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Questions tagged [arduino]

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

0
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2answers
50 views

Selection of External Current Transformer

simulate this circuit – Schematic created using CircuitLab I am designing a product for motor protection circuit. where I want to use customized external CT for application which gives me ...
0
votes
1answer
135 views

Trying to increase amperage of Arduino Uno digital pin (20mA) to control a cabinet lock that is rated at 12v / 2A

I am trying to use my Arduino Uno to send power from one of its digital pins to a cabinet lock, the cabinet lock is "fail-secure," so you send power to it to unlock ...
0
votes
0answers
80 views

Buck-Boost Controller Arduino Nano vs STM32

I have 900W (150W*6Panels) solar panels and 12V inverter (1000VA) which have inbuilt PWM solar charge controller. The distance between pannels and inverter is around >10m and the wires are 6 sq mm ...
14
votes
4answers
1k views

Motor fader PID control

I'm trying to control a motorized fader (linear slide potentiometer) using an Arduino. PID control gives good results for "jumping" to a specific target position, but tracking ramps is a problem, it's ...
1
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0answers
67 views

Control magnet through stainless steel wall

I'm a mechanical engineer enthusiastic about learning electrical engineering and I speak french so I thank you in advance for your comprehension and your help. I would like to be able to activate an ...
0
votes
1answer
69 views

Using Multiple MLX90614 Sensors on Arduino Board

I've been trying to get something working for a project, getting 4 (just trying to get at least 2 working for the moment) MLX90614 IR sensors connected up to an Arduino UNO board. I've followed the ...
1
vote
1answer
121 views

USB Device that acts like a printer [closed]

Our client uses some third party software and devices for their internal work. They print 600 pages per shift and now they wanted to eliminate paper usage without changing their existing systems. ...
0
votes
0answers
48 views

Sending Array data from Arduino Mega 2560 to Nextion and explode the data for required components

I am trying to make a device that shows Temperature sensors data and their graphical illustration at the same time. I have 4 texts (that show temperatures) and 4 gauges (that works as temperature ...
1
vote
0answers
48 views

AT commands not working while serial is working as expected for HM-10

I'm trying to use AT commands through the Arduino serial monitor, however, it seems like the HM-10 module just acts as if it is normal data being added to the custom characteristic value. I'm using ...
-1
votes
1answer
45 views

ATtiny45 program/reset issue

I'm pulling my hair out trying to get this ATtiny45 to work, hopefully someone out there can help. The ultimate goal is to drive an RGB LED strip using PWM, but I'm getting some unreliable behavior ...
0
votes
1answer
55 views

How do you add an onboard ISP for an ATTiny85?

I've taken a liking to building circuits around the ATTiny. Typically I add 6 headers and use an AVR programmer or an Arduino to program the ATTiny in circuit. I'm trying to figure out how move that ...
0
votes
0answers
59 views

External Temperature drop down MAX31855 when I turn on the heater

I am working on a Arduino project where I need to heat a sample to specific temperature. Arduino is powered with a power supply of 12V and 6A. The temperature is measured using a thermocouple ...
0
votes
2answers
139 views

How to switch a 12V DC (3A) Motor with a 3.3V signal? [closed]

I was previously using a 2N2222A transistor with a small dc motor and it worked fine. As soon as I used it to control the 3A motor, The circuit stopped working. Is there any way I could control the ...
0
votes
1answer
46 views

ESP8266 + TSL2561 I2C connection

My ESP8266-01 recognises the sensor TSL2561, but the readings always output 65535 for some weird reason. But as I said, when I run the I2C scanner and plug in the ...
1
vote
0answers
72 views

Producing clean power with multiple switch mode power supplies

Thanks, I am new to using this site, I apologize for my vague post earlier. Here is a schematic I been working on. The project requirements are 5VDC, and 20VDC. The 5VDC is to power the ...
-3
votes
2answers
88 views

SPI control STP16CP05 [closed]

I have this LED driver STP16CP05 https://www.st.com/resource/en/datasheet/stp16cp05.pdf I would want to PWM control 16 mosfets with the 16 outputs of the driver, is that possible or do I need a ...
1
vote
1answer
79 views

100W LED - Arduino controlled Driver

I have a project which requires me to drive a 100W LED (32V, 3A, CC). The only catch being, is that dimming control is required via Arduino. I couldn't find a conclusive method of doing this via ...
1
vote
3answers
131 views

