Tagged Questions

The conversion of signals from analog to digital.

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1
vote
1answer
40 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 ...
3
votes
4answers
176 views

Sound card for raspberry pi?

Can anyone recommend the best way of recording audio input? Are there any "sound cards" for raspberry pi's? Edit: I've seen Linux software for ham radio. And see that debian wheezy has a whole lot of ...
3
votes
1answer
157 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 ...
1
vote
1answer
319 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 ...
0
votes
0answers
34 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 ...
1
vote
0answers
234 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 4.5v minimum. Before I configure the ADC for 5 volts I ...
0
votes
1answer
159 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
1
vote
1answer
168 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 ...
0
votes
0answers
58 views

Output composite video from laptop using raspberry pi - possible? [duplicate]

I built a media-center with my raspberry pi a while ago, and I am now putting together more ambitious ideas for improving it. I recently fixed a broken laptop (with good specs) and want to use it as ...
0
votes
0answers
153 views

How much data throughput can I get through an ADC using SPI and python?

I would like to implement a project using a raspberry pi to do fft cross-correlation calculations in scipy from up to four different microphones using an ADC (like the MCP3208) on SPI. The functional ...
0
votes
1answer
256 views

Pcf8591 (AD/DA) module I2C , does it work with RPi?

Most of the RPi modules and equipments available online, are not available locally, This is the only ADC that is available locally to me. I'd want to know if it is compatible to use with Raspberry Pi ...
3
votes
2answers
556 views

What is the best way to increase digital i/o lines on Pi?

In one of my project I need 6 PWM outputs, 12 digital IO and around 6 analog inputs to be controlled by PI. What are some of the best options available to increase the IO capability of PI? For PWM, I ...
2
votes
1answer
936 views

Using Pi's built-in audio as general-purpose DAC?

Any common Audio output on any electronic device is in essence a two-channel Digital-to-Analog converter, where the voltage sent to each of the channels (Left, Right) powers the electromagnet that ...
0
votes
0answers
121 views

RasPi + TFT monitor (over HDMI), but not sure if it is DVI-A input

Are there TFT monitors, which accept only DVI-Analog and thus not usable with a simple HDMI-to-DVI connector cable (i.e. which does not have the D/A conversion circuitry) ? My local IT store has a ...
1
vote
2answers
4k views

How to get an SPI Analog-to-Digital (MCP3204) working with the GPIO?

I have an MCP3204 12-bit Analog-to-Digital Converter (ADC), and a Raspberrypi. Does anyone know what I need to plug where to get them to communicate? Is there an SPI python library I can use? O am ...
4
votes
1answer
334 views

AD7705 analog to digital converter with RPi, viable?

I have a couple of AD7705 chips I'm attempting to use with my RPi to read the analog pins from a sensor that spits out 0~4V. Nice, detailed datasheet for the ADC is here: ...
9
votes
7answers
11k views

Is Pi powerful enough for an oscilloscope project?

My goal is to make Pi based instruments, starting with an oscilloscope. So I read answers to What Analog to Digital Converters Are Available For RPI? How can I connect an analog to digital ...
5
votes
1answer
1k views

What Analog to Digital Converters Are Available For RPI?

I am interested in obtaining an ADC (Analog to Digital Converter) or Analog input for the Raspberry Pi. I understand that various boards exits to use an Arduino as input to the Pi and that Libellium ...
12
votes
7answers
9k views

How can I connect an analog to digital converter (ADC)?

I'm looking at options for ADC on the Rasbperry Pi. I'm wondering what is possible so far. Of course easy and cheap is good.