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Questions tagged [analog-to-digital]

For questions pertaining to signal conversion, either through hardware or software.

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A/D Converter Solution

We are working on developing an industrial refrigeration system. The RPi seemed like a good choice based on its ability to run Python and the number of I/Os. We need a fairly large number of sensors ...
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1answer
97 views

I am having trouble executing the code on the raspberry pi to read from the MCP3002 ADC

Hi I am writing a python script to code the raspberry pi to read from the MCP3002 ADC. This is the code that I typed in onto the raspberry pi nano script import spidev import time def readAnalog(...
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1answer
3k views

Raspberry Pi with MQ-2 Gas Sensor

I'm new here and wondering if anyone has set up an MQ-2 Gas Senson with a Raspberry Pi? I was following this article. I was able to get the SPI module loaded/working, but when I go to run the Python ...
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1answer
458 views

How to install wiringPi in Matlab Simulink for interface Raspberry Pi with ADC?

I like to use IC MCP3008 to change analogue signal to digital signal for Raspberry Pi interface with Matlab Simulink. But I getting the error missing file wiringPi.h and wiringPi.c. May I know how can ...
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1answer
197 views

Simultaneous using of Touchscreean LCD and MCP3008 on Raspberry Pi 3

I want to use a touchscreen LCD (3.5" TFT) and a MPC3008 ADC at the same time to monitor data fast and continuously in my project. And I know the data interface of each three parts (LCD, touch, and ...
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1answer
280 views

connect two mcp3002 IC to raspberry pi3 model B

I need use 4 sensor with analog output in raspberry pi3 . in my country we have only mcp3002. I can not get mcp3004. how I can connect two mcp3002 to raspberry pi3 for read data from 4 analog sensor??...
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1answer
338 views

Strange readings when connecting an FSR to Pi using MCP3008

1I have connected a square Adafruit Force Sensitive Resistor 406 up to a Raspberry Pi following the instructions given here: Using an FSR with a Raspberry Pi I have wired everything up exactly as ...
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2answers
972 views

Hardware for reading a large number of analog inputs?

I need to read a total of 64 analog voltages for a project I'm working on. This is a learning project and I'm starting from scratch, so I'm a bit lost. I've considered a 64-channel analog to digital ...
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1answer
465 views

Is it possible to sample 6 microphones at 11 kHz each with a Raspberry Pi Zero?

I am working on a project that requires me to sample 6 microphones as close to simultaneously as possible at a rate of at least 11 kHz each and then run a processing algorithm on the data in real time....
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1answer
885 views

Real time adc for RPI

I'm thinking about a project with RPI. I need 4 or 6 analog inputs with sample rate between 500 and 1000 samples per second and 2 or 4 digital output as response of processing the input signals. ...
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0answers
319 views

reading analog not working

I have a Raspberry Pi3, and I am following this tutorial: http://raspberrypi-aa.github.io/session3/spi.html The code I am using is: #!/usr/bin/env python # # Bitbang'd SPI interface with an MCP3008 ...
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2answers
15k views

Analog to Digital Converter (ADC)

I would like to kindly ask if Raspberry Pi 3 can receive an analog signal directly without using an external ADC? and if I do need an external ADC, what is the best ADC that can I use to have the ...
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2answers
343 views

Can I do anything with a pre-wired photo resistor and no additional A/D converter?

So I have this SunFounder Photo Resistor module: https://www.sunfounder.com/learn/sensor-kit-v2-0-for-raspberry-pi-b-plus/lesson-20-photoresistor-module-sensor-kit-v2-0-for-b-plus.html Until five ...
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1answer
3k views

ACS712 connected to Raspberry Pi through MCP3008

Is it possible to bind the ACS712 sensor in the following way? 5V to 5V Raspberry Pi pin GND to GND pin Out pin to a MCP3008 channel The MCP3008 is an analogue to digital converter. I'm asking this ...
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2answers
1k views

Reading values from MCP3008

First, I'd like to preface the question that I am an electronics noob. I am trying to read and analog signal from an MCP3008 connected on a breadboard connected to my RPi v3 with a Cobbler. On the ...
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0answers
992 views

MCP3008 Installation Issues

CH5 is connected to my AO from my moisture sensor. pi@raspberrypi:~ $ ls -l /dev/spi* crw-rw---- 1 root spi 153, 0 Jun 18 12:13 /dev/spidev0.0 crw-rw---- 1 root spi 153, 1 Jun 18 12:13 /dev/spidev0....
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1answer
642 views

How fast can I read two analogue sensors using MCP3008 ADC?

