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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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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 ...
Junior Delaure's user avatar
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3 answers
73 views

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 (...
Leandros's user avatar
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32 views

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 ...
ImTheBeemoPlush's user avatar
1 vote
0 answers
27 views

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 ...
user390652's user avatar
0 votes
3 answers
62 views

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 ...
MagicSmoke's user avatar
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1 answer
19 views

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 ...
user3553471's user avatar
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0 answers
44 views

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 ...
Jakub Chromiak's user avatar
3 votes
1 answer
328 views

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 ...
mpaw's user avatar
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-2 votes
1 answer
28 views

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 ...
Lean345's user avatar
0 votes
1 answer
48 views

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 ...
Martin819's user avatar
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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 ...
cAYK's user avatar
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2 votes
0 answers
93 views

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 ...
Vaaarad07's user avatar
1 vote
2 answers
120 views

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 ...
Lucas Rønne Jeppesen's user avatar
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1 answer
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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: ...
www.jensolsson.se's user avatar
1 vote
1 answer
79 views

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 ...
Anjana Silva's user avatar
1 vote
0 answers
75 views

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 ...
thrandale's user avatar
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1 answer
45 views

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 ...
Ross's user avatar
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1 vote
0 answers
26 views

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 ...
John Stabler's user avatar
2 votes
3 answers
288 views

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. ...
Dylan Turner's user avatar
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0 answers
67 views

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 ...
Johannes Bauer's user avatar
1 vote
1 answer
135 views

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: ...
Johannes Bauer's user avatar
0 votes
1 answer
49 views

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 ...
notanickel's user avatar
1 vote
0 answers
91 views

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, ...
Nico's user avatar
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1 vote
1 answer
476 views

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 ...
Sanfour ben sanfer's user avatar
2 votes
1 answer
407 views

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 ...
user391339's user avatar
0 votes
1 answer
130 views

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 ...
Edoardo Balducci's user avatar
1 vote
0 answers
161 views

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 ...
Edoardo Balducci's user avatar
3 votes
0 answers
193 views

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. ...
JohnSH's user avatar
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1 vote
1 answer
128 views

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 ...
user10709800's user avatar
5 votes
3 answers
850 views

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 ...
user10709800's user avatar
6 votes
1 answer
223 views

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: ...
smokku's user avatar
  • 171
0 votes
3 answers
357 views

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 ...
user10709800's user avatar
1 vote
0 answers
105 views

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 ...
David G's user avatar
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1 vote
1 answer
121 views

Raspberry Pi Pico W not executing main.py when connected with ammeter

I am trying to measure the current flow of a Raspberry Pi Pico W running simple code that blinks the onboard LED saved as 'main.py'. I have verified this code runs when connected to a) my laptop and b)...
harryt's user avatar
  • 23
0 votes
2 answers
236 views

How to read the SN74LVC245A datasheet

I'm looking for help with how to read datasheets. For the below application, specifically what in the datasheets is it that would help me choose between these components? (datasheet for SN74LVC245A.) ...
mozboz's user avatar
  • 101
1 vote
2 answers
137 views

Breadboard power supplies get hot in less than two minutes of runtime

I am trying to power two Raspberry Pi Picos with one breadboard power supply (found here.) When I connect a 9V battery to the supply (and have ensured correct wiring, correct rail polarity, etc.,) the ...
harryt's user avatar
  • 23
1 vote
4 answers
398 views

Issues driving 3W RGB LED (common anode): Can't light all 3 colors at once

I hate asking advice somewhere that I can contribute little so trust when I say that I have logged many, many hours researching this.. have watched every relevant video on YouTube I can find, every ...
Outbak Jak's user avatar
2 votes
1 answer
1k views

Can the Raspberry Pi Pico handle 10V?

I am currently trying to restart a long forgotten project of mine, because it started to bug a little. I now want to make the project more sophisticated (by not using jumper cables in "production&...
Moritz's user avatar
  • 123
2 votes
2 answers
969 views

How to test Raspberry Pi Pico after soldering header pins?

I just got my first Raspberry Pi Pico and I don't have any experience in electrical engineering. The book I'm following indicates that I first have to solder the and the first step is to solder the ...
Jens Wagemaker's user avatar
1 vote
2 answers
73 views

Raspberry Pi Pico controlling servo and timer

I would like to create a program that uses a Raspberry Pi Pico, this four-digit seven-segment display, SG90 micro servos, and one of these buttons. My idea is that every time the button is depressed, ...
Vorde Vord's user avatar
0 votes
0 answers
79 views

Getting audio hiss out of my project

I'm trying to build a small audio toy for my daughter. I am using a Raspberry Pi Pico and the C SDK. I am able to successfully play a pre-recorded WAV file stored as a C header file using the DAC and ...
JBrooks's user avatar
1 vote
1 answer
2k views

Raspberry Pi Pico GPIO amplification

I'm trying to control a handful of LEDs via Raspberry Pi Pico, on a single GPIO pin. I've wired up 14 LEDs in parallel, each with it's own resistor (330 Ohm, 0.5 Watt). Combined, the LEDs need to ...
thebigbadme's user avatar
0 votes
0 answers
166 views

SSD1351: Image corruption (Pi Pico SPI buffer issue)

I am trying to get an SSD1351 driver working with a 128x128 OLED display, driven by a Raspberry Pi Pico. I have been able to get the statistics part of this working, however the image is being ...
StonedEdge's user avatar
1 vote
0 answers
194 views

HC-06 module does not receive data from Raspberry Pi Pico

So I have a project that I'm currently working on and I am also using the HC-06 module as a part of the communication process between the Raspberry Pi Pico and my application. A while ago when I was ...
David's user avatar
  • 11
0 votes
1 answer
103 views

Wiring issues with the Raspberry Pi Pico

I am having problems wiring a water pump with the Raspberry Pi Pico. I have the pump connected to a relay which has IN connected to GPIO 12, GND connected to a ground pin, and VCC connected to VBUS. ...
amlelephant's user avatar
1 vote
0 answers
129 views

Power path PCB design

I'm using a TP4056 Li-Ion battery charger with a Raspberry Pi Pico. The charger doesn't have built-in load sharing, so I'm using a P-channel MOSFET to take all load off the battery while it is plugged ...
Bubs's user avatar
  • 11
3 votes
1 answer
642 views

Do ground loops matter with the Pi Pico?

The Pi Pico's pinout contains multiple ground pins: My understanding is that this will create ground loops where current can flow. Is this a problem? Should I only use one of the ground pins?
Edwin Shepherd's user avatar
2 votes
0 answers
257 views

Raspberry Pi Pico charging MOSFET schematic

As per the recommendation of Raspberry Pi Pico, using a P-channel enhancement type MOSFET (DMG2305UX) to switch the the power to VSYS pin isolating the battery when VBUS is available. The schematic is ...
Suresh Kumar's user avatar
1 vote
1 answer
835 views

I2C interfacing between Raspberry Pi Pico and LCD-Display 1602A doesn't work [closed]

I want do display text on my LCD 1602A display using a Raspberry Pi Pico and PlatformIO with Arduino library. Since the address pads on the PCF8574 board are empty, my address should be 0x3F or 0x27. ...
nowsqwhat's user avatar
0 votes
1 answer
171 views

Connect 100 ESP8266 WiFi modules to a master (Raspberry Pi Pico W)

I am looking for the most efficient solution for transferring data from ~100 individual ESP8266 WiFi modules, that have sensors connected to them, to my Raspberry Pi Pico W. This will be used for a ...
drew wood's user avatar
  • 239