Questions tagged [hardware]
Questions relating to the physical components that the Raspberry Pi consists of.
849
questions
1
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3answers
30 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
40 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
49 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
46 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
35 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
18 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
292 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
37 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. ...
2
votes
5answers
650 views
Cut power on a remote Raspberry Pi 3 via another raspi
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
16 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
16 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
74 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 ...
1
vote
1answer
93 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
33 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 ...
1
vote
0answers
32 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
45 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
46 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
62 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 - ...
0
votes
1answer
25 views
LoRaWAN connection between three Raspberry Pi 3s
Are LoRaWAN devices able to transmit compressed/zipped JSON files which are 5-10 Kb big?
Furthermore I've been reading up the LoRaWAN technology to get a better understanding. I would like to have 3 ...
0
votes
1answer
49 views
USB network interface not showing up on Pi 3
I am trying to attach a network interfaces (Ethernet Port and mobile Broadband) to my Pi through USB. When I do this on my Pi 1 or Pi Zero it shows up and works without a hitch, but with the exact ...
1
vote
2answers
55 views
Got 3 heatsinks with my raspberry pi?
I got 3 heatsinks with my raspberry pi 3 B+ which was ordered via my school. I got 2 small ones (both the size of the Ethernet chip) and a big one(size of SoC). So far websites always tell me to put ...
0
votes
0answers
48 views
HDMI port is not working
I have been using an RPI3B+ for around 2 months . I used it remotely most of the time. Recently, when I was trying connect it with a monitor via HDMI to VGA converter , it didn't work at all. I ...
1
vote
0answers
56 views
project with my son
I am doing a pi project with my son. For the first part of the project he built a meccanno car and now we are going to power it.
My setup is illustrated here: https://prnt.sc/nb8oph
As you can see ...
-2
votes
1answer
48 views
Ensure/lock a program to run on Raspberry Pi only?
Are there any characteristics/ lock available so that the program would fail to run on any other device except Raspberry Pi. I have thought about using GPIO with external circuits but would prefer ...
0
votes
0answers
44 views
Made a Pi Zero W into a print server for a Dymo 4x6 label maker. However, when I added the printer via Windows, the format is incorrect
And I have no idea how to fix it. The microsoft ipp class driver only has format options for A4 and letter, no 4x6. It prints fine on my iphone but I really would like to be able to print via my ...
1
vote
2answers
56 views
How do I add on/off button to Raspberry Pi Zero?
How do I add an on/off button to a Raspberry Pi Zero board? I am new to the platform and kindly ask for instructions suitable for a novice. Thank you.
3
votes
0answers
64 views
Read/Write LAN9512 EEPROM
We are building a device around the Compute Module 3 and since it needs internet access we decided to go with the LAN9512 that was also used in the Raspberry Pi earlier.
The LAN9512 requires an ...
1
vote
1answer
98 views
Repairing a Pi-top
I recently had the good fortune to find most of a pi-top that was being given away at the Cambridge Computer Museum. What you see in this picture is the entirety of what I picked up. (I previously ...
1
vote
0answers
72 views
mlx90640 how to connect
I brought a mlx90640 to connect to a raspberry pi. I have never connected something to a raspberry pi before and I don't know where to connect it or what cables I need.
The device looks like this:
...
0
votes
0answers
33 views
CM3 Two Camera Previews, one “hangs/freezes”
First time forum poster here, but I hit a wall in debugging this issue. Thank you in advance for any input!
Issue:
I am using two instances of raspistill preview for two hours on two Pi Cameras V2 ...
0
votes
1answer
71 views
Raspberry Pi not booting, even when I install NOOBS on a formatted usb
I have this problem for a while now, the rpi doesn't boot.
The red led is on but the green led never opens. I have formatted the SD card and re-install NOOBS on it but again I can't boot it. Before ...
1
vote
1answer
47 views
P5 code optimisation for raspberry Pi
When I try to execute this sketch that is based on a face recognition algorithm it really lags on raspberry, whereas when run on different devices (macbook pro and notebook), it runs smoothly. You can ...
-1
votes
1answer
51 views
Powering a line following robot with a power bank. Any thoughts?
I am currently wondering for a college project, if it'd be possible or not to use a power bank to build a line following robot and power both the pi 3b+, the waveform motor driver hat with 2 dc motors(...
