Questions tagged [input-device]

An input device is any peripheral that provides input to a computer, such as mice and keyboards.

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44
votes
6answers
14k views

How can I determine if a given touchscreen is compatible?

I want to attach a touchscreen to my Raspberry Pi. While doing some internet search about this, I found out that this is not trivial, because not all touchscreens are compatible. How do I find out, ...
43
votes
7answers
43k views

Speech processing on the Raspberry Pi

I want to do speech processing on Raspberry Pi to detect specific people (something like unique identification). I would prefer to use only the on-board processor for this, you could assume that ...
33
votes
2answers
107k views

USB card as my default Audio Device

I purchased a small USB sound card. My Pi recognizes the device: $ lsusb Bus 001 Device 004: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller If I run alsamixer and set the audio to USB ...
28
votes
3answers
77k views

Simple Keyboard Configuration

My USB keyboard was configured slightly wrong. So far I have only tried it with the Debian image. Certain keys were not in the right place (such as the '~' character). I know how to change the ...
27
votes
4answers
11k views

What qualities should I look for in a small, 7“ or 10” monitor?

Hi, which small small and portable monitors would you suggest to combine with Raspberry Pi. As Raspberry Pi is part of huge range of different project please suggest which would be best in each of ...
26
votes
3answers
123k views

Raspberry Pi 3 audio input?

Did Raspberry Pi 3 add audio input? I'm new to RPi and interested in doing speech recognition but noticed input has been missing for previous versions. If it hasn't, what is the best way for me to go ...
15
votes
5answers
32k views

Forward mouse and keyboard input to X session

I'm accessing my Pi via SSH. My network is too slow to actually forward the Pi's desktop back to my laptop, so I have a monitor connected to my Pi. When I startx through Putty, I see the desktop on ...
12
votes
2answers
6k views

Why are there delays and input issues when using my wireless keyboard?

I booted up my Raspberry Pi for the first time and I plugged in my USB dongle for my wireless keyboard and mouse. It booted up fine but when I type keys either don't appear on the screen or they ...
8
votes
2answers
4k views

5V sensor to Raspberry PI

If I have a sensor which has 5V ouptut: I can't plug it directly to Raspberry PI, right? If so, what would I need to do so I would be able to do so? I would like to connect it via input pins.
8
votes
1answer
2k views

How to write device tree overlay for analog device touchscreen ad7879 i2c

I wrote a device tree overlay for driver ad7879-i2c touchscreen (compiled as module using Raspberry Pi source, files: ad7879-i2c.c, ad7879.c). Driver gets loaded but i guess parameters are not passed ...
7
votes
4answers
22k views

Creating an HDMI Pass-Through Connection

I would be very interested to know if anyone on here might be able to provide some insights into the feasibility and/or proper approach to add a HDMI input to the Raspberry Pi in an effort to allow ...
6
votes
2answers
781 views

Wireless USB Touchpad not working as mouse. Why?

I have recently bought a Logitech T650 wireless USB touchpad. This touchpad works fine in the Raspbian desktop environment. But when I run some applications, this mouse doesn't work inside the ...
5
votes
1answer
3k views

UART RX stops reading data after working correctly

I'm trying to read an continuous stream of data from my device (laser altimeter). The device is connected to the UART Rx pin of raspberry Pi 3B+. Everything works fine with this python code: import ...
5
votes
1answer
822 views

Use different sound card for microphone vs audio output

I recently bought a USB sound card to improve the audio output on my pi while continuing to use my USB microphone for audio input. The problem is that I do not know how to configure the pi to use the ...
5
votes
2answers
3k views

Raspberry Pi USB microphone 1 Khz background noise interference

Using this microphone I have some severe noise in the background. The more peripherals I plug in (camera, gertboard, wi-fi adapter) the worse the noise becomes. We've tried several different power ...
4
votes
1answer
14k views

Using an Android phone or tablet as a keyboard or mouse

There are many remote apps to let Android devices control XBMC installations. Is there anything that would act as a generic keyboard or mouse, to allow an Android phone to control Raspbian, ...
4
votes
0answers
349 views

Custom camera driver

Is it possible to write a driver, say for a OV camera, based on the existing drivers at the RPI git repo? As is I understand, with a datasheet for a sensor it should be possible to write a similar ...
3
votes
2answers
4k views

Adding microphone support to the RPi 3B

I own a Raspberry Pi 3B and want to extend the sound capabilities. So what I need is sound output for speakers and headphones via a 3.5mm phone jack. In addition to that, I want to add an internal mic ...
3
votes
1answer
660 views

Logitech K700 keyboard doesn't show up in /dev/input

With the Logitech K700 keyboard/mouse device plugged in to the raspberry pi, if I check /dev/input/by-path only a mouse shows up. I can still type in the terminal, but the keyboard device doesn't seem ...
3
votes
1answer
5k views

Is there any way to use a joystick as a mouse?

