Questions tagged [wiring]
Items referring to physical wiring. For question to the wiringPi library use the tag wiringPi.
122
questions
3
votes
1answer
33 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
26 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
32 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
100 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, ...
4
votes
1answer
428 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
2answers
173 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
34 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
vote
1answer
45 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
60 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 ...
1
vote
1answer
46 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 (...
0
votes
2answers
195 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 ...
0
votes
0answers
639 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
111 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
348 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
63 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
368 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
605 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
44 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
49 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 ...
2
votes
0answers
150 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 ...
0
votes
1answer
223 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 ...
1
vote
1answer
500 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
92 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 ...
2
votes
2answers
79 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 ...
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 ...
3
votes
2answers
4k 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 ...
0
votes
0answers
154 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 ...
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
476 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
645 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 ...
0
votes
1answer
116 views
DS18B20 device not showing
Things I've tried:
Replacing the DS18B20 twice (First one was a different brand than the other 2)
Using:
modprobe -r -a w1 w1-therm
modprobe w1 pullup=1
modprobe w1-therm strong_pullup=1
Checking ...
7
votes
2answers
640 views
Creating jumper leads from ethernet cables - connect multiple components
I've bought some crimpers and a dupont connection kit and I'm planning on reusing some old cat5 ethernet cables I have.
Is it reasonable to connect two devices to the RPi via the 8 wires in the cat5 ...
1
vote
2answers
1k 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 ...
0
votes
1answer
290 views
Controlling button on YwRobot with Raspberry Pi
I am obviously new to Raspberry and Stack, but would be great if community can advice.
My setup is the following:
- YwRobot 545043 power supply (controller) connected to the breadboard and to the ...
2
votes
2answers
713 views
Do I need a resistor to wire my Pi Zero directly to a power source?
I want to connect my Pi Zero directly to a 5V 10amp power adapter (shown below) which in turn connects to a wall outlet. I know that with LEDs you can't just connect it directly to the power source ...
0
votes
1answer
238 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
624 views
How to wire up a LED Matrix with a Raspberry PI
I'm not sure how to wire up the LED Matrix corrctly. I followed the steps in this guide: https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/wiring.md In this tutorial the matrix has 3 GND pins. ...
1
vote
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 ...
-3
votes
2answers
96 views
Can somebody please tell me how to wire this?
I litterally cannot find it anywhere on how to wire this
https://www.adafruit.com/product/2934
The only thing any of the pigrrl schematics show is connecting wires from b1,2,3,4 to pins on another ...
2
votes
1answer
2k views
How to wire an HC-SR04 without a breadboard?
I have a Raspberry Pi and a HC-SR04 integrated circuit for measuring distance. I have found many resources for how to connect the HC-SR04 to the GPIO of the Raspberry Pi, but because the HC-SR04 ...
1
vote
1answer
110 views
Wiring a RGB LED on to a Raspberry Pi
So I got a bunch of these LEDs and I can't seem to figure out how to wire them. This is what I'm working with.
I tried adding the gnd and 5v but it doesnt do anything. When i connect the Din to 5v ...
1
vote
1answer
589 views
How can I use Garage Door Safety Sensors with Raspberry Pi?
I am trying to use garage door safety sensors as a way of counting cars. From my understanding, if there is no object (car) between the sensors, then they output a 3.3V signal every 6 milliseconds. If ...
0
votes
1answer
180 views
Flow Meter connected RPI 3 wiring [closed]
Is the wiring the same from a RPI B+ to a RPI 3 to connect a the flow meter too? If you strip the connector to just bare ends from the flow meter what cables/connectors do you recommend purchasing for ...
2
votes
2answers
3k views
Potentiometer on 16x2 LCD, does it need to be connected to VCC?
I am following this Adafruit tutorial on 16x4 LCD, and I managed to make it work.
https://learn.adafruit.com/drive-a-16x2-lcd-directly-with-a-raspberry-pi/wiring
From this tutorial, the potentiometer ...
0
votes
1answer
968 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
1answer
326 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 ...
1
vote
1answer
239 views
Wiring a SNES Controller to pi3 gpio or tactile switches
I'm looking to build a super pi boy, in the original they use tactile switches. However, I'm not sure how to wire the tactile switches and make them work as a x b y up down left right etc. I'm also ...
1
vote
1answer
1k views
How do I connect this anemometer to a Raspberry Pi? [closed]
I want to connect an anemometer to my Raspberry Pi 3.
I'm trying to use the Maplin N25FR Wind Speed Sensor.
How do I connect it to my Raspberry Pi?
I found this picture online, but I don't ...
5
votes
4answers
2k views
"Blinking" relay by toggling pins between input and output
Edit for searches:
This question is about using a 5v relay with Raspberry Pi GPIO pins that outputs 3.3v.
There are a number of great questions below, read them through to understand whats going on. ...
