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Questions tagged [arduino]

Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.

1
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1answer
45 views

BJT-piloted MOSFET circuit: Feedback requested

I had the idea to make a power converter, and I would like some feedback. I can take constructive criticism. The basic idea was to make something where a microcontroller could drive a power MOSFET, ...
0
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2answers
35 views

Avoid voltage feedback from laser psu to Arduino via pwm pin [closed]

I have been using GRBL software on arduino board for quite a while now, however the only issue I have is that the CO2 laser PSU kind of passes a small current back to the Arduino from its control pins,...
0
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3answers
48 views

using the Atmega328P

if I take the micro controller (ATmega328P) from the Arduino board and simply place it on to a breadboard, do I still need to upload the boot loader ?
0
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0answers
54 views

I2C pull-up on multiple devices? [closed]

On my device there are two boards with 10 kOhm resistors between i2c and 5V. This is SparkFun level shift and LCD screen. Do I need to have a pull-up in the chain in only one device?
2
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1answer
75 views

Arduino UNO disconnects from computer when connecting it to a breadboard from specific holes

I am a complete beginner in electronics; I started learning using Arduino yesterday. There is something strange happening with the Arduino UNO board. The Arduino board is connected to my laptop and ...
0
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1answer
43 views

Can the location of the inductor on the board affect the operation of the microcontroller?

I have a voltage regulator, based on LM2596, in its circuit there is an inductor on 33uH. The question is, can this inductor be a source of interference? Next to him, I plan to place the Atmega328P ...
0
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1answer
59 views

Arduino 2 power source - auto switch?

I'm planning to switch between two power sources DC and USB with an Arduino like below diagram. What I'm going to do is cut off the DC V+ wire when I insert the USB jack to the Arduino for uploading ...
0
votes
0answers
15 views

Why wifiManager.setTimeout(60) is not working? [migrated]

in this code I am using wifiManager.setTimeout(60); so that when it fails to connect to the wifi it should restart. However, wifiManager.setTimeout(60) is not working at all. It get stuck and display ...
1
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1answer
70 views

Reduce Noise Added With Zener Clipper

I'm working on a hobby Arduino project to create an audio visualizer using an LED strip. I'm using the MSGEQ7 to separate the signal into 7 bands, then send it to a Wemos D1 Mini. I started by ...
0
votes
1answer
40 views

Transform small Arduino protoboard project in a final solution

I am collecting data on consumption and solar production and I centralize it in a Raspberry with Openhab. Now I want to connect to Smart Grid Ready and/or Power Control of a Panasonic Aquarea ...
0
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1answer
55 views

Powering Arduino Uno with 9 V LiPo batteries

Would it be safe to use two 9 V LiPo batteries in parallel to power an Arduino Uno?
0
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1answer
45 views

Wiring a power supply, arduino, and LED strip together?

I've been researching various websites on all of my questions and have found answers to many of them but I am also finding conflicting answers for some of them. I've read that electricity is something ...
1
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0answers
54 views

How to rotate a square on a TFT ILI9486 screen with Arduino

Problem Summary I have a “square” rotating on my 3.5 Inch TFT screen (ILI9486 driver) with dots/circles at each of its 4 corners. It is connected to an Arduino MEGA 2560 There are a few issues with ...
0
votes
1answer
51 views

Feeding AMS1117-5V with 3.3V [closed]

I need that an Arduino NANO clone work with 3.3V. Can an AMS1117-5V give 3.3V if supplied with only 3.3V? edit: current consumption is 400mA max. the AMS1117 output current is 800mA.
0
votes
0answers
12 views

Servo motor rotates back to 0 after reaching destination [migrated]

I am using a XMG-996R servo motor. It is controlled by and Arduino Uno board. The problem is when I tell it to go to a certain angle, it will rotate to the desired position but then return to 0. The ...
1
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0answers
124 views

Arduino: incorrect calculation of long integer [migrated]

I'm doing a simple calculation with integers (on Arduino with ESP8266 12E), but I can't get the expected result and can't find the error. Can someone guide me? ...
1
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0answers
29 views

Interface with wired alarm using Arduino or similar

My house is equipped with a wired alarm system that's missing the hardware controller board. Whats left is a number of sensors (NC) and the wiring to a central location. Cable lengths are anywhere ...
1
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1answer
107 views

What does “Run Power and Ground wires back to the Arduino” mean?