In order to cut down on connected devices, is there any way to use a connected USB gamepad as a mouse? Bonus points to anyone who can make it also act as the keyboard. As a clarification, the ...
3
votes
0answers
70 views

USB Audio Interface not recognized

I've got an IKMultimedia IRig Pro Connected to PI4B It appears in Jack under ALSA-MIDI but I can't find the System-Audio Input Running lsusb shows me Bus 002 Device 001: ID 1d6b:0003 Linux ...
3
votes
0answers
162 views

raspi MIDI in audio out

I have a MIDI controller keyboard, that I want to take with me to a vacation. For some reason I cannot bring a tablet/laptop with me. I still have a Raspberry Pi 2B lying around so I thought it might ...
3
votes
0answers
225 views

Adafruit Retrogame library will not send character press events

I'm trying to build a small arcade cabinet powered by the Raspberry Pi 2. I've got several arcade buttons (for ABXY, Insert Coin/Select and Start) and an 8-way joystick. I'm following the tutorial ...
3
votes
2answers
981 views

Toggle on/off with a push button (WiiMote)

I want to make a on/off signal with only a push button, actually its for my WiiMote but I don't think that that makes a difference. I want a led to turn it on and off. I was thinking about a counter ...
3
votes
0answers
132 views

Connecting a touch panel display to the Raspberry Pi? [duplicate]

Possible Duplicate: How can I determine if a given touchscreen is compatible? I have two choices of touch panel display to connect to my Raspberry Pi: Reach Technologies SLCD43 Amulet ...
2
votes
1answer
99 views

Why is pull up resistor preferred over pull down for the matrix keypad?

I'm programming the in- and outputs of a 4x4 matrix keypad for the RPi in order to print the pushed key's value (a letter). In order to (first) read which row was pushed, the tutorial tells me to ...
2
votes
2answers
203 views

Material that can be used as a switch for an LED

I am currently working on a project that turns on a simple LED. However, instead of flipping a switch, I want a material that can be touched that will act as the switch. Below is an image that is ...
2
votes
1answer
1k views

Arcade buttons on GPIO, multiple buttons on the same ground pin

I have noticed that while hooking up arcade buttons to the GPIO set on the model b board that along with the joystick I should be able (by assigning certain GPIO pins to ground) to connect 7 other ...
2
votes
2answers
5k views

Set up C-media USB soundcard for microphone input on Raspberry Pi 2 with Raspbian Jessie

I would like to use Amazon Alexa or Steven Hicksons Voicecommander (uses Google) on my Pi to automate some tasks by voice command, but I am having trouble getting the microphone to work in the first ...
2
votes
1answer
745 views

3.5" TFT Calibration Problem

I am struggling to understand what is going on with my (knock-off) Waveshare 3.5" TFT calibration. For my application, I need to have the display and the touch screen rotated 180 degrees. Flipping ...
2
votes
1answer
375 views

GPIO input voltage from sensors - need clarification

I apologize if this has been answered, I couldn't find any definitive answer. I wanted to connect ultrasonic range sensor (based on this tutorial http://www.modmypi.com/blog/hc-sr04-ultrasonic-range-...
2
votes
1answer
213 views

How to connect Pi to a homemade board, and communicate with it?

I'd like to make a small "MCU" consisting of a camera, a mic, some LEDs, and probably a cheap ARM CPU. I'm calling this my "SMIC" (streaming media IC). I'd like to connect this SMIC MCU to a ...
2
votes
1answer
2k views

Real time audio input for use in Python program

I am working on some audio manipulation with my RPI and have a question on how I should process the signals. Right now I have a USB adapter with an Audio In and an Audio Out. What I would like to do, ...
2
votes
1answer
78 views

Camera not in /dev/ how to create one

Does someone know if it's possible to create a new "/dev/video0" with some informations (e.g idVendor, idProduct, ...). Our problem is that when we plug in our camera, it doesn't create a "/dev/*" ...
2
votes
3answers
3k views

Disable or catch touch screen events

I have a RPi 2 set up as a kiosk with the official touch screen. On startup, the user will need to enter some input using the touch screen, but then I want to display an external web page in full ...
2
votes
1answer
4k views

Is it possible to record an RCA signal with the Raspberry Pi?

