Questions tagged [frequency]

Defines how often something occurs, such as pulses in a digital signal, or oscillations in a radio wave.

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31 views

Arduino, generating smaller frequency than 31Hz

I'm controlling a car instrument panel with Arduino using the tone() function, however with Arduino Uno's minimum 31Hz frequency I can only set the speedometer at ~12mph or more. I'd like to be able ...
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1answer
259 views

ATMega4809 via Nano Every marked as 20Mhz, but does this confirm it is actually at 16Mhz?

If you go to the official Arduino Nano Every page and click the Tech Specs tab, you'll see that it lists it as running at 20Mhz. Turn On Verbose Compile However, if you go into the Arduino IDE and go ...
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1answer
2k views

Why is our refresh rate consistently decreasing in logging on SD card?

The current code is used to gather the state of 12 infrared beams and log them to an SD card using the real time clock to mark the time. The code uses a switch to turn the device on and off and an LED ...
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28 views

FG Frequency output

I have bought the Brushless DC-Flat Motors Series 2610 and Pin number 6 is called FG which is defined as frequency output. I have plugged this pin into the Arduino in A0 and I have tried displaying ...
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50 views

Changing frequency by button press

I have to up the frequency by 100 hz by button press for upto 1khz; I am stuck on using the debounce source code. The problem is every time I press button the value for "i" goes to random ...
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1answer
105 views

analogRead() doesn't read more than 500Hz

I connected a wave generator to the analog pins to read the frequencies of the waves generated. I used different frequencies of sine waves with a minimum of 0V and maximum of 5V. Whenever the voltage ...
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2answers
384 views

What is the maximum frequency input signal that I can accurately track on a GPIO pin?

This all started with me wanting to use an Arduino to make a tachometer. This is all now working fine, but it got me wondering what the highest frequency digital signal that I could read? So I built a ...
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1answer
120 views

Time signal. Determine the presence of pulses and their duration [closed]

I want to detect the exact time signal from an FM radio station. The signal is transmitted in the form of 5 short pulses and one long one. My task is to determine the presence of a pulse in the audio ...
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Is it possible to generate an exact 15 kHz clock pulse using an Arduino?

I want to generate a 15 kHz pulse with an Arduino using Timer1, but the problem is that if we want a 15000 Hz clock we need to initialize the timer with 1/15000 seconds or 66.66 microseconds, but we ...
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3answers
81 views

Recognize peak in specific frequency area

I am wondering if it is possible to attach a microphone to an arduino board and make the arduino recognize a volume peak in a specific range of frecuency's. I want it to detect a specific peak (for ...
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1answer
55 views

How the light brightness stays constant when we increase the frequency of stroboscope

Well I am trying to make a Stroboscop. I found this code at blow: and tried. It works normally. But if I increase the RPM so decrease the "strobeDelay" time, the brightness of the LEDs goes ...
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110 views

How to change the update rate in TinyGPS++?

I am working with TinyGPS++ library and Arduino-nano and I want to change the update rate. I worked before with Adafruit GPS and uses the below code for updating it. // Set the update rate GPS....
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2answers
502 views

Generate 1khz square signal with Arduino Mega

I want to generate a 1khz square signal with an Arduino Mega. I have read the MCU contains several timers. What i want to do is to configure one of this timers. My first question is: Is there a way to ...
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1answer
225 views

Measure audio frequency through pulse duration

Hello dear StackExchange users, i want to develop an Infrared blaster which i can plug into the headphone jack of a phone or console of choice. In order to communicate what frequency to modulate the ...
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0answers
283 views

1.7 MHz generator for a water atomizer

I'm creating a controller for a small greenhouse, I have a DHT22 for measuring and two relay module that controls heating and cooling systems, and I will use a piezo to produce humidity when it goes ...
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1answer
301 views

How to run atmega328p at 8, 4 and 1 mhz?

Instead of using the regular Arduino board I have purchased the atmega328p-pu along with this components: 22pf ceramic capacitor 10K resistor 16mhz crystal 47uF capacitor 3.3 Volts Power supply The ...
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2answers
135 views

How can arduino read a frequency higher than 16Mhz?

