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Questions tagged [hardware]

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

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2answers
10 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 ...
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1answer
24 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
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1answer
24 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 ...
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0answers
14 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 ...
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0answers
44 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 ...
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3answers
28 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
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3answers
52 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
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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
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1answer
41 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
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2answers
47 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 ...
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0answers
29 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 ...
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0answers
55 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 ...
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1answer
46 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 ...
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0answers
28 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 ...
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2answers
51 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
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0answers
47 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
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1answer
76 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
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0answers
45 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: ...
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0answers
23 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 ...
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1answer
56 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
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1answer
45 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 ...
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1answer
49 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(...
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0answers
19 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
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2answers
56 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 ...
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0answers
50 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 ....
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0answers
106 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 ...
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1answer
32 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). ...
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0answers
49 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. ...
4
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2answers
146 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 ...
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0answers
20 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 ...
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2answers
121 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
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2answers
91 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 ...
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2answers
45 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: ...
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1answer
30 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?
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0answers
45 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
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1answer
365 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 ...
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2answers
448 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 ...
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votes
1answer
43 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, ...
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2answers
204 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 ...
1
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1answer
60 views

GPIO causes random input on room light switch / EMP?

I am building a simple application with a switch on the rasperry pi 3 b+. I have connected GPIO pin 18/32 through a 56k resistor to 3.3v (tried pin 1 and 17) to have it pulled up. The switch closes ...
2
votes
1answer
32 views

Header Pin Configuration on Pi Zero

I need to wire up 3-5 (maybe a few more) Pi Zeros for a monitoring project that will only require I2C so I only need pins 1,3,5,9 or 3,4,5,6. I can go either 3v or 5v. I want to minimize soldering and ...
0
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1answer
194 views

Micro USB cable stuck on Raspberry Pi 3

I managed to get Micro USB cable stuck on Raspberry Pi 3 B+ Wiggling side to side doesn't work. NB! This isn't a troll post.
0
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1answer
34 views

T-Cobbler Plus for Pi Zero W?

I'm looking at getting a T-Cobbler Plus as shown here. For my project I was thinking of using a Raspberry Pi Zero W, and my question is whether the T-Cobbler will work with the Zero W? The description ...
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3answers
99 views

Add-on sd card in pi?

I want add-on SD card reader/writer/slot/controller in my raspberry pi so that i can keep OS separate from my program. Primary SD card will load OS and work normally and program & data will remain ...
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0answers
122 views

USB Microphone gives error 'Device or Resource Busy'

I've recently purchased this microphone for use with my Pi 3, but I can't seem to get it to work. I run arecord -l and the Pi can see my device: **** List of CAPTURE Hardware Devices **** card 1: ...
2
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0answers
123 views

How to connect CMOS image Sensor to Raspberry Pi

I'm wondering if it would be possible to take an image sensor out of an old camera and plug it in to a raspberry pi via the csi connector. For Example would it be possible to take one like this from ...
4
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1answer
873 views

What are the functions of the test pads on the Pi 3B/3B+?

The various models of the Raspberry Pi comprise numerous test pads (testing pins). Many of these pads however are not mentioned or properly labelled in the official reduced schematics the Raspberry Pi ...
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0answers
84 views

Storage device interface through MIPI CSI+DSI connections

So I love the Raspberry Pi and currently own and use a model 3b (not plus) for learning more about linux and hardware as well as simple projects like a DNS cache server. Lately I was thinking about ...
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1answer
302 views

Elecrow 7" HDMI screen reports No Signal

I'm attempting to get an Elecrow 7" HDMI LCD touchscreen (Amazon UK) to work with my Raspberry Pi 3 B+. Upon following the instructions enclosed with the screen, all I see is "No Signal". The ...
0
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1answer
43 views

Power from Pi 3 to 7" display

Does the 3v3 carried in the FFC cable at the display header of the Pi 3 B+ supply power to the 7" touch display? Or do I need to supply power at J1.1 and .5? If so this power can be pulled from the ...