USB hub inside modular keyboard for comunication

I'm working on a personal project which consists on a keyboard that also serves as a hub in order to connect more keyboards. For example, I could have the main keyboard with the letters and symbols ...
0
votes
2answers
59 views

Replace mechanical switch with electrical switch or relay

I have a remote controller for a portable heater, and I am working on a small project to be able to control the fan on/off from an arduino with Bluetooh HM-10 module. I thought a solenoid might work ...
1
vote
2answers
41 views

Something wrong with open USB circuit, electrostatic problem

I faced a strange problem with the following circuit. I'm using some buck converters and an Arduino. The buck converter (Vout = 5.25v) is for a USB charger (up to 2 Amps). Well, I think the circuit ...
0
votes
2answers
67 views

How to make the receiver send signal back to the transmitter with wireless RF 433MHz module

I want to buy a RF transmitter & receiver 433MHz on the internet for our research project which deals with radio frequency. I badly need the concept of having the receiver notify the transmitter ...
-1
votes
1answer
64 views

Comprehending wiring data sheet for ME3 C2H4 gas sensor

I am humbly requesting an English translation of this image. The only thing I figured out is that the box on the top left is the ME3 sensor I am trying to connect to an Arduino. It has three pins, as ...
0
votes
0answers
37 views

Secure Web Server

Case and Problem: I have an esp32 board and reading through arduino's site, I don't see any streamlined ways of setting up a secure web server. I did see ways to securely connect to a remote host but ...
1
vote
5answers
157 views

Using Relay Module

Can I use a relay module to switch on & off a door alarm (1.5 V × 3)? Basically, can a relay switch work in this low DC power? Also, I'm trying to make an alarm system which emits high noise when ...
0
votes
0answers
36 views

Connect 4-20mA output of the sensor to analog pin of Xbee module

i need to transfer my data using wireless communication, so have opted for Xbee ZigBee from digi international. The idea is to connect 4-20mA output of my sensor directly to the Xbee module's analog ...
1
vote
2answers
54 views

How to calculate Op Amp's gain using Arduino's ADC

Hi, I'm feeding a 500 Hz PWM signal to the Op Amp's V_IN using Arduino DUE. The Op Amp, which is ADA4000-2 from Analog device, is connected to +12V, -12V using an external power supply. The power ...
0
votes
2answers
198 views

Constant current led dimming

I have a few panel lights which come with normal non-dimmable constant current drivers. I want to add a dimming feature to them, please suggest me a circuit that I can use with Arduino/ESP8266 to ...
1
vote
1answer
50 views

Using an arduino to control whether or not a phone is charging or not

I am working on building a circuit that is controlled with an Arduino Pro Micro. It is being fed by a 3.7V 5000mAh battery which is also going to be used to charge the phone, but only when the Arduino ...
-1
votes
2answers
158 views

ATtiny85 can't be programmed [duplicate]

I've bought 2 ATtiny's from AliExpress and I can't program them. I've read some feedback and people say that they might be fake but then I saw some activity on IO pins. So I've made a small ...
0
votes
2answers
37 views

Powering an IR + RED laser with an Arduino

I am hoping to run a laser diode from an Arduino. The specific one with included data sheets are here: https://industrial.panasonic.com/kr/products/semiconductors/laser/red_infrared/red-and-infrared-...
1
vote
1answer
41 views

Use of blender's PSU

I would like to use blender PSU board. To power motor of the blender. Whole blender consists of this this board, control board (which blew up) and motor itself. I am now trying to hack this board to ...
0
votes
2answers
57 views

I have a 24vac input, and want to use a NO relay so an arduino knows when the relay is closed

I had thought I could just connect the 24vac input to a relay input, and then setup a pin as an input on the arduino and be able to know that the relay had closed. But now I'm reading that relays ...
0
votes
1answer
41 views

Getting out of a pattern in Arduino IDE - Ultrasonic + Motors Using Arduino

I am doing my final-year project of an autonomous river cleaning robot. I seem to have a problem with my code.. For now, i want to read my Ultrasonic Sensors (HCSR-04) while getting my DC motors to ...
-2
votes
1answer
42 views

Search very small ultrasound emitter\receiver [closed]