Does anybody know of a way to record the RCA video output from a security camera with the Raspberry pi? I know that the Raspberry Pi has an RCA output, but this won't work for recording. Would an RCA ...
2
votes
0answers
370 views

Numpad keys don't throw KeyEvents under JavaFX on RPi3 [closed]

While programming a JavaFX application for the Raspberry Pi 3 using the official JavaFXPorts from Gluon, I encountered the following problem: Pressing the numpad keys on my keyboard doesn't give me ...
1
vote
3answers
352 views

Generating alternating current from GPIO – is it a misuse?

I've built a simple joystick for my RasPi 3 Model B. When making it, I tried to minimize the number of its GPIO pins, and ended up with a design that uses 3 pins. However, I'm afraid I'm about to put ...
1
vote
1answer
1k views

GPIO Voltage tolerance for input

I have not been able to find the input tolerance on I/O pins, especially on the Input pins. If I apply a voltage 3.6v (3.3v +0.3) on an input will it be dangerous or is it ok ? Does somebody have a ...
1
vote
1answer
227 views

Error when connecting more than ten USB devices on Raspberry Pi 4 [duplicate]

What is the limit of USB devices in raspberry pi4? We have an external USB hub with its power supply and 10 devices fall off with errors. [Wed Mar 11 09:04:43 2020] usb 1-1.3.4-port1: Cannot enable. ...
1
vote
2answers
939 views

One speaker system, multiple inputs

I have a speaker system in my living room which gets audio from aux-input (it doesn't have bluetooth) and I have multiple devices that wants to use it: my computer, laptop, phone... I thought about ...
1
vote
1answer
998 views

Using a remote control without Lirc

I own a Snapstream Firefly IR remote control with a USB receiver. Connecting the receiver and using NOOBS to perform a fresh install of Raspbian, the Raspberry Pi receives input from the remote ...
1
vote
1answer
55 views

How to overwrite the inputs in Retropie for specific emulator/rom?

I have a Pi3 flashed with Retropie connected to a Switch Controller via USB. The controller mapping seems off. I can't seem to play in KOF97 properly. I want to remapped it. Right now it mapped ...
1
vote
1answer
69 views

aplay/arecord device order changes every reboot

I have a couple of different applications running that rely on knowing the audio or recording device at startup, but every time I restart my raspi, the order of the devices changes. Looking for a way ...
1
vote
1answer
1k views

Taking input from a MyoWare muscle sensor with a Raspberry Pi Zero

Our robotics class is making a robotic hand that takes input from muscle sensors. We have a Raspberry Pi Zero and are trying to take muscle activity input from a MyoWare Muscle Sensor. The program we ...
1
vote
1answer
357 views

Connecting digital output device directly to pi's gpio

I recently purchased four of these SW-420 based vibration sensor modules, and am following along with this question: Python code for SW-420 vibration sensor. I am brand new to circuitry and want to ...
1
vote
2answers
13k views

PyAudio does not detect my microphone connected via USB audio adapter

I am using the latest Raspbian I just downloaded this morning. I bought this USB audio adapter, https://www.sossolutions.nl/usb-audio-adapter-works-with-raspberry-pi. And then I followed tutorial ...
1
vote
1answer
2k views

Raspberry PI 3 reading input value with push button

I am new to Raspberry PI. I am following button tutorial from adafruit site. I have the made the connection needed but when I execute the code the following part is not returning values as expected ...
1
vote
1answer
31 views

What do I need exactly

I have a raspberry pi, but is there a list somewhere of all the other input/output items I need, such as a mouse etc? And can you specify if they need to be wired or not? Thanks.
1
vote
1answer
3k views

Can the rpi get audio input through usb?

I currently have a rpi that gets audio through wifi streaming to deliver through a DAC hat to an audio amp+speakers. But the number of operations I have to do to stream audio through wifi (from a ...