I will like to understand how does Arduino measure a frequency. Also how does my voltmeter can measure a frequency as well. Since I am a beginner on using microcontroler I would read a frequency like ...
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270 views

Fading LED with different frequencies

I have a potentiometer attached to one analog port of arduino (assume A0) I'm reading the value of that using input_voltage = analogRead (A0); which is a value between 0-1023. So I want to map this ...
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122 views

Clock frequency VS cycle time

I am considering switching from Arduino Pro Mini 5V 16MHz to Arduino Pro Mini 3.3V 8Mhz for some project because I would like to run it with a 4.5V input power. Will the switch from 16 to 8Mhz double ...
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1answer
35 views

Will an Arduino UNO operating at 16mHz communicate with UART / I2C with an STM32 operating at a different frequency?

I plan to connect Arduino UNO via I2C / UART with a controller based on STM32F334K8T6, whose frequency will be about 20mHz or higher. Tell me, does the difference in clock frequencies of ...
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0answers
65 views

Frequency Doesn't increase when Button Is Pressed

I’m trying to output a frequency that can be increased and decreased by using 2 buttons. I’m trying to first of all configure the first button (which increases the frequency). I’m trying to also add ...
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1answer
123 views

Timer 1 Arduino - Create 2 Timers

I’m trying to output 2 separate frequencies using 2 output pins from an Arduino using the Timer 1 library. A snippet of the code is show below. void setup() { Serial.begin(9600); pinMode(button,...
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1answer
2k views

Trouble with setting the PWM frequency for Arduino Due

I'm using Arduino Due and I set the analog read and write resolution to 12-bit for better resolution. Basically all I do is to vary PWM duty cycle by controlling analog DC input voltage from 0 to 3.3V....
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1answer
1k views

ESP 32 changing frequency instead of duty cycle

Using this code on an esp32 allow to vary duty cycle of the PWM with a fixed 5000Hz frequency and is working fine. My question is how to vary frequency and keep duty cycle on a fixed value? // the ...
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1answer
191 views

Writing Data through Pin at certain frequency

I have an Arduino UNO which is connected to an KLZ25 board, the Arduino sends an 1MHz Clock at Pin 9 and now I should write the PDM-Data with 1 Mhz at pin 8. But i don't know how to write with such a ...
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1answer
276 views

6 channel PWM with 2 - 5 kHz frequency

Is it possible to set all 6 PWM frequencies to a value between 2 and 5 kHz? I've read that the base frequency for pins pins 5 and 6 is 62500 Hz. And the divisors for the pins 5 and 6 are only this ...
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0answers
593 views

Measuring Amplitude/Frequency of sound

I need to read an analog signal at about 500-1000Hz for at least 5 seconds. I've a battery powered microphone wired into an analog and ground pin on my arduino and am trying to measure the frequency ...
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1answer
314 views

making power harmonics analyser which will measure the amplitudes of the fundamental and its multiples (like 50hz, 100hz, 150hz,200 hz,...) there are)

i have been intendng to make a power frequency harmonics analyser which will measure the amplitudes of the fundamental and its multiples (like 50hz, 100hz, 150hz,200 hz,...) there are examples for ...
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0answers
140 views

Sketch works on MEGA 2560 timer2, but does not work on timer1

I set the PWM frequency on MEGA 2560 like this: TCCR2A = 0; TCCR2B = 0; TCNT2 = 0; TCCR2A = _BV(COM2A1) | _BV(COM2B1) | _BV(WGM20); ...
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2answers
357 views

Generated frequency is not as expected

This code sets a pin HIGH for 1 microsecond and then LOW for 1 microsecond. The expected frequency should be about 500 kHz. When measuring the output the frequency is about 96.4khz. Why ? int del = 1;...
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1answer
392 views

Turn infrared LED on and off in order to simulate an infrared signal

Note I am able to send and recieve IR signals. This question is only for purposes of learning. When using the existing library #include <IRremote.h> it is very simple to read and transmit ...
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1answer
179 views

Can I use arduino to generate 8mhz frequency ultrasonic pulses in piezo discs?

void setup() { pinMode(freqOutputPin, OUTPUT); Serial.begin(9600); // Set Timer 2 CTC mode with no prescaling. OC2A toggles on compare match // // WGM22:0 = 010: CTC Mode, toggle ...
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2answers
199 views

How can I calculate approximate cycles per second from pulsed pin on Arduino MKR Zero?

The relevant tech specs for a MKR Zero are: 32.768 kHz (RTC*), 48 MHz *Real-Time Clock What I'm curious about is how I might do an approximate calculation of cycles per second from operations. ...
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1answer
3k views

Changing PWM on Arduino Mega, pins 9 & 10 to 20 to 25 KHz

I'm trying to run a Nema 17 motor with a l298N motor Driver for a school project. The issue is that I am running the motor with PWM to avoid overheating of the driver, however the resulting noise at ...
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1answer
806 views

More than 4 PWM output at 25khz?