I need to get measurements of voltage and current using two sensors connected through an MCP3008 ADC to the Raspberry Pi. I need to get the voltage and current waveforms simultaneously and compare ...
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1answer
59 views

Easiest way to listen to analog connection?

I got a MAX 9814 but quickly realized the output is analog and not digital. I found that I could get an Arduino Nano/Micro and connect it to my Pi via a USB to USB-micro cable but I wonder if there's ...
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2answers
664 views

Can I connect any ADC to RPi?

I know that MCP 3008 can provide sampling rate around 100Ksps. I'm looking to connect ADC with sampling rate least 3Msps.
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0answers
629 views

Raspberry Pi Model A+: I2S ADC and DAC connection

I want to connect raspberry pi A+ to external DAC/ADC(audio codec) via I2S interface. Is it possible? If not, what model can I use to perform audio recording/streaming?
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1answer
3k views

Raspberry Pi, LM35 and MCP3008

I want to use Raspberry Pi to measure temperature using LM35 sensors (15-30 Celsius degrees). I can't power up the sensor with 3,3V because it requires at least 4V and also I need about 10 sensors ...
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1answer
1k views

Rasberry Pi 2 analog inputs

I am a newbie with the Raspberry Pi. I want to measure temperature from 16 sensors. Is it possible to have 16 analog inputs? If not what controller should I use, I need something with web server.
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1answer
805 views

Reading an analog signal into the raspberry pi 2

Here's the project I am working on: I would like to read in the voltage change on a sensor that I have. It has a positive and negative wire coming from it. I then have the raspberry pi 2. The positive ...
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0answers
1k views

ADC with Raspberry Pi (16 or 24 bits) with sampling rate of at least 1 MHz

Is it possible to use Raspberry Pi 2 to construct an acquisition system that is at least 1 MHz fast and with 24 bits (or 16 if 24 not possible)? Just 1 channel suffices! Everything I find is either ...
2
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1answer
740 views

Data logging during power loss

My Raspberry Pi, model B, is going to be sent up on a hydrogen balloon to collect data on some solar panels. I've written a python script to collect data from these panels using 3 INA219s connected to ...
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1answer
230 views

Storing data from input pins

I have a RPi and attached to an input pin I have an ADC (MCP3002) and an op-amp (MCP601) and a piezo element connected to them. The RPi reads the input pin, gets the digital data and at the moment ...
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4answers
3k views

Using Pi to read 1 MHz Analog Ultrasound signals

I am trying to use the Raspberry Pi to read in analog signals at 1MHz and I wanted to know how I would go about doing this. What sort of ADC should I buy, and how many? If not ADC, what do I need to ...
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1answer
9k views

how to change read channels on PCF8591

I have a PCF8591 analog to digital converter. I have it reading from AIN0 (thanks to @joan), but I cant find a reference for getting it to read from multiple channels. How would I get it to read input ...
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1answer
4k views

Converting 3.3V input to degrees Fahrenheit

I have a temp sensor (TMP 36) the same one used in the guide I am following here. I have impossible temp output. Anyone know what I did wrong? 216 temp (def F): 116582.0 216 temp (def F): 116582.0 ...
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2answers
932 views

Analog input with MCP3008

I'm trying to connect a Turner C-Sense pCO2 sensor to an RPi2B using an MCP3008 ADC. The probe is powered via dedicated 9V inverter. The probe's analog output wires include a signal out (+) and AGND (-...
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2answers
608 views

Trying to use TMP36 via MCP3008 on Windows 10 iot [closed]

Can't get this working right. Any help very appreciated! I have a TMP36 on channel 0 of MCP3008 analog to digital converter then into my Raspberry Pi 2. My code and wiring is in the zip available at ...
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1answer
1k views

Raspberry Pi as an Upscaller

I have been looking at better ways of playing my old NES/SNES on modern TV's via HDMI. I like the old hardware, I like the controllers and I like hunting down the cartridges so have little interest in ...
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0answers
308 views

Precision ADCs for Raspberry Pi to minimize Gibbs phenomenon?

