Questions tagged [wiring]

Items referring to physical wiring. For question to the wiringPi library use the tag wiringPi.

Filter by
Sorted by
Tagged with
0
votes
0answers
14 views

Using Temp Sensor to Control Mains Water Valve

I have a complicated use case that I'm hoping to solve work a RaspberPi. I need to control a valve that turns on mains water from city service when a temperature sensor reaches the max allowable limit ...
0
votes
1answer
3k views

Correct wiring for multiple analogue sensors?

I’ve recently embarked upon a project that I’ve wanted to do for a while. My overall plan is to have 3 planting shelves; each will have its own soil moisture sensor, water pipe and LED lighting. The ...
1
vote
1answer
468 views

What Circuit Should I Use to Hardwire Raspberry Pi to Doorbell?

I am trying to connect my raspberry pi to my hardwired doorbell in order to send a text message when the doorbell button is pushed. I have successfully sent the text message using a button connected ...
0
votes
1answer
35 views

Wiring an Omron Thermal Printer to a Pi Pico

I'm trying to connect an old Omron thermal printer (PRT-1 Z, companion of the 705CP Blood Pressure Monitor) to a Raspberry Pi Pico. The idea is being able to print something using the Pico. The ...
0
votes
0answers
30 views

How to power this LED array

I have this infra-red LED array that I took from an old game camera. I would like to be able to incorporate this into a Raspberry Pi project (home security camera). Specifically I would like to turn ...
7
votes
3answers
47k views

Using single 5V relay (jqc-3ff-s-z) - safety advice required

Above is relay I'm using and everything works as expected using diagram below. I will add 1n4148 diode on IN line for safety and will connect VCC to power supply before Pi. Can I use ground (GND) ...
5
votes
1answer
620 views

Sainsmart 12V, 16 Channel relay module connected to RpiZW has unwanted triggering when booting

I'm trying to get the hydrosys4 open source irrigation control software to work with my 16 channel relay board and raspberry pi zero w. When the pi boots up the relay is triggered multiple times, ...
0
votes
1answer
248 views

How to connect more I2C sensors on top of a RPI shield

I'm struggling with a problem, how to connect more sensors on top of this raspberry shield => https://sixfab.com/product/raspberry-pi-nb-iot-shield/ The shields schematic can be found here and it ...
0
votes
1answer
2k views

Raspberry Pi 2 and SH1106 OLED

Abandoned post by Unregistered user. I am trying to get a cheap SH1106 1.3" OLED from eBay working with my Raspberry Pi 2. Frm the eBay description, it says that it supports "I2C/IIC ...
3
votes
1answer
59 views

Wiegand wiring guidance on Pi 4 with voltage step-down

Ok so following on from my previous post here. I have decided to start with the Wiegand wiring interface. I've drawn a diagram below to illustrate how I plan to wire everything up. Would appreciate if ...
0
votes
2answers
27 views

Should indicator LED's be wired in Series with active GPIO driving pins or on their own GPIO pins

I'm building a fairly complex Raspberry Pi project that includes several sensors and driver motors for a garden automation system. Ideally, I'd like to have LED's that indicate the status of sensors/...
0
votes
1answer
38 views

What is the name and specs for the RPi CM 4's GPIO connectors?

I want to use a compute module for a personal project; but I don't know the name of the connector that is used for the GPIO/SPI etc. It is the one pictured here In the spec sheets, I see the pin out ...
0
votes
1answer
150 views

Wiring multiple I2C sensors to Raspberry Pi using breadboard or wiring

I am new in prototyping with Raspberry Pi. I am using a Raspberry Pi 4B. For a project I want to connect 3 I2C sensors to it (AS7262,BME688 and AS7263. They connect to the same pinns (pins 1, 3, 5, 6, ...
0
votes
2answers
679 views

What "wiring" pin numbers on Pi Zero pinout diagram mean

On the below diagram I understand what position (on the board), GPIO (abstract Pi GPIO numbers) and BCM (SoC pin numbers) pin numbers mean, but what's the meaning of the "wiring"?
0
votes
1answer
41 views

Flow meter circuit and low pulse count

simulate this circuit – Schematic created using CircuitLab I have a very simple circuit that uses a hall effect sensor to measure water flow which then in turn sends pulses to GPIO 13 on my PI. ...
-1
votes
3answers
944 views

pwm fan on pin 18 help!