Is it possible using an arduino to control more than 4 PWM fan at 25khz ? I have found this but 4 PWM limited with an UNO https://arduino.stackovernet.com/fr/q/8407 An other arduino, like a 2560 ...
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74 views

What might be some reasons this MKRZero circuit and sketch fail to read frequency?

I've built the following circuit on my MKR Zero I've also uploaded, compiled and deployed the code from the associated article (https://www.arduino.cc/en/Tutorial/AnalogToMidi) with no errors. Note: ...
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1answer
848 views

How to increase the volume in speaker using talkie library in arduino uno...?

What else should I add to this code to increase the volume..?? #include "talkie.h" Talkie voice; const int8_t speech[] PROGMEM= {0x00,0x00,0x00,0x08,0xd8,0x39,0x54,0x00,0xa7,0xa6,0x32,0xe0, 0x04,...
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1answer
5k views

Read frequency of input in digital pins

This is a somewhat theoretical question: Let's say I have some sensor that sends digital signals to one of Arduino's digital ports. Now, I don't know the frequency it sends those signals in. For ...
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1answer
799 views

Generating Sinusoid Signal of 40khz [closed]

I would like to generate a sinusoidal signal of 40kHz using Arduino Uno. Maximum I could generate was 1kHz, using bit banging, fast PWM. Do you have ideas of how to boost it to 40kHz? I used "...
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1answer
1k views

Measuring high frequencies (300kHz) with arduino

I'm designing a frequency generator with ICL8038, which would output sine, square and triangle waves, which would reach frequency such as 300kHz. I've already designed a circuit around the ICL8038, ...
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1answer
3k views

Measuring frequency of 3-wire 12V fan on Arduino Uno

I am using a PC 12V fan (40x40mm), which I control speed with voltage (with adjustable power supply). I would like to measure the frequency of the fan with Arduino and read it on serial monitor. I've ...
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2answers
151 views

How to add prefactor to clock frequency at compile time?

I want to use an Arduino Mega at 8MHz because my power supply is bad and I have only 4.3V (no way I can fix that), which is outside the operation range of the ATMega1280 at 16MHz. I think the right ...
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1answer
81 views

Where is CLKPR located on Ubuntu 16.04 with Arduino 1.8.3

I would like to see the definition of CLKPR. I guess that similarly to PORTB and other registers, it should be defined by the toolchain? (see Where is PORTB defined? ) Am I right? Where should I look ...
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1answer
2k views

Arduino Due's clock frequency

I want to change the clock frequency of the Arduino Due. The default value of the main clock, according to the SAM micro-controller, is 4 Mhz. But I found in some forums that it is 84 Mhz. But I need ...
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1answer
80 views

Arduino Due custom platform for school and library installation

I have made a custom-development hardware for our school, where you can plug in an Arduino Due. It is mainly for driving all kind of motors and reading sensor signals. Therefore I added a custom SAM ...
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0answers
19 views

Deceleration time logger between frequencies

i need to measure the air resistance and roll resistance of a vehicle. I plan on using a toothed disc with a proximity sensor which will output a square wave signal in to an arduino. Then I will drive ...
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2answers
944 views

Can I read two PWM signals and output two square waves on an UNO?

My system requires that I read two independent PWM signals (60hz) and output two corresponding square waves. These output square waves vary in frequency according to their corresponding input duty ...
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0answers
230 views

How can I configure the RFM95 LoRa module to emit packets at only 'one' particular frequency?

I have created a LoRa gateway using a Pi3; I have used a RFM95 module for it. So, it is a single channel gateway, and I'm operating it at 868.1Mhz. But my LoRa node(also a RFM95, on an Arduino Uno), ...
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2answers
2k views

Read Audio Data in Real-time over 3.5mm Stereo Cable

My Goal Have Arduino read audio output from a TRS stereo audio cable (coming from a computer, smartphone, etc.). As motivation for this use-case, once some audio data (depending on the sample rate) ...
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4answers
735 views

Problem with the Frequency meter code

I am trying to build a frequency meter using Interrupts and Timer1, which works as if the system receives an Interrupt it would get the timer's data and would calculate Signal's Frequency = 1 / (...