How to set PWM frequency to 1 Hz on an UNO - Arduino Forum
Nov 29, 2018 · I would like to set a pwm output on my UNO to run at a 1 Hz frequency and then, by analogWrite, set it at 10% or 90% dutycycle. Can that be done? If so, how do I do it? The …
What is a 1 Hz blink? - Programming - Arduino Forum
Oct 6, 2025 · what even is a 1hz blink? A blink cycle that repeats exactly once per second. Hz = repeats per second. The blink cycle you created repeats once every two seconds, so 0.5Hz as …
Blinking at 1HZ - Programming - Arduino Forum
Nov 30, 2019 · Hi, I have to do this task for an assignment. Write a program that turns on an LED attached to Pin3 for 5 seconds then turns it off. The light should stay off for 3 seconds and …
Connecting DS3231 RTC SQW pin to Uno R3 - Arduino Forum
Dec 20, 2024 · I want to use a DS3231 real time clock module to send 1Hz pulses into an Arduino Uno R3 digital interrupt pin 2. The RTC module is a no-name brand. It says HW-084 on the PC …
ds3231 SQW enable 1hz practicing - Arduino Forum
Sep 24, 2018 · Hello, i am learning how to use I2C, speccially with ds3231 for starting, there are a lot of libraries to make ds3231 work but i want to learn from scratch, i´ve been readiing some …
Opta PWM limitations - Opta - Arduino Forum
Mar 12, 2025 · PWM 1 and 4 work fine down to ~1Hz. This behaviour was tested/could be recreated with standard PWM example code in IDE. Has anyone observed such behaviour? is …
DS3231 and SQW: unable to change output frequency beyond 1Hz
Sep 7, 2017 · A DS3231 connected over I2c can be programmed to output a 1Hz square wave (rtc.writeSqwPinMode (DS3231_SquareWave1Hz);) or nothing at all ( rtc.writeSqwPinMode …
DS3231 RTC Board Without a Battery - Arduino Forum
Aug 4, 2023 · Is it OK to use a DS3231 board without a battery? I am a newbie just starting out with Arduino, and need accurate fairly long term timing for my Nano stepper motor project. I …
ESP32 - What is the minimum PWM frequency? - Arduino Forum
Aug 21, 2020 · The esp32-hal-ledc.h file has the following prototype: double ledcSetup (uint8_t channel, double freq, uint8_t resolution_bits); You could try and just set the frequency to 0.5. …
Frecuencímetro con Arduino de 1Hz a 3Khz
Jun 13, 2012 · Aquí os dejo un programa que hace del arduino un frecuencímetro de 1Hz a 3Khz. Con este programa se puede hacer también un detector de tono, un tacómetro óptico, cuenta …