Can someone help me? I'm trying to control a fan using PWM and I cannot work out how to do it. This worked for a short amount of time and then stopped working. According to the docs, GPIO pin 18 ...
1
vote
1answer
49 views

Proximity sensor reads not working

I'm trying to read output from NPN proximity sensor: but from the GPIO pin I don't read any state change: unfortunately I can't read anything from it cause it seems to fluctuate even if I set the pull ...
1
vote
4answers
1k views

Using single 5V relay module (jqc-3ff-s-z) - Asking for help

I have a developer background missing the electronics background. I read some threads with great interest: Using single 5V relay (jqc-3ff-s-z) - safety advice required and 5V relay (jqc-3ff-s-z) I ...
1
vote
0answers
68 views

making a DC motor spin both ways

I week ago, I got my raspberry pi, connected it to a DC motor, and made the DC motor spin using python. now, I'm trying to get the motor spinning both ways. I have tried but failed. What is the best ...
0
votes
3answers
13k views

How do I do a basic MOSFET switch with Pi?

I have my GPIOs doing PWM with pi-blaster. Now I just need to figure out the wiring. I checked over electrical engineering, and found this question: https://electronics.stackexchange.com/questions/...
1
vote
1answer
52 views

how to wire up a 12V solenoid valve without alligator clips [closed]

I have got a very beginner question. I am building an irrigation system and so I need to use a 12V solenoid valve. My question is as follows: Given the following valve and in particular the contacts (...
2
votes
2answers
90 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 ...
0
votes
2answers
250 views

coin acceptor location instability (electricity)

i'm a software developer and a noob in electronics. I've built a photobooth for a friend of mine that runs by an ice cream stand. The wiring is like this; Coin acceptor | --> signal --> voltage ...
3
votes
2answers
5k views

Rpi to Arduino Serial UART Communication Tutorial

I'm trying to connect my Arduino to my Raspberry Pi using the GPIO pins. I understand that the Pi uses a 3.3V signal while the Arduino uses a 5V signal so I bought a bi-directional logic level ...
3
votes
2answers
3k views

Rpi GPIO Controlling 5V Relay Problem

I am working on a project that requires a camera analyzing some images and activating the appropriate GPIOs to control a relay board. I currently have a touchscreen display, a Raspberry Pi Cam ...
7
votes
4answers
9k views

Controlling a water valve

Here's what I'm looking to do and I'm having a hard time wrapping my head around the electrical/wiring part of this: I have a 1" PVC pipe. I want to put a valve inline with this pipe and with my ...
0
votes
0answers
718 views

ST7789 Display on Raspberry PI 3

I just got an ST7789 240x240 display and i can't get it to work with my PI. i'm using this library: https://github.com/DjamesSuhanko/Python_ST7789 i installed all the python dependency's When i ...
1
vote
1answer
2k views

What would the wiring look like for the UV Sensor Breakout - ML8511?

I have a Raspberry Pi 3 Model B. I am planning to connect an ADC (analog to digital) converter called the MCP3008. I will follow the diagram that is shown here (scroll down past the enabling SPI step)...
1
vote
1answer
115 views

Raspberry Pi GPIO and Relay Newbie Learning Problem

I'm a beginner with electrical circuits right now, so I apologize if this might sound a little riduclous. Let's say if I have a switch device that's controlled by two wires. Can I use a Raspberry Pi ...
0
votes
1answer
416 views

GPIO Output Pin Reverse Current/Higher Voltage

I have a device with a built in voltage divider and opto-isolator. I need to send a pulse to from the RPi GPIO output to the input pin in the circuit. The output from the optic-isolator goes to an ...
1
vote
1answer
69 views

Is this the correct way to connect this set of components (gardening application)

The project is one where I want to monitor and log Soil pH Soil moisture Room Temp Room Humidity Shown in the diagram are: Capacitive soil moisture detector 3.3-5.5V link ADC1115 to convert soil ...
1
vote
1answer
404 views

Is it safe to use 3V3 on raspberry pi 3B+ to control a 3V DC motor?

