Questions tagged [hat]

A "hat" is an add on board designed specifically to fit on top of the pi via the GPIO header. They have a small EEPROM chip which is used to configure them, but may be built to serve any purpose.

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How to detect what kind of HAT or GPIO board is plugged in - if any?

I am setting up some Raspberry Pis for use in demos to colleagues, in order to show off capabilities of the Pi itself, and of some of the add-on boards that are available. I would really like to be ...
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ADC Hat with 8 differential channels and 24 bit resolution for 100 - 200 SPS (Hz)

I'm sorry if there's a similar post, I could not find it (them). As the title implies, I'm looking for an ADC hat for the Rapspberry Pi 3 Model B with 8 differential channels to sample up to 200 SPS (...
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Pimoroni Speaker Phat i2c and using the pins

Is it possible to use the pins on top of a raspberry pi hat that uses i2c? I am trying to use the Pimoroni Speaker Phat and control a motor using GPIO at the same time. Thanks for any replies.
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Configure ALSA Sound card

I have 2 playback device where one is HDMI and the other is HAT sound card. The requirement is to play audio from card 0 or 1 without rebooting the system. aplay -l **** List of PLAYBACK Hardware ...
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No response from RFID HAT

Model: Raspberry Pi 3 Model B Vi.2 HAT: RaspberryPi-B1 v1.3 I just bought RaspberryPi Hat RFID/NFC board (RaspberryPi-B1 from ib technology). I've spent all day trying to get a response from it, but ...
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1answer
251 views

Do i need more gpio pins?

Newbie here, I'm sorry if its a stupid question. I have a project in which I need both touch input and LED output on my Raspberry Pi zero w. The LED output (Neopixels) will need the 5V, the GPIO18 ...
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Is it possible to have a correct sound using iQAudio PI-DAC+ and Volumio?

I have bought the excellent Pi-DAC+ to use it with Volumio in an old radio I have. In this radio, the speakers are marked as 6 ohms impedance. This radio used to provide a rather good sound. But with ...
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Has anyone tried connecting a adafruit hat board and an LCD Screen?

We use the Raspberry Pi 3 boards for an elementary school robotics program. We saw these cool Kuman 3.5" touch screens that said they were HDMI (which I assumed meant they connected directly into the ...
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Same lipo power source for raspberry pi and motor hat

I am building a rover and would like to power the Raspberry Pi and the Motor HAT with the same power source. I want to use a 2500 mAh LiPo battery for a long play time. My DC motors work at 6V-9V. ...
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569 views

Google AIY Kit compatibility

I wanted to combine the google kit with a relay board to allow voice controlled power outlets on my Pi 3 model B. Is it possible to use a relay and the google hats at the same time? I can’t find ...
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1answer
524 views

Help with Wiring Multiple HATs to GPIO

first time poster. Sorry in advance if this is the wrong place/title/etc. I'm currently working on a senior design project for mechanical engineering, but it requires some basic electronic controls. ...
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Raspberry Pi Sense HAT on Rpi 3?

I have a question to ask you guys. Can I use the Raspberry Pi Sense HAT (the one used in Astro Pi) with the Raspberry Pi 3 without having any kind of problems? Thanks in advance!
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arecord throw Input/Output error

When trying to run the following command, I am getting Input/Output error pi@raspberrypi:~ $ sudo arecord -Dhw:1,0 -d 10 -f cd -t wav test.wav Recording WAVE 'test.wav' : Signed 16 bit Little Endian,...
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1answer
379 views

Pi 3 can't detect servo hat

Super new to this. Attached the Adafruit 16-Channel PWM / Servo HAT for Raspberry Pi to my Pi 3. All solder connections look good. Booted up the Pi, ran through the tutorial. After tutorial, the hat ...
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How to approximate room temperature in a better way

I've just bought an Enviro pHAT. The temperature sensor on my pHAT reads around 31 degrees Celsius for my room This sensor is close to the Pi, so it also gets a heatwave from the CPU Is there a ...
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Raspberry Pi abruptly “dies” when I apply physical pressure

I have been using my Pi B2 since 2015. I recently got a Sense Hat, but it behaves extremely weirdly when I use it. For example, I used the mini joystick, which applied slight pressure to my Pi. Then,...
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1answer
708 views

pHAT DAC 3.5mm solder pins

Like many others, I have been working on a handheld gaming system using a Raspberry Pi Zero. One of the downsides of doing this, however, is that it has no sound built in, other than through the HDMI ...
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501 views

Raspberry pi HAT device-tree

I'm currently developping a Raspberry pi HAT. The Raspberry pi HAT must contain a EEPROM with several information in it. This information will be read at boot time in order to configure the Raspberry ...
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1answer
171 views

Raspberry pi HAT id Vendor id Product origin

I'm currently developing a Raspberry pi HAT which I will eventually sell in the future. According to the official documentation the EEPROM memory of the HAT must contain several information. Two of ...
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1answer
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EEPROM Raspberry pi HAT read

I'm currently designing a Raspberry pi HAT. A HAT need to have an eeprom memory on it with several information. This memory is read at boot time of the Raspberry pi. My question is the following: ...
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252 views

Hat making I2C unusable

I bought this Pi hat for integrating an Arduino with the Pi and exposing all the GPIO pins through nice GVS headers, and overall I'm very happy with it. However, I'm noticing a weird problem. Without ...
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2answers
359 views

Simultaneously use a HAT and breakout on a Raspberry Pi 2

I'm starting a project for an internet-controlled model vehicle. I have a Raspberry Pi 2 Model B to serve as the core. I have been researching the components I need and the main 2 that have stood out ...
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209 views

Powering RPi3, 3G Dongle, DC Motor HAT and DC Motors

I've got a setup where I power RPi, 3G dongle from one power source (USB Hub powered from 5V 2A) and a DC Motor HAT and DC Motors (2 small car mirror motors) from a 12V 2A supply. I checked the motors ...
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Disabling Hat EEPROM scan

How do I free the Hat EEPROM I2C bus (bus 0?) on a + model? I ask because the primary bus is blocked by an TFT I'm using, and I want to solder nothing to the Pi GPIO.