Questions tagged [raspberry-pi]

The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. There have been several generations of the device with improved performance, more memory, and more connectivity. This tag should be used for electrical engineering questions that involve the use of a Raspberry Pi. For questions about the Raspberry Pi itself see the raspberrypi.stackexchange.com Raspberry Pi specific forum.

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72 views

Capacitive where is the touch?

I am a newbie in the world of circuits and electronics. But we all started somewhere. I have this idea about a street sign that should be used as an instrument. All most like a Theremin. Touching it ...
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2k views

Detecting vehicle on parking spot

For a project we're working on we need to detect if a car is standing on a parking spot. We're using an ultrasonic sensor for this, SRF05. While using the correct timings we can only sense for about a ...
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207 views

MOSFET to be switched by a raspberry pi

My raspberry pi produces a 3.3V on it's GPIO. I want to buy a through hole MOSFET so I can simulate touch-events on a smartphone screen like this video. I'm trying to find something on Digi-Key, but I'...
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349 views

XBee module lockup/freeze

I am using Xbee series 2 modules to handle communications between my home automation modules. As my base station, I am using Raspberry PI with Xbee coordinator attached to it. It all seems to be ...
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366 views

What is the best way to take multiple near-simultaneous pictures from 6 cameras on a development board?

I thought I could use a powered usb hub, connect the 6 cameras to it, connect the hub to the raspberry pi and capture the images one after the other quickly using the motion package. But I can't find ...
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2k views

Raspberry Pi with SMBus SmartBattery

I'm trying to interface a Raspberry Pi with the mini-box OpenUPS. It claims to implement the Smart Battery SMBus specifications. I can read data from the device using the i2c_smbus_read_word_data() ...
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2answers
81 views

RPI-arduino communication without UART

I'm working on a project where a raspberry pi zero will be the main controller. The pi has to receive information from a GPS module (gy-gps6mv2) over UART. The same pi will be controlling (receive and ...
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29 views

Raspberry PI - Emergency Battery Run

I have a Raspberry PI and an 12V LCD board for a laptop salvaged LCD. I'd like to have a battery backup system when there is no electricity. I've designed such diagram. Please let me know if you see ...
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35 views

Raspberry Pi Connected to CH340 on STM32F103. Broken Pi and USB interface

I have a 3D printer that's running based on a STM32 chip. Included on the mainboard is a CH340 serial to USB converter. I connected this board with to my Raspberry pi 3 which I powered using the 24v ...
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26 views

Will this MUX work for my application?

I'm having a hard time determining if this mux will work for my application: https://www.mouser.com/datasheet/2/256/MAX14752-MAX14753-1515255.pdf I'm trying to use 2 of these together in a PCB I'm ...
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43 views

Attaching Arduino TFT LCD screen to Pi 4 without soldering it on?

Note: Already asked on raspberry stack-exchange. I was directed to this community instead. So I have this product: https://learn.adafruit.com/2-8-tft-touch-shield/lcd-test My goal is to connect it to ...
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42 views

WS2813 Lead Wire Issues

I've wired a set of WS2813 leds to a Raspberry Pi. The led strip is found here: https://www.amazon.com/gp/product/B077J27Y4X/ref=ask_ql_qh_dp_hza When I have this strip connected via the short cable/...
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Raspberry Pi : White/Blank screen with new shielded cable

I'm currently passing EMC tests at a test lab. For the purpose of the tests, I made a custom DSI cable for the official Raspberry Pi 7" screen with shield against EMI as the PCB of the official ...
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43 views

Custom PCB with ADC for monitoring Lifepo4 battery bank voltages

I designed a custom PCB board to allow me to monitor the individual battery cell voltages in my Lifepo4 48v battery bank. Here is a schematic of the PCB: Basically I'm using a molex micro fit junior ...
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44 views

Autonomous Robot Power Supply Redesign

I am getting started in electronics/robotics by making a Raspberry Pi robot. I have a (somewhat) working prototype but realized that I need to have a single rechargeable power source. Currently, I ...
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17 views

Ideas to for range prediction algorithm for electric scooter battery

We are working on an electric scooter (moped) project and would like to get the distance reading (that goes to the odometer from the hall sensor / bldc controller) on our IoT device. The scooter uses ...
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14 views

How to read & interpret the hall sensor or get the dashboard odometer readings for an electric scooter?