I want to connect power to a 3V DC motor straight from 3v3 GPIO. Is it safe or will I brick my Pi 3B+ ?
1
vote
0answers
679 views

RPi.GPIO + single channel relay + solenoid lock

I'm working on my first python/hardware project and I want to create a simple (or at least I thought it was simple) cabinet lock, which will lock/unlock when certain RFID tags are approached to the ...
1
vote
0answers
49 views

128x64 LCD install to Pi Zero W

This is my first Rasp project, so please be understanding. I have Raspberry Pi Zero W and 128*64 dot china LCD. I do not have any program done for the screen yet. When start my Rasp only backlight ...
2
votes
1answer
54 views

Need Help with Controlling Some LEDs with a Raspberry Pi

I'm mainly trying to follow this guide here in order to connect some LEDs to a Raspberry Pi. I've read other guides as well, but this link is where I got the majority of my setup done. I've never used ...
0
votes
1answer
335 views

Trouble with Flex Sensor and MCP3008

I'm working on a project currently, though things aren't quite working so I would like whoever's advice. So, to put it briefly, I'm using a Sparkfun Flex Sensor and an MCP3008 hooked up via a ...
16
votes
3answers
22k views

Wiring diagram software

I am looking to document a hardware project my company is putting together. It consists of a Raspberry Pi prototype board and some basic circuitry. The tutorials on raspberrypi.org have very nice ...
2
votes
0answers
172 views

(Wiring) RPi 4B laptop keyboard

NOTE: Not that I've chosen a few wired keyboards, I'll accept an answer that explains HOW to (easily) wire a keybard to the pi - it cannot obstruct the use of a small fan powered by the GPIO. I'm ...
3
votes
1answer
5k views

GPIO pin wiring for LEDs and their resistors

I have a Raspberry Pi 1 Model A and am trying to control an LED from an app that I will be running on it. The wiring I'm planning on going with is: Even though thats a RPI 3 in the diagram above, the ...
0
votes
1answer
240 views

Need help powering a raspberry pi thermostat using 24v power from the unit. I have it working plugged in usb

I have a raspberry pi thermostat that is plugged in through USB. Dealing with this voltage I don't want to "try and see what happens". My current setup is the Pi is powering the relay module through ...
2
votes
1answer
416 views

LED button doesn't work

I have tried connecting a LED with a button like this (from "Adventures in RPi"), but with the far end of the button plugged at G (instead of F). And I ran it with the following Python program (by ...
3
votes
2answers
10k views

Triggering a solenoid off GPIO

this solenoid is killing me! I have it connected to a GPIO pin, and I've tried running it both from that to 3.3v, and to GND. Either way, with Low or High written to the pin, respectively, it doesn'...
1
vote
1answer
532 views

Wiring GPIO pins to press hardware button on USB MOUSE

i have soldered out buttons and replaced them with wired in USB mouse. Mouse itself is connected to device. Is it possible to wire those cables to GPIO in Raspberry PI model 2. And control clicks via ...
1
vote
1answer
94 views

How can I get the image recorded from a rear-view camera?

I have a rear-view camera (NAVITEL MR250) which I use everyday. I got into image processing and I thought a good personal project would be to create a "self-driving car" (Quotation marks because I ...
0
votes
1answer
1k views

How do I debug an LED strip that isn't working?

I've scoured the forums here and elsewhere and can't exactly figure out what my next step should be. I've followed this tutorial https://tutorials-raspberrypi.com/how-to-control-a-raspberry-pi-ws2801-...
0
votes
0answers
166 views

Multiple SDA/SCL | Getting 16x32 RGB LED to work with MCP23017?

I am close to completing a device which will have a 16x32 led matrix as well as quite a few lights/buttons/sensors. All these lights and sensors go through an MCP23017. I am using the Adafruit led ...
3
votes
1answer
673 views

Strange I2C behaviour

First of all: sorry for the title, I don't know how to describe further... Background: I'm working with the RDA5807M FM receiver chip. It worked fine for at least one month now. I just had jumper ...
0
votes
0answers
32 views

Motor-Potientiometer read and write, additional power source

I want to get and set values for a motor potentioneter ALPS RK16812MG from a raspberry pi. I found a similar approach here however, the answers in that forum suggest a different wiring with an ...
1
vote
0answers
503 views

Connecting Raspberry Pi to old found TFT display

I have an old car DVD player sitting around that has a fairly decent secondary TFT LCD screen (hannstar 721h440b19-a1) that I thought I could use with my Raspberry Pi 3 Model B. I opened up the unit,...
7
votes
1answer
653 views

How can I wire a Raspberry Pi to an 8-relay board in a tidy professional manner?

I want to connect a Raspberry Pi to an 8-relay board, such as this one. Together with ground and power this amounts to ten wires. One option to connect the two is by using female to female jumper ...