Questions tagged [wiring]
Items referring to physical wiring. For question to the wiringPi library use the tag wiringPi.
23 questions with no upvoted or accepted answers
2
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35
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Moisture sensor gives weird results when connected to a relay
I was about to review the items as faulty when I connected my brain and made a second test.
The sensor is supposed to return 0 when dry and 1 when wet. In my script I repeat the reading 100 times. I ...
- 21
2
votes
2
answers
437
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GPIO Button Wiring
Edited:
Question re-written
Hello,
So I am looking to build a system that will have around 400-500 input buttons. These buttons are basically used to select an option so only 1 button will ever be ...
- 21
2
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0
answers
272
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(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 ...
- 65
1
vote
1
answer
111
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DS18B20 randomly dissapear from the devices list
I have 4 DS18B20 sensors connected to a Raspberry Pi 4, with a resistor of 10kOhm.
All of the sensors randomly disappears from the w1/devices.
In config.txt the dtoverlay=w1-gpio as well as the ...
- 11
1
vote
0
answers
1k
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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 ...
- 11
1
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0
answers
114
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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 ...
- 23
1
vote
0
answers
881
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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,...
- 11
1
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42
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Wired IR with CIRT1/2 for Calypso CA-1000
Is it possible to do IR over wire with a Calypso CA-1000 amp?
It has an IR receiver and wired IR in/out ports (IR out for daisy-chaining) and looks for CIRT1, 2, and custom codes.
I would like to be ...
- 11
0
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0
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45
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Using a direct signal to open/close a gate
I have a LiftMaster gate opener, to which I would like to add something like a Raspberry Pi so that I can control it from my phone over the internet. The manual for my gate opener (p. 51) shows a ...
shay
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121
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GSM1: No answer, put_command expected (OK)|(ERROR)|(0)|(4)
smstools3's /var/log/smsd.log keeps giving:
GSM1: Checking if modem is ready
GSM1: -> AT
GSM1: Command is sent, waiting for the answer. (5)
GSM1: No answer, put_command expected (OK)|(ERROR)|(0)|(4)...
- 161
0
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0
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219
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HC-SR04 Ultrasonic Sensor Heating Up and Not Working
I have two breadboards (for the front and back of a go-kart) which are supplied by the 5V power pins of the raspberry pi 4 respectively (pins 2 and 4). However, when both are plugged in, the second ...
0
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0
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55
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Raspberry Pi direct wiring connection problem
I wrote some code to activate a video when a motion sensor detects movement.
So far everything works while everything is wired to the breadboard.
When I connect my motion sensor to the Pi itself, it ...
0
votes
1
answer
137
views
What's the best to control a motorized valve: 2 or 3 wires command?
I need to control a bi-stable motorized valve. I hesitate between two types of wiring:
Inverse polarity of 2 wires to open or close: I can do it with two coupled relays. Does it hurt to do it with ...
- 109
0
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0
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70
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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 ...
- 127
0
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0
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194
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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 ...
- 7
0
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2k
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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 ...
0
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0
answers
223
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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 ...
- 27
0
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0
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35
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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 ...
- 121
0
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218
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Controlling M35SP-9T stepper with UNL2003
I would like to control a recycled stepper motor with UNL2003.
I bought a downloaded a sample script from here
Created a test circuit, and the controller is working fine with the 28BYJ motor.
I did ...
- 103
-1
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1
answer
21
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Need wiring help to use a Raspberry 4B with a Mac, Octoprint and Longer LK5 3d printer
I know where to apply the 5 volts for power. So far it appears that a cable is supposed to connect the 3D printers USB port to one of the Raspberry Pi 4B USB ports.
An SD card plugs into the Pi 4B but ...
-1
votes
2
answers
310
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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 ...
- 99
-1
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2
answers
541
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RPi pin being tripped by static electricity?
I'm writing a program that will run a timer until the user plugs a wire into two ports and presses a big red button. At home, my program works pretty well, but when many people are in the same room, ...
- 111
-1
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3
answers
342
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Basic questions about inputs/outputs on a breadboard (Pi 3)
I have started my first basic project today and I have a few questions I couldn't find answers to yet or I just don't know how to search for any. Sorry if those questions seem a bit stupid, but I will ...
- 1