We are working on an electric scooter (moped) project and would like to get the distance reading (that goes to the odometer from the hall sensor / bldc controller) on our IoT device. The scooter uses ...
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15 views

How to simulate immobilizer (RC remote control anti theft device) signals using a motor controller and sensors?

We are working on an electric scooter (moped) project. We have added a PCB to it. The scooter has a remote functionality anti theft system (radio controlled like most cars). We would like to retain ...
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62 views

Raspberry Pi CM4 I/O board 2-layer PCB design

I am a beginner in PCB designing, well in past experience, designed an PCB with some sort of digital signals, power (AC/DC) lines and USB. Now I am working to design the PCB for CM4 I/O board with ...
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22 views

LiPo balanced charging circuit from USB, controllable by a Raspberry Pi

I am building an RC car controlled by a Raspberry Pi, and I'm not sure how to go about setting up the power delivery circuit. I plan to power it with a 5200mAh LiPo battery, 2 cells, 50C rating @ 7.4v....
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36 views

Powering Raspberry Pi from multiple DC voltage sources

I'd like to have some method of powering a Raspberry PI 3b project from a variety of sources, whilst being backed up by a battery: Internal battery Car cigarette lighter Mains (via a DC adapter, like ...
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24 views

RPiBoot control jumper requirement?

Please, I need help with this schematic. I would like if there is something wrong on this schematic about Raspberry Compute Module 4 Carrier PCB design. I will only use PCI interface and some GPIO's. ...
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1answer
63 views

Strange behaviour Raspberry Pi 4

I am powering raspberry Pi using GPIO no 2, 4, and GND as recommended. The Pi only shows RED constantly ON led and does not boot. However, if I connect the USB power source it boots up. The power ...
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18 views

PCB Raspberry Compute Module 4 Carrier Design

I'm working on a PCB Carrier Design for Raspberry Compute Module 4, I have and question for PSU module. I want to supply it with +5V, 3A, and use the same USB-C Connector to Data Transfer to eMMC for ...
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1answer
24 views

How to troubleshoot a (possibly fried) ws2812b led strip

I have a 4.5m, 60led/m Ws2812b strip, hooked up on a raspberry pi running hyperbian. Raspberry works on its own psu, and I have a meanwell 5v 18a for the leds with common grounds. The setup was ...
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2answers
46 views

Controlling simple output with a button and a relay

Just a side-note, I am a complete beginner when it comes to circuitry. I am attempting to control a garage door controller with a relay powered and controlled by a Raspberry Pi. The garage door ...
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24 views

USB differential data lines pulled up to 5 V

My design uses the compute module 3+ board from the raspberry pi foundation. I used the FSUSB42MUX schematic from the CMIO board to have a slave/host USB port. My problem is the D+ and D- lines are ...
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1answer
56 views

Raspberry PI 4 Compute Wakeup Circuits

on the raspberry PI 3 computer IO boards datasheet it has on page 10 (first sheet) is has the option to connect jumper 13-14 to wake up the computer module by connecting global_en to run_pg run_pg is ...
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1answer
76 views

12V 4-pin Noctua NF-A8 on Raspberry Pi 4B

I am using a 12V 4-pin Noctua NF-A8 fan https://noctua.at/en/nf-a8-pwm and want to use the PWM functionality also read the rpm from it. Firstly, I went over dozens of forum discussions on a 5V 4-pin ...
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28 views

How to wire TLC59281 to a Raspberry Pi?

I have a 7 segment display that is driven by a TLC59281. How do I connect its pin to a Raspberry Pi in order to drive the display? Edit: It uses SPI interface. The datasheet can be found here.
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27 views

How to capture the I2S signal via Raspberry Pi Zero?

I would like to capture the I2S data from ADC CS5340 by raspberry Pi zero, but I could not find relevant I2S API to use in raspberry pi zero. Could anyone help me on this? Thanks!
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47 views

Charge device and power other devices over the same USB port

I'm creating a raspberry pi based mobile device. It has a LiPo-battery and a lipo charger, which will power the raspberry pi. The device should have one usb port, over which the device can be charged ...
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1answer
56 views

Can I connect DTR Pin to CTS Pin?

