Questions tagged [raspberry-pi-pico]
The Raspberry Pi **Pico** is a series of microcontroller boards from the Raspberry Pi Foundation, typically using its RP2040 microcontroller chip. It is a much smaller device than the main series of Raspberry Pi computers.
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Will using these pins on the RPi Pico cause issues?
I'm wondering if any of the given pins are reserved for the RP2040's function. For context I'm making a line following robot for high school competition.
GPIO 0 - Start Button
GPIO 1 - Debug Pin
GPIO ...
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How to make BME280 sensor and MPU6050 sensor work in same sketch with Raspberry Pi Pico W
I have made init methods for both sensors inside of their own classes, and then I tried to combine them in the same sketch. I created a custom I2C object wire to be used with the MPU6050 to stop the ...
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Using a pico and a photoresistor to measure light intensity
I've recently been trying to do an experiment requiring me to measure light intensity.
I didn't have the necessary equipment, but I did have a photoresistor and a Raspberry Pi Pico, so I tried ...
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What is slicing in PWM?
I am working on PWM control with a Raspberry Pi Pico and came across the term "Slice," for which I am unable to find a proper definition on the internet.
A quick search gives "Slicing ...
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Controlling current through a RL load using Triac firing angle
I want to control the amount of current going through a Triac by adjusting the firing angle accordingly. The Circuit is shown below:
Let's say i want IRMS to be 0.28A then the controller need to ...
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How to drive a 7-segment LCD that has no common anode / cathode using a Raspberry Pico?
I recently acquired a 7-segment LCD, and I am having trouble to understand how to use it. Is it possible to use it with a Pico without any additional hardware?
From what I know from my research, LCDs ...
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why does this LM393 need too much voltage to go high
I have the following circuit taken from Arts of Electronics. I am using it to detect zero-crossing of a 40V-RMS/50Hz input. I am connecting the output of the comparator LM 393 to a GPIO pin of Raspi ...
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Using Pi Pico as Access Control
I am designing a Access Control System based around a Pi Pico microcontroller. I took some Circuitry classes in college and I remember blowing multiple chips trying to get everything right. My ...
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6N137 opto-coupler with AC input takes a lot of time to trigger
I am designing a zero-crossing circuit to connect it to a RasPi Pico W input. I am using a 6N137 from Liteon. I have a problem because it takes around 200 microseconds to turn on with an input of 40V ...
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Change direction of > 5 pins with PIO asm
My understanding is that this changes the direction of up to 5 OUT pins:
out pindirs 31
In the above example, 31 would be all 5 bits set to 1, so the first 5 OUT ...
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Circuit To Simulate Capacitive Touch Button Press - Raspberry Pi Zero
I realise similar questions have been asked in the past about automating capacitive touches, but I'm aiming to put this into practise with a simple circuit.
I want to be able to simulate / automate ...
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Cannot figure out wiring for CamJam EduKit 3 with Pico WH
I am trying to build this kit using a Pico WH instead of a regular Pi but cannot get the wiring correct at all. I found the pin layout for the motor controller board but I am not sure if I am using ...
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Raspberry CM4 UART with anticipative RTS signal
I am using RPi CM4 with UART for a project. This is the relevant part of /boot/config.txt:
...
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MOSFET keeps dying on totem pole driver
I am designing a 3-phase motor driver for a 300 W hoverboard motor with a Raspberry Pi Pico, which has 3.3 V logic, for driving the MOSFETs I am using a discrete totem pole driver on the n channel ...
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micropython pyb module not found
I want to debounce a button in micropython and found this page on the micropython docs: https://docs.micropython.org/en/latest/pyboard/tutorial/debounce.html
It uses a library called pyb but my ...
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Charging circuit for Raspberry Pi Pico
Currently I am working on a kind of pager project. The main idea is that a base station communicates via LORA with my handheld, similar to a DECT phone (Fritz!fon, Gigaset, ...)
The handheld should ...
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How do input pins work?
I am trying to understand properly how buttons work with the pico; I can make them work but I don't understand why it works or if it is the right approach.