An Adafruit article showing people how to wire up an RGB LED to an Arduino UNO has the warning shown below on its page. For longer strips requiring more than 1 Amp, wire the power directly to the ...
-1
votes
1answer
49 views

How does G-code determine what pins I used to set CNC motors at? [closed]

I want to develop a simple C# application to control a self-made CNC machine using Arduino Uno. I want to use G-code to accomplish that. Now what I don't understand is how G-code is interpreted in ...
0
votes
2answers
66 views

What am I doing wrong? COB LED with LED Driver

I am relatively new to electronics and I am trying to turn on a Bridgelux BXRC-50C2001-D-74COB LED (Digikey listing, Datasheet ) using a 500mA Mean Well DC-DC LED Driver (LDD-500LW). The LED Driver is ...
0
votes
0answers
42 views

Creating a library for arduino [migrated]

I found a really nice 24 bit I2C adc which was fairly cheap as well (ADS1219) but as far as I could tell there are no libraries for it so I decided to make my own. I have managed to write functions ...
2
votes
1answer
163 views

Level shiffter (3.3V / 5V) for controlling transistors

Is it possible to control the base of the transistor using the level shift chip (3.3V / 5V)? I want to use the SN74AHCT125 level shift chip. Transistor BC337-16
1
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1answer
56 views

5v 10amp powering arduino and LED strip

I need my 5v 10 amp power supply to power both my LED strip and arduino. I will have the LED strip directly wired to the power supply, then for the arduino I have two ideas - either cut a USB cable ...
0
votes
1answer
71 views

Arduino Circuit for High Power LED + Servos

I'm new to the Arduino game, but have experience with electronics in general. I am hoping to hook up two servo's and a high power (1W) LED up to an Arduino, to control them. Due to my inexperience, I ...
1
vote
1answer
32 views

Arduino battery power stay on for button - Not quite working

I have been trying to get a circuit to work that would power an Arduino from a set of 4 18650 batteries. It needs to turn on with a button press, then stay on for 30 seconds, then completely power ...
2
votes
1answer
199 views

Logic Level Conventer for UART 5V / 3.3V with high transmission speed (115200)

I need to connect ESP32 (3.3 V) and Arduino UNO (5 V) on the UART bus. I used to connect two devices through a 1k resistor and it worked. I want to make a reliable connection. On the Internet, I ...
0
votes
1answer
44 views

Should I use constant current or constant voltage drivers for driving my PWM 24V DC Fans?

Hi everyone thanks for stopping by to lend your thoughts. I need to run 2 circuits separately and control via Arduino uno PWM. One circuit is 2x Noctua NF-A14 industrialPPC-24V-3000 Q100 IP67 with ...
0
votes
1answer
59 views

PWM speed control of 24V DC Brushless Pump

I would like to PWM speed control a 24V 2A DC Brushless Pump using an Arduino for my nano-brewery project. I've been searching for a Speed controller on Amazon or Ebay. But, i either find brushed ...
0
votes
0answers
38 views

Power Arduino from MicroSD host and more

There are a lot of cheap MicroSD port extender flex ribbons from China. These things extend the MicroSD port quite a lot. I thought it would be cool to adapt these to power an Arduino from a phones ...
1
vote
2answers
90 views

Does this prototype match the schematic?

I'm following this project which shows how to make an OpenTherm Adapter for an Arduino. It includes this schematic: Along with this simplistic PCB diagram: I am now in the process of making my own ...
0
votes
2answers
72 views

Choosing a resistor for connecting a bipolar transistor

I need to run some LEDs using Arduino. The total current consumption is about 190 mA. For these purposes, I found a bipolar transistor PMBT2369 (Nexperia). Transistor characteristics: - Maximum ...
1
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1answer
61 views

Arduino serial communication hacking

I recently bought a Chines massaging chair hoping i can intercept the serial communication between its wired remote and the chair itself, I've cut the wire and connect the Rxd and Txd of the chair to ...
1
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2answers
69 views

Extend number of PWM pins on an arduino?

