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Mq7 Module for Accurate CO reading
Hi everyone! I've been working on a research project for my program. I wanted to measure the air quality of the surroundings of our region. I plan to measure Carbon Monoxide levels and Particulate...
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Recurring Updates to ESP32 Time on LED Clock Using NTP Server
For several months, I have been trying to get my Arduino sketch to connect to wifi, obtain time from an ntp server, update the ESP32 internal time, display the time on an LED clock, and disconnect...
View ArticleRGB LED Randomization when button clicked
Hello, I want to create a program that controls 10 RGB LEDs. When a start button is pressed, 5 random LEDs should light up blue. The user then has to select the correct buttons (10 buttons total and...
View ArticleConnecting LED with external power
Hi , I want to see wiring to connect my LED two wired to Arduino nano and external power (3.3v each) but dont know how to do it as I replaced this with small LEDs -ve wire to ground and +ve wire to DC...
View ArticleCnc shield nano
Can I control the cnc shield nano with uno card ? 7 posts - 2 participants Read full topic
View ArticleControl 28byj48 stepper with AccelStepper.h for making Star Tracker
Hi all, I am new in this forum and also in arduino coding. Right now I have made a Star Tracker using 28byj48 stepper motor, arduino nano and some gears. Its basic function is its shaft rotates 1...
View ArticleComputation of power
How to compute the power need to prototype using arduino? How to know the voltage an apms needed to supply the prototype? 3 posts - 3 participants Read full topic
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ESP32 SD library Code not working correctly
I am using an ESP32-WROOM-32D (it says ESP32-DevKitC V4 on the back ) and I tried to program a sort of file navigator via the Serial Console in the IDE to interface a SPI SMT SD Card since you can't...
View ArticleDMM reading differences
Dear All, for my lab, i'm building a 4 channel power supply, with two digital DC buck converter (0-36V) and two analog (from different suppliers) XL4015 with display DC buck converter (1.2 to 36V) . I...
View ArticleOpta error code:1
Hy to everyone, i just installed arduino PLC IDE and Arduino-PLC-IDE-Tools to program OPTA PLC. I connect with USB-C to PLC and choose the com port, but when i try to download, i have always same...
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ESP 32 Touch pin issue
With this code in built-in 0example below // ESP32 Touch Test // Just test touch pin - Touch0 is T0 which is on GPIO 4. void setup() { Serial.begin(9600); delay(1000); // give me time to bring up...
View ArticleBankable element - MIDI Channel Btns
Hi, I'm in the process of building a controller for Arturia Synclavier V and I use banks to control the 12 partials which are on 12 MIDI channels. I'm using the Control_Surface library and I know I...
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Help me diagnose how I broke my MEGA 2560
Hi everyone, I just commit the ultimate cardinal sin and burnt out my board (working on it while the circuitry was live). I am trying to diagnose the exact reason this would have happened, so if...
View ArticleEsp32_relay x1_v1.2
Hi Folks, Complete noob here. I'm trust trying to find this board in IDE but I'm really struggling. Any advice please? It has an ESP32-WROOM-32E on it 8 posts - 2 participants Read full topic
View ArticleCan LOCAL defined Strings cause memory problems?
Hi everybody, my knowledge about Strings (the one with capital "S" scratches only the surface. I have read some discussions and some "tutorials" about Strings. As far as I have understood re-assigning...
View ArticleInput registers programming - Sanity check
Hello guys, I am trying to write some line of code for a project I am working on. The project is a multi-HID button box based on arduino leo and input shift registers to increase the number of inputs....
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Continuity check for model rocket igniters
Hello Arduino Community, I want to build a model rocket flight computer, that ignites a model rocket motor using a standard model rocket igniter. My idea is that my Arduino Pro Mini(the 3.3v version)...
View ArticleEsp32 and Base64
Hello, i'm beginner I need use Base64 with esp32 devkitc V4 but the code not compile and show error: Base64' was not declared in this scope Allready installed the lib that i found on the lib manager...
View ArticleHow to combine these two?
Hey all-I am trying to make a project which involves a pulse sensor sending output when the BPM is over 90 to an API bot through whatsapp. I have each of these up and working, but I have no idea where...
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Generating 3 Phase SPWM (Sinusoidal pulse width modulated ) waveforms having...
I need to generate 3 phase SPWM using arduino where i need 6 output waveforms from Arduino, 3 waveforms of 3 phase 120 degree shift and and other 3 complement of those. Im using the code given below....
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