0
votes
0answers
25 views
Reusing old laptop speakers [duplicate]
The speakers are salvaged from an old Toshiba mini nb520 laptop.
How could I go forward to use these speakers? Will I have to write my own drivers? Will it be worth the work? What electronic ...
1
vote
2answers
78 views
Testing for hardware faults
I have recently been having a lot of issues with my raspberry pi 3 b+. Many seg faults and weird errors coming with programs like apt and certbot. This is on a fresh install of raspbian lite and I ...
0
votes
0answers
80 views
I have been working with a pi 3 b+ and a PWR.A53.B power and driver board
I have been working with a pi 3 b+ and a PWR.A53.B power and driver board . Sadly the switch on the power board was damaged and fell of . I couldn’t put the switch together as I lost the small pieces ....
0
votes
0answers
155 views
SPI DMA in Raspbian
Is it possible to access the SPI DMA on a Raspberry Pi running Raspbian without using custom drivers by directly reading and writing to the associated hardware registers? I assume the register ...
0
votes
1answer
35 views
Small Wifi double switches behind sockets ( Home automation - lights) [closed]
for my first experience with the raspberry pi i'd like to create a map of my house on which i can control the lights. ( Currently there are no extra cables etc to enable domotica in the house).
...
0
votes
0answers
50 views
Send IP packets between two Arduino or two Raspberry boards
I have two Arduino boards and I want to do a small project with them.
I want them the do the following:
Firstly, I want to send an IP packet through the network from the first Arduino to the other. ...
3
votes
2answers
173 views
Recognizing a counterfeit Pi
I'm considering purchasing a Pi 3 at a local store rather than importing it from Adafruit. However, a lot of local retailers are, how can I say, significantly questionable.
I've heard that are some ...
0
votes
0answers
21 views
Analog input together with LoRaWAN
I am looking for a hardware configuration enabling me to read an analog input from ammeter and collect the historical data and send them over LoRa to a server.
So I could use something like Monarco ...
0
votes
2answers
155 views
What tool should I use to cut off the GPIO pins?
I would like the make the Pi Zero W smaller and cut off the part of the PCB that holds the GPIO pins. What tool should I use to do so? Is a Dremel/rotary tool too destructive?
I'm thinking an XActo ...
2
votes
2answers
94 views
Hardware Level Query for Pi Version
Is there a way you can query the model and revision of a Pi from a script without accessing files that are generated at install time for the OS? I have a project where a web page needs to display the ...
0
votes
2answers
50 views
Get different values from potentiometer even not touching
I have a potentiometer that is used to adjust volume level along with MCP3008 but even if I don't touch it, its values are going and coming as following.
Press Ctrl-C to quit...
Channel 0 minus 1: ...
0
votes
1answer
38 views
Can i use 5v 3amp. in Raspberry Pi3 B+ [duplicate]
i am using Raspberry Pi3 B+ and i am in a confusion that can i use 5 volt, 3 ampare adaptor in my Pi?
0
votes
0answers
49 views
Thermal imaging
I was wondering if anyone knows of a thermal imaging app for either iOS or android, just purchased an p3 b+ and just trying to get a few things clarified befor I start her up, also any info on a ...
0
votes
1answer
558 views
Sniff 433MHz signal from Raspberry Pi 3 B+
I have a remote for my kitchen fan where I can turn on the fan and light.
I want to sniff the signal for the light toggle so I can use my Raspberry Pi 3 B+ to send the signal.
I bought a 433MHz ...
1
vote
2answers
995 views
Raspberry Pi 3b+ not booting
I got a raspberry pi 3 b+ for Christmas and yesterday whilst installing a Pi Hat's Software (Rasp.io Duino) it just flat out died after showing that there was an under-voltage, even though I was using ...
-6
votes
1answer
52 views
Transistor Count vs Bit Count [closed]
When looking at the history of microprocessors I see that there is not a consistency with the bit count and transistor count of the microprocessors. For instance the first Intel 4004 was a 4 bit chip, ...
1
vote
2answers
289 views
How to use Solenoid Lock 12V DC
I'm new to this, and I can't see how to control a solenoid lock using raspberry (The wirings). I have an 8x AA Battery pack which is wired to output 12V. I don't know where to connect the black and ...