How do I extend the number of PWM pins on an Arduino without using software solutions, I need 32 to drive 32 mosfets? Thanks!
1
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0answers
59 views

PT100 sensor for measuring liquid resin, fully submerged

Edited Link to Pt100 sensor (That's the best i could do) https://www.intech.co.nz/products/temperature/mrh.html Link to ESP8266 datasheet http://www.handsontec.com/pdf_learn/esp8266-V10.pdf ...
1
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1answer
93 views

How to connect LED driver to arduino

How do I connect 2 of these LED drivers to Arduino? http://www.starchips.com.tw/pdf/datasheet/SCT2024V01_03.pdf This is what I have so far, im connecting each output to a N-channel mosfet. Im not ...
1
vote
2answers
88 views

Do i need a LED driver to drive 32 mosfets? [closed]

Im trying to use two 16 channel LED drivers to drive 32 mosfets, im not understanding the datasheet about current sinking, maximum voltages etc. Are they meant to drive the LEDs by themselves? ...
0
votes
0answers
29 views

LCD 18 (6 x3 ) Pinout without Datasheet AW -60i LCM V4.1

I have this (18 X 3) LCD Pins, I need help to find the Datasheet or the pinout for it. AW -60i LCM V4.1
-2
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0answers
18 views

Arduino Modbus - Rtu slave with Raspberry pi using MAX-485 [migrated]

I am trying to use Arduino as Modbus- RTU slave and Raspberry Pi as a Modbus master I have interfaced Max485 (RS485 to TTL converter) with Arduino and Rs485 to USB converter in Raspberry Pi, Initially,...
1
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0answers
34 views

mosfet as a switch on arduino pin and xbee explorer board 5v

I have looked at various examples of MOSFET switches but I am not knowledgeable enough to adapt what I see to what I would like.... I want to have a pin on my 5 volt Arduino Micro board turn on or off ...
0
votes
1answer
58 views

Tactile touch button design using pull up resistor

As you can see on my github https://github.com/mancio/Volante-The-Gamepad I'm designing a gamepad with analog axes and digital touch buttons using pull-up resistors My pull-up resistor switch works ...
1
vote
2answers
68 views

ORing for Arduino Mini Pro

I am attempting to make an alarm on AC main failure based on Arduino Mini Pro. The idea is that when AC main failure happens the Arduino Mini Pro shall wake up and periodically "beep" between "...
0
votes
1answer
64 views

Arduino and 3W LED sharing the same power source, is it possible and how?

I've built a remote control for my 3W power LED with an Arduino UNO and I'm powering the Arduino with a USB cable and the LED with 4x AA NiMh batteries (1.2V). Is it possible to power both my Arduino ...
1
vote
1answer
67 views

CAN Controller + PIC32

I have been trying to design a functional board which combines the hardware of the Elecrow Arduino Uno CAN bus shield with a microcontroller board, which functions like an Arduino except with ...
2
votes
1answer
78 views

When I write data to a BLE Characteristic (FFE1) to send data over bluetooth, is the data encrypted?

I have a very simple circuit which includes a HM-10 that exposes a CC2541 Bluetooth device. simulate this circuit – Schematic created using CircuitLab It's basically just hooked up to power ...
0
votes
2answers
55 views

Choosing the ground for circuit

Can the GND pin of the Arduino UNO be used as a ground instead of the negative terminal of a battery while using a battery as the power source? If no, do we have the liberty to choose our ground for ...
0
votes
1answer
86 views

What can I use to turn on a circuit at 5V?

I'd like to power an Arduino using a supercapacitor. I already have that part of the circuit figured out. But I want to charge the supercapacitor using an external power source, without the ...
0
votes
1answer
60 views

Servo motors twitching , arduino Mega [closed]

I am working on a school project: a robotic arm controlled by an Arduino Mega board, 6 servo motors: https://hobbyking.com/en_us/power-hd-lw-20mg-servo.html?___store=en_us 1 PC power supply (450W), ...
0
votes
3answers
76 views

Correct use of op-amp to amplify photodiode in reverse bias

So I have a photodiode in reverse bias, from which I intend to measure my pulse. Currently, my schematic looks as follows: simulate this circuit – Schematic created using CircuitLab Weirdly,...
0
votes
1answer
51 views

replacing smd atmega328p on a arduino nano clone

I accidentally blown up the original chip. :embrassed I have successfully soldered a new chip on but the MKII programmer won't enter programming mode. but I can clearly see the characterisic not ...
1
vote
1answer
61 views

Please check my DC / DC schematic. ST1S40

I want to make a voltage down converter to power my controller (Atmega328P). Input = 12V / Output = 5V (3A). As a converter, I use ST1S40. My connection diagram I took the circuit from datasheet, ...