I get that I need to add Pin.IN when ...
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W25Q16JV and XIP/continuous mode support (for RPi Pico)
My RPi Pico embeds a W25Q16JVUXIQ. Based on its datasheet, it does not support DTR or "continuous read mode" (which should allow reading without sending the command byte, by setting the M7-0 ...
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Grounding issue with PWM fan controller on Raspberry Pi Pico to drive 12 VDC fan
I'm trying to build a PWM fan controller for an industrial Noctua PWM Fan (NF-F12 IndustrialPPC 3000 PWM). You'll find the schematic below.
The fan is powered by a 12 VDC power supply (...
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How to find the matrix layout of an old EEPC keyboard
The title asks my question; how can I find the matrix layout of an old EEPC keyboard. I found an instructables about making a USB keyboard controller but it uses a Teensy microcontroller, and I think ...
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Soil Moisture Sensor ADC value is inaccurate [closed]
I am planning on making a soil moisture sensor with a capacitive sensor, Thonny ide, micropython, and a raspberry pi pico w, and I followed some online tutorials as I am relatively new to the world of ...
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High side switch with Raspberry Pi Pico
I'm looking for a circuit suggestion to drive a 5v resistive load that draws up to 400mA using a Raspberry Pi Pico with a high-side switching circuit. Most every example I could find used an external ...
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Pololu DRV8833 not working with pico
I am trying to use a Pololu DRV8833 driver to drive a DC motor via a pico.
Below is the setup
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Two-way analog signal converter
To begin with: I have almost zero electrical/electronic knowledge.
I want to have something like two-way analog signal converter. On one side there is 0V-15V and on the other there is 0V-3.3V. The ...
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Transistor won't fully turn off when Fan PWM is connected
I'm trying to use a RP2040-zero to control a 12V PC fan that also has a PWM and tach connection. I'm using a transistor to turn off the fan completely as a 0% duty cycle on PWM doesn't turn the fan ...
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Analog sensor isolation for Raspberry Pico analog pins [closed]
I’m designing a logger to collect data from a thermocouple (may be any type) using Raspberry Pico (3.3V). I want to isolate analog pins. As per my study inductive isolation can be done to transfer ...
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Controlling motor with Raspberry Pi Pico and relays
I have a 12V motor which can be rotated forward or backward based on the polarity. I would like to control it with Raspberry Pi's GPIO ports. So that by switching 2 GPIO ports on Rpi I would be able ...
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How do I implement a USB-C connector onto a pcb to power a 3.3v Raspberry Pi Pico?
I've been looking into how to create my own pcb with a USB-C connector which breaks out into pins (VCC, D+, D- and GND) to then connect this to a Raspberry Pi Pico microcontroller but I have a few ...
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Custom RP2040 board not working
I have designed a custom RP2040 board referring to the official hardware design guide for RP2040.
When I boot the device in bootsel mode, it does get detected as a USB mass storage device on my host ...
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SPI goes low too fast; Raspberry Pi Pico PIO and ADS7042
I am trying to use an ADS7042 (12-bit ADC) with my Raspberry Pi Pico with the Pico's PIO, but the signal goes low too fast and it seems to have problems going high sometimes, do I need to add some ...
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Trying to drive a I2S MEMS microhpone (SPH0645LM4H) using RP2040 PIO but timing seems bad and I dont get any audio back
So I want to connecte an i2s MEMS microhpone to a RP2040.
I have made a PIO program that looks like this:
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Raspberry Pi Pico, ensuring the circuit diagram is correct
First of all, thank you so much for your interest in my question.
Introduction
The following is a schematic diagram I drew up to represent my Raspberry Pi Pico WH - LED lamp project. I am controlling ...
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BLE interference from DC motors
The problem:
I am making a remote control car. The car is being run with a Raspberry Pi Pico W. The power source is a 11.1 V Li-po. The power to the Pico is being stepped down with a 5 V regulator. I ...
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Emulating a resistive keypad
I am building a circuit to emulate a resistive keypad. Each digit has a specific resistance between 3k ohms and 30k ohms. When there is no digit pressed the circuit is open. When a digit is pressed ...
