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Questions tagged [analog-digital-converter]

Anything related to analog-to-digital converters (ADCs). ADCs are hardware devices that convert analog signals to digital signals.

Anything related to analog-to-digital converters (ADCs). ADCs are hardware devices that convert analog signals to digital signals.

These devices are extensively used to interface digital equipment (such a computer or a microcontroller) with the external world, since they allow, when coupled with suitable transducers and signal-conditioning hardware, to convert any continuous physical quantity to a number representing its value.

See the Wikipedia article on ADCs

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Simple OCR of Analog Video (VGA) Signal

Does anybody know about a product or an open source project that would do OCR (Optical Character Recognition) of a VGA stream? The VGA screens are very simple, numbers and strings in fixed locations. The screens do not change too often, or when…
Radim Cernej
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Frequency of the signals transmitted & modulation scheme (FSK, ASK)

How is the frequency of the signals transmitted reflected on the modulation scheme (eg: FSK, ASK)? Say if I want to transmit a sequence of signal with a frequency of 20kHz(an amplitude of 7V is 1, no amplitude is 0), is there any requirement of the…
Stephanie
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How to wire/connect multiple sensors to Arduino

I would like to connect two sensors to Arduino Mega, but I don't how to connect the pins. My two sensors have 0-5V Signals, each with a positive and minus cable. Should I connect the positive cable to each A-X pin of arduino (e.g. A0 and A1) and…
Hangon
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Unexplained Conversion from a binary/hex within code

I am using code from the Waveshare website ( for use with the ADDA Waveshare board put on a RPi3 ) :…
Sam Bob
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Problems with PIC A/D conversion

I am trying to read analogic signal for a sort of mouse with a pic18f14k50 controller. Here the simple circuit: http://dl.dropbox.com/u/14663091/schematiconew.pdf . I have to read analogic signal from AN9 circuit port. Main function reads from the…
Emilio
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matlab to transform audio from analog to digital

I need to record an audio from my laptop and transform it from analog to digital then transfer it to another laptop in the same network to transform it from digital to analog and listen to the audio file normally. I know that I should use the UDP…
Ahmad Ali
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How to do analogRead() in AVR assembly language?

If I need to be specific: I'm asking about ATmega328P chip. The analog pins are under PortC on this chip. I have learnt that digitalWrite can be done using out, and digitalRead using in. But how can I do analogRead ?? Please explain. I'm new to…
AneesAhmed777
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BeagleBoneBlack Analog Input Files Does not Exist

I want to make a simple project using BBB.I am following these steps from Web Site but there is no "AIN1" file on my BBB Screenshot and i don't understand where is the problem.
coollime
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Computation during analogRead on Arduino

The Arduino A/D converter takes about 0.1ms according to the manual. Actually, my tests show that on an Uno I can execute about 7700 per second in a loop. Unfortunately analogRead waits while the reading is being performed, making it difficult to…
Dov
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Calculating the maximum physical rate (Nyquist performance limitation) of an ADC onboard a microcontroller

I'm trying to evaluate the maximum physical rate (Nyquist performance limit) of the A/Ds integrated on board various PIC microcontrollers. However, to do the calculation requires parameters that I'm not finding explicitly stated in the datasheets,…
Assad Ebrahim
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Generate square wave for analog input/output on software

I have a device, and it has digital i/o, analog i/o. I send to device below commands for communication.The device has gpio module. My device documantation is here Write to digital input : gpio set/clear x Read from digital output : gpio read x Read…
Sdn
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Can't send data to Xively through Arduino Wi-Fi Shield, sending just one stream

I'm doing a project involving uploading data wirelessly, from an analog sensor. In this case it is a light sensor. I am using an Arduino Uno R2, and an official Arduino Wi-Fi Shield. Below is my code: #include #include #include…
Bradeley
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CodeWarrior compiler warning: "Possible loss of data"

Please consider the following code: unsigned int beta; unsigned int theta; unsigned int m = 4; unsigned int c = 986; unsigned int Rpre = 49900; unsigned int getUAnalog(unsigned char channel) // to get the PT1000 Signal { unsigned int…
sheetansh
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What are some good implementation of efforts to digitise an analog dial?

For example, the dial of a watch is analog, in my machine of interest, there is a similar dial which gives the reading for Force. http://www.materialtestingmachine.in/full-images/analogue-universal-testing-machine-771364.jpg I want to install a…
Chintan Pathak
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analoginput, starting in matlab

I am trying to display audio at real time using, analoginput, this is the code: function Cspe() daq_object = analoginput('winsound'); chan = addchannel(daq_object,1); num_samples=1000; …
Rave
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