arduino

Hello! I want to automate my Philips 3300 Series LatteGo coffee machine, and ideally without opening it up and voiding warranty. The cheapest, simplest idea seemed to be remotely activating the capacitive touch buttons on the control panel of the machine. It seems remote activation of...

I am using 6n137 opto-coupler to take engine tachometer 12v signal from ECU, then send it to arduino nano esp32 that in return it drives rev RGB LEDs. I found in the optocoupler data sheet that the minimum input voltage is 4.5V at Vcc. Is it ok if i supply Vcc with 5V and pull up Vo to 3.3V from...

Hello, I hope this is the correct forum; I'm new. So, I have a 7.4v/2800mA/20w battery I salvaged from a portable DVD player that went kaput. I wanted to test the yellow wire (the battery has three wires: red, yellow, and black), which Co-Pilot said was likely connected to a thermistor. Here's...

Hi all, I have basic knowledge in electronic engineering but feel a bit rusty since I haven't been doing this for a couple of years. The project: I've created a PCB to program empty Atmega328P chipset, when connected to Arduino (I'm using ELEGOO UNO R3) It houses a TQFP32 to DIP32 IC test...

So I am making a special curing chamber for 3D printed resins that requires an inert environment. Everything seems to be working but I noticed that the LEDS are pretty dim when running. I have a 12V 3A power supply and I thought I would be in pretty good shape. I wired three cherry MX reds (all...

Hello! After a little back and forth, I’ve decided on trying my luck with RFID for identifying Chess Pieces on a board. I’m thinking of using PN532 RFID readers to identify the tags under chess pieces. These PN532’s would be plugged into their own little microcontroller, and then those would...

help Need help connecting the arduino nano (A1), RTC module (CT1), SD card module (S1), LCD display (L1), and ultrasonic sensor (U1) together

I have a project that requires use of the Arduino Nano or any other microcontroller that gets the job done. It needs to be able to run a 3x10 LED array circuit or circular LED circuit. A RTC module, SD Card module, LCD screen, and a ultrasonic sensor. Is this possible to run on one Nano or...

Sometimes it’s hard to know where to start with getting devices working on a new platform, like I2C keypads, sensors and screens: here’s a writeup that provides some sample code to nicely interface plug-n-play SparkFun devices with a custom OS (NetBurner’s RTOS) with minimal reimplementation...

[EDITED BY MODERATOR MOVING THE FIGURES TO THE BOTTOM WHERE THEY SEEMED TO BELONG ACCORDING TO THE TEXT] Hello everyone, I’ve developed a board that allows levitating a magnet using a feedback control system. It’s powered by a 12V jack and controlled by a Teensy 4.1 microcontroller. Everything...

This is our schematic diagram that we are trying to do. It should count down from 5 to 0 and we ran it in proteus and it works. The only problem we have left is that the seven segment diode doesnt show the correct number of counting. We inserted LEDs for each output of the JK flip flops to know...

This is my first ever shematics and also first time "designin"(lol) a circuit this complicated. The breadboard circuit also doesn't have any capacitors just like the schematics, I'll add them later, but that probably won't solve the problem. The XL6009E1 module is an adjustable boost converter...

I want to make a PCB (based on arduino NANO) for the management of a nanogrid consisting of a PV Solar and Wind Turbine and two storage batteries it has to contain current/voltage sensors along with ADC that send the data to arduino NANO for handling (decision making and Data storage in...

Hello everyone, I am working on a small project using ATMEGA328 (AM for short).. I use a voltage regulator to power the AM and then one of the output pins of the AM is connected to an LED+ resistor and Ground. I power my AM using an L7805 voltage regulator and I noticed that when the ground in...

Hi! I am trying to make my Arduino Nano switch the device where it is currently communicating with (RX-TX) and I want to make it using NPN Transistors (2N3904) to switch from the ESP-01 to HC-06 (Bluetooth). I'm kinda new to this and I made this circuit - for ESP-01 only for now with the same...

Hi, I'm having a hard time finding good resources on connecting an arduino to the internet via a 4G module with a SIM card. Google or YouTube tutorials aren't very helpful either. Can someone recommend some 4g modules that work best with Arduino and are also well documented? Thanks.

Hello Everyone, I'm currently working on a project where I aim to remotely control a 3-phase 22kW water pump motor using an Arduino microcontroller. To achieve this, I'm considering using relays as ON/OFF switches between the Arduino and a contactor that will ultimately control the motor...

Hey! starting my journy on Arduinio.When i tried to connect my joystick, and read the values from it,I gaet the whole range on X. My problem is with Y: Resting pposition indicates 0, and if i move the joystick down it shows the value 512. if I move it upwards, the value does not change. where...

Hi, I am working on a project to measure distance between two objects (A and B) using Arduino. Both these two objects are moving with time among other objects, but there is always a Line of sight available (assumed for now). After some research I concluded to use ultrasonic sensors. My idea is...

I record a timestamp everytime I receive a data frame in udp between an ESP8266ex and an ESP32 such that : if (packetSize) { frame_size = UDP.read(buffer_t, 30); if (frame_size > 0) { timestamp_receive = micros(); data_adc_serial[10] = timestamp_receive; for (int i = 0...