I am looking for a very small emitter/receiver ultrasound. Not to be confused with the distance meter. The device must be 2 in 1. Switch mode. Or should register a signal if it does not send. Only ...
0
votes
1answer
14 views

how to avoid harmonic on intrrupt for proximity sensor in NodeMcu

i have 5v IR proximity sensor for measuring pulse output attached in NodeMCu using intrrupt pin but it gets a random counter on the harmonic environment. it is working fine in Normal situation what ...
0
votes
1answer
30 views

Controlling output voltage using Arduino

I want to control the temperature of a heat pad, which heats up using a power and ground pin, and is controlled by a pressure sensor. The micro controller I am using runs onl 3.3V but the desired ...
1
vote
1answer
43 views

Battery charger/discharger using N mosfet only

I want to make a battery charger discharger with an arduino, to be able to plot graphs. And afaik N mosfets are better in terms of Ron and cheaper and easier to ...
1
vote
1answer
140 views

Advice for this P-Channel MOSFET Power Source Selector

I know there are already questions and answers about P-Channel MOSFETs and power source selection, but I still find myself pretty confused, as many of those are more complex than my circuit or simply ...
1
vote
1answer
77 views

Solid state relay (SSR40) behaves weird

I'm trying to connect a Solid state relay using Arduino Nano. I have a push button on the circuit when press, turn on a water pump (1.5hp). I was able to make the circuit and code for the push button ...
1
vote
2answers
94 views

SD card initialisation problem with Atmega32u4

I have had this issue for the last couple of days and I cannot solve it. There are many similar issues I've read through online but they have not really worked for me. This project involves a PCB and ...
0
votes
0answers
20 views

Optocoupler or transistor.. which is good for high load relays using Arduino

I'm a newbie or a beginner with electronic stuffs. I'm trying to switch on/off a 1.5hp water pump using Arduino. I've got a 40 amps solid state relay in which the coil voltage is 12-36v. So for that I'...
0
votes
1answer
43 views

How to interface a passive inductance sensor output (audio-level signal) with Arduino?

Would like to interface two passive magnetic-inductance sensors output (audio-level signal) with Arduino. The sensor circuit comprises of two wire-wound sensors and has no power. It generates it's ...
0
votes
3answers
75 views

Interpreting rating label of DC power supply - supposed to be a constant voltage source or a constant current source?

Link to product store page Hi all, bit of a beginner question here. According to the output section of the label, this is a 12V, 1000mA power supply. This is confusing me a bit. Is this device meant ...
0
votes
0answers
60 views

SPI problem with STM32F103

I am trying to connect blue pill board(master) to arduino nano(slave) over SPI and read what I have sent on serial monitor. However I haven't been able to get SPI working. I run a timer to generate an ...
0
votes
0answers
36 views

Op Amp Unity gain gives an unexpected constant saturated output

I have this following circuit; I use an Arduino DUE to send a 12-bit DAC output and I want to feed this in an Op Amp. Every ground is tied to the same ground. The Op Amp is ADA4000-2 from Analog ...
1
vote
1answer
33 views

Consistent Current Output From Batteries To DC Motors

I'm new to ECE and as a beginner project I've taken apart an RC car and attached an Arduino to the DC motors with an L298N module for control. The goal is for the car to drive a certain path with pre-...
1
vote
2answers
75 views

How to disable arduino Hardware Serial Rx Interrupt Properly

Intro: I have an Arduino mega doing multiple tasks , from which A function Reads data from a sensor using SPI . Every like 10,000 read or something , i get 1 error bit in the SPI data . and I have ...
0
votes
2answers
96 views

Power consumption NeoPixels vs. direct control?

At Maker Faire Berlin 2018, an electrical engineer looked at my project which was shown with NeoPixel LEDs (WS2811). He mentioned that the NeoPixels waste a lot of energy. It would be better to build ...
0
votes
2answers
66 views

How to send a digital signal when analog sensor (QRE1113) reaches a threshold value without resorting to wasting analog input pin?

I'm building a miniature pinball machine and I am attempting to use an infrared reflector sensor (QRE1113) to detect when the ball rolls over it (I got the original idea from Ben Heck's videos). In ...
-1
votes
1answer
77 views

Blink 3 LEDs at 1 Hz with a Power up ON Time Delay

I am very new to Arduino! I am struggling to create an Arduino program that would blink 3 LEDs with 1 Hz rate with an initial ON time delay for the 2nd and the 3rd LED. When the Arduino is switched ...