A digital-to-analog converter (DAC) is a system that converts a digital signal into an analog signal.
Questions tagged [dac]
12 questions
3
votes
2 answers
Why are there extra steps on DAC output?
Testing the DAC on the Feather M4 Express (SAMD51 microcontroller). Tried to generate a square wave with the DAC.
void setup() {
analogWriteResolution(12);
}
void loop() {
analogWrite(A0, 0);
delay(1);
analogWrite(A0, 4095);
…
misk94555
- 133
- 4
3
votes
1 answer
Creating a sine wave with a DAC and feeding it back
I want to produce a digital sine wave, send it to DAC0, and then receive it back as input on A0 and plot the graph. I am using an Arduino Due. I wrote the following code:
#define maxSamplesNum 120
#define Sample 50000000/maxSamplesNum // sample for…
Sam Thornton
- 45
- 5
2
votes
1 answer
Fast PWM: Resolution in hertz
I am trying to get a nice sounding varying PWM to DAC, and intend to use a Sallen Key as part of an active low pass filter.
I set the Fast PWM at a max of 255 (WGM1[0-3] = 5) and set/clear OC1A upon comparing with OCR1A (1<< COM1A1)
I also update…
B7th
- 167
- 8
1
vote
3 answers
How can I create a short (0.5us) electrical pulse (50mV amplitude)
I'm working on a charged particle detector consisting of a plastic scintillator and a SiPM to create an electrical signal and I'm using an arduino with an ADC to detect these pulses.
I'd like to create a circuit which can emulate the pulse from the…
Milfod
- 11
- 1
1
vote
0 answers
Audio range with custom waveshape
I am planning to use several Arduino to produce audio range analog signals. I need to use custom waveshapes generated on the fly. As far as I understand, there are two paths:
Aquiring a DAC, but can I send instructions fast enough (the Arduino…
huhu roro
- 11
- 1
1
vote
0 answers
Proper wiring for a HiLetgo DAC to Arduino
I have been having trouble finding any recourses for a DAC chip that I bought. It is the HiLetgo PCM5102 DCA.
https://www.amazon.com/gp/product/B07Q9K5MT8/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
There are 6 ports to be routed. VIN, GND (I…
Jacob
- 111
- 2
1
vote
0 answers
Using ESP32 to measure vbat
I'm using ESP32 to read an analog value of a liPo battery (3.7v-4.2v).
Since ESP32 DAC's is 3.3v I'm using a voltage divider ( 2x10K resistors ), to split bat's voltage into ESP's GPIO36. So far nothing new or not well documented on the web.
Using…
guyd
- 1,049
- 2
- 26
- 61
1
vote
1 answer
Multiple variant.cpp entries for same physical pin
Some variant.cpp files have more than one entry that points to the same physical pin. For example (from Arduino Zero's file):
// 14..19 - Analog pins
// --------------------
{ PORTA, 2, PIO_ANALOG, PIN_ATTR_ANALOG, ADC_Channel0, NOT_ON_PWM,…
Andrew M.
- 145
- 6
0
votes
0 answers
ESP-C3 Super mini MAX98357A and SD Card Reader together
After a lot of research and minimum results about pin mapping and particular specific configurations for SPI and I2S on ESP-C3, i about to give up on this.
I have recently bought ESP32-C3 Supermini because of its size and versatility, but i'm facing…
0
votes
1 answer
Arduino and DAC
this might be more general electronics question, forgive me if this is not the correct place to ask.
I am atempting to use the arduino and MCP4725 breakout board to inject 4 different voltages into an existing line that comes from V1.
V1 is the…
amet
- 3
- 1
0
votes
1 answer
MCP4725 I2C address
I want to use four of MCP4725 DAC module at the same time but it only has two I2C addresses which can be set via jumpers:
In page 10 of the datasheet it says:
Device Address Selection pin. This pin can be tied to VSS or VDD, or
can be actively…
ElectronSurf
- 814
- 4
- 17
- 43
-1
votes
1 answer
Generate a sine wave with a predefined frequency and amplitude via DAC0 or DAC1 with Arduino Due
Good Morning to everyone,
I am a PhD Student in experimental fluid mechanics at the University of Naples "Federico II", Italy. I am working on Arduino Due card and i am novel in applications using it. First, I need to generate a sine wave with…
