can see that in Pi 4 there is Wi-Fi module (called radio module under the picture). But I can't figure out, how is this module connected to motherboard? Is this PCI bus or whatever? ...

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