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Speaker pop / crackle when SBC connects to WiFi
I'm using a Raspberry Pico to detect movement and play a sound via an amp & speaker. At certain intervals the Pico attempts to connect via WiFi to send and receive data.
However, when attempting ...
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How to correctly design the USB power and communication interface for an RP2040 PCB?
I am trying to design a board that uses the RP2040, and after several iterations I am stuck. No matter what I try, I cannot get my boards to be recognized by USB. Thus, I also can't program them.
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Turning on a fan through a relay power-cycles a Raspberry Pi Pico
I'm trying to control a fan 1 using a Raspberry Pi Pico and a relay 2.
The relay is connected to the Pico on pin 19 (GP14) for signal, to GND, and to 3V3.
The Pico is powered and controlled through ...
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Power Raspberry Pi Pico from Mains (use LED driver?)
I'd like to permanently install a Raspberry Pi Pico in a place in my house where I don't have a power socket but a power line (230V, 50Hz).
As I understand it, there are two ways to power the Pico:
...
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Turning power on to relays interferes with thermocouple reader
I have 6 3V reed relays SIL03-1A72-71D that connect to a raspberry pi pico directly via gpio pins 11, 12, 13, 14, 15, 18, and 19 on a custom pcb. The connections to the relays are: 1 is connected to ...
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Pi Pico shorted after working fine
After working for a couple of weeks, a pi pico is just shorted.
It is used on a board that gets a midi signal as input and controls six mosfets as output.
When powered by usb maximum power is drawn, ...
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What are PIO asm pindirs and how do they work?
What precisely does "pindirs" accomplish? I initially believed it defined the pin direction, indicating whether it's set as an input or an output. However, in a Raspberry Pi forum (link) it ...
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On the Raspberry Pi Pico 2040 Pinout Diagram, why are I2C bus pairs overrepresented across pins?
Picture source: Raspberry Pi's official site
RP2040 is a 32-bit dual ARM Cortex-M0+ microcontroller integrated circuit made by Raspberry Pi Ltd. In January 2021, it was released as part of the ...
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Powering a pico with a lipo battery charged by a bike dynamo
I am building a GPS tracker build on Raspberry Pi Pico and a u-blox NEO-6M GPS module. Now, I want to power this project with a lithium battery that can offer some autonomy. I was thinking of using a ...
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Raspberry Pi Pico powered by a bike dynamo
I am building a GPS tracker for my bike using a Raspberry Pi Pico and a NEO-6M GPS module.
I need this GPS to be up and running at least 14 hours a day.
The only problem is the power source. Ideally ...
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Nixie Clock with Raspberry Pi Pico
I am trying to make a multifunctional nixie clock controlled with 2 Raspberry Pi Picos. Because of my mistake I can't plug every IN-12Bs into sockets. So I can only test a maximum of 4 at a time. ...
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How to convert from datasheet dB value to pressure per volt?
I am trying to measure sound waves using a Raspberry Pi Pico ADC pin but am having trouble converting the sensitivity value on my data sheet into pressure units per volt.
I have read a many articles ...
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What determines an electret microphone voltage?
I am trying to get an electret microphone working with my Raspberry Pi Pico's ADC pin. I am trying to detect the output by passing it through a transistor.
I have a 4.5V voltage source. I split this ...
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Pi Pico generating YPbPr-like signal for VGA monitor
I would like to generate TED-like signal for VGA monitor input (Analog RGB + H/V-Sync). This is basically 16 pre-defined chroma values with 8 brightness levels applied, encoded as 7 bits: ...
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Why does an electret not pick up sound?
I am trying to get an electret mic to detect sound, which I can then pick up using a Raspberry Pi Pico ADC pin.
My electret has two output pins. One is connected to ground, the other is connected to ...
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HX711 gaps in data
I am using an HX711 connected to a Raspberry Pi Pico to read some load cells and send the data up to a Raspberry Pi via USB, using a Python library for the HX711.
I am chasing an intermittent problem ...
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