I would like to generate stable volts from 0 to 5 and to minimize Gibbs phenomenon without losing measurement data. I get much sudden peaks in Raspberry Pi 1/2 which I can control by adding low-pass ...
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0answers
76 views

Has anyone used a Raspberry PI as a double-slope integrating analog-to-digital converter?

I am planning to setup a poor-man's ADC using a Raspberry PI and an operational amplifier wired as a double-slope integrating ADC for extremely low-frequency signals sampling (< 10 Hz). I have ...
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0answers
338 views

RTNETLINK Error with spi communication

When I use both PICAN-CAN-Bus module and MCP3008 with different cs on spi, I receive this message on terminal; RTNETLINK answers: Device or resource busy I tried to configuration can0 and I received ...
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1answer
432 views

How do I read a car turn indicator is on using GPIO

I am brand new to the Raspberry Pi (PM now born-again developer, Pi still in the box etc) and this is my very first ever post so please don't slam me if I use the wrong protocol to ask this question. ...
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1answer
71 views

How can I connect an EasyADC board mikroe340?

I've got a 4-channel 12-bit ADC "Mikroe340" from Mikroelektronika (datasheet). I'm wondering how to wire it with GPIO.
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2answers
795 views

What happens if I try to read an analog pin's value?

I know there is a simple circuit you can make to be able to read an analog pin but what if I don't know if my device's pin is giving me analog or digital? If I try to read from that pin anyway am I ...
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1answer
2k views

MCP3008 alternative

I have some analog devices like LDR, temperature sensors, and other sensors and I want to use the readings of these sensors in my raspberry pi B+ , for that I need an ADC , to convert the analog ...
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1answer
1k views

Sampling on the Pi using MCP3004

I am trying to sample an analog voltage signal on the Raspberry Pi using an MCP3004 ADC. I am using the spidev package and the basic code is something like: import spidev import time list = [] ...
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2answers
803 views

Soil moisture sensor compatibility

Can this sensor for ardunino can be used with raspberry pi b+ model? The specs of the sensor are Operating voltage: 3.3V~5V Dual output mode,analog output more accurate A fixed bolt ...
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0answers
2k views

Raspberry Pi Drum Module

I have an old electric drum set with a broken sound module (the brain that you plug each jack into). As a fun DIY project I'd like to resurrect this drum kit by replacing the sound module with the ...
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1answer
2k views

ADC to capture speech (8khz, 16bit)

I am looking to capture speech and save it as a wav (Wave PCM) in RPi. Ideally the speech should be captured in 8khz with 16bit resolution and saved as a raw file or wav file. I also have a need to ...
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4answers
2k views

Sound card for raspberry pi?

Can anyone recommend the best way of recording audio input? Are there any "sound cards" for Raspberry Pis? Edit: I've seen Linux software for ham radio. And see that Debian Wheezy has a whole lot of ...
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1answer
2k views

Multimeter functionality for raspberry pi

Are there any sensors that would allow me to measure voltage/current/resistance similar to using a multimeter but would allow me to interface with them through a library? (for example, measuring ...
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2answers
4k views

Raspberry PI Audio Input

I am looking to use the GPIO on a Raspberry Pi to get data from an ADC for audio signal processing. For the purposes of this forum, my project is to produce a spectrum analyzer which will display the ...
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2answers
1k views

Least delay for audio processing

I am working on a project that involves real-time audio processing to do noise cancellation, so basically taking input from a microphone, doing processing, and sending out the output. It heavily ...
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2answers
6k views

Using 5 volts on an mcp3008

I have a couple different types of hall effect sensors I would like to test out using an MCP3008 ADC to interface with my Pi. The sensors run on 4.5 V minimum. Before I configure the ADC for 5 volts I ...
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1answer
875 views

Analog to Digital converter

Can I connect a ADC0804LCN to a raspberry pi ? http://pdf1.alldatasheet.com/datasheet-pdf/view/77309/INTERSIL/ADC0804LCN.html
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1answer
1k views

Connecting an etape using spi

I have an etape liquid level sensor http://www.adafruit.com/datasheets/eTape%20Datasheet%2012110215TC-12_040213.pdf hooked up to my raspberry pi model b through an MCP3008. The MCP3008 is connected ...