I want to connect a Pixhawk 4 (It's a flight controller) to a Raspberry Pi 3. Therefor I purchased this FTDI USB adapter. Its pinout is the following: ...
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1answer
39 views

PCB GNSS module with RPi

I am trying to get a GNSS module to communicate with a raspberry pi serially. I was attempting to set this up with an ESP module but I don't think it will work, or at least I am missing something. In ...
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19 views

OpenOCD SAMD21 programming from RPI Error Flash write discontinued / NVM programming error

I am trying to use OpenOCD + RPi to program an ATSAMD21J18A via SWD. I have a connection, can see flash info but programming fails with a Flash write discontinued / NVM programming error. I have a ...
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1answer
86 views

ESP32 UART to Raspberry Pi I2C

I am trying to understand how to connect an ESP32's UART pins to my raspberry pi 3B+'s I2C pins. I see several bridge chips available for this like TI's MSP430 Datasheet. But I am not very circuit ...
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48 views

Controlling 60v with mosfet through pwm

I got this setup for controlling high voltage with PWM through a Mosfet ranging from 0-60v. Im using the PCA9685 for generating the PWM signals and then the mosfet FQP30N06L for controlling the ...
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47 views

Motor controlled using Rpi 3 and 12V power supply

Could someone please assist me with the below circuit? I can't seem to get it to work. I am using a 12V power supply and Raspberry Pi 3. Apologies, I am very new to circuits. The DC motor does not ...
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17 views

Compute module 4 data protection

I am building a IoT device using Raspberry Pi Compute module 4, Using usbboot, we can read eMMC as a flash device with which we can read and write the eMMC from any computer. Is there any way we can ...
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36 views

Arduino/RPI module to control LED fairy lights with reverse polarity

I cant find any module to control my garland of lights by any embedded device. This module should be powered by DC12V input (but also possible to use Step Up/Step Down DC-DC voltage converter). The ...
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35 views

Rf/voltage powermeter

I want to start a project and i'm clueless even after reading a lot. I have an rf route with some rf components/equipments connected, analog signals going through (wired). My goal is to check the dB ...
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198 views

How to interface a RPi Pico to DMX / RDM

Years ago, I was looking at creating a stage DMX controller using AVR. Time moved on and the Raspberry Pi Pico has now been released. I'd like to revisit the project using a Raspberry Pi Pico, which ...
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24 views

Switching Circuit from Arduino to Raspberry Pi (Reading Analog Values)

I have wired up this circuit from learn.parallax I have wired this up to an Arduino and it works exactly how I want it too. This is the code that I used to get it working (also from parallax): ...
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1answer
40 views

Powering 10V motor fader in Raspberry Pi 4 project

I am building a project that uses a motorized slide potentiometer with a Raspberry Pi 4, for the purpose of controlling multiple audio sources (such as system volume, VLC, OBS, and any other I can ...
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26 views

Potentiometer bypassing for guitar pedal UI

Firstly, I'm an electronics/hardware noob. I'm working on a project using a Raspberry PI pico to collect UI inputs for a digital guitar pedal. I'd like to use the 3 ADC pins to measure 3 ...
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1answer
22 views

Writing to BQ25700A with i2c_smbus_write_block_data

I'm trying to write to a TI buck boost charger (BQ25700A) using the i2c_smbus_write_block_data command, to try to provide current to a battery. ...
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1answer
34 views

How do I determine my new power requirements when switching my peripheral to Raspberry Pi

Problem: I have just moved my camera array USB peripheral from a MacBook Pro to a Raspberry Pi 400, and the Pi can only see at most 19 of the 24 cameras that the MacBook Pro can see. I think this is ...
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41 views

Simulate press on a rubber button infrared remote control with a Raspberry Pi

I'm stuck. I'm trying to use a Raspberry Pi to simulate a button press on an infrared remote control that uses conductive rubber buttons in order to control/automate a toy with Python. Really grateful ...
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41 views

Pigpio control of SG90 servo is imprecise on Raspberry Pi

I'm in the process of trying to build a laser turret using two SG90 servos, a laser diode and my Raspberry Pi. I've come to realize that the pigpio library I'm using to control the servo seems a bit ...
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47 views

How to run encoder motor with motor driver and raspberry pi

I am kinda new to the Robotics field and Raspberry Pi and has worked on very basic projects with the hardware so far. My current task is to run the "Encoder Motor" with a motor driver(...

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