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Questions tagged [arduino-uno]

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20 views

Are there any alternatives to Tinkercad Circuits that is PC application based instead of web app based? [migrated]

I have been using Tinkercad's Circuits web application to create my Arduino circuits and apply my Arduino code (c++) for testing. Despite the amazing product they have and the fact it's free, I find ...
0
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1answer
60 views

Why does my IR receiver spit out random codes when my motor is on?

I'm learning electronics and trying to understand why my IR receiver spits out random codes when my motor is on. I have a basic setup with this: Arduino Power supply set to 5V IR sensor receiver ...
0
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1answer
68 views

Arduino lack of accuracy in AD conversion

let's consider this simple piece of code: ...
0
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0answers
50 views

Modulate/demodulate 125khz signal to 433Mhz transmitter module (2.5Ghz carrier)

I am trying to implement a project which consists of two circuits. Circuit A receives a 125khz AM signal and modulates it to 433Mhz CC1101 which then uses 2.4Ghz carrier to send at longer distance. ...
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2answers
76 views

Clarification on adding capacitors in parallel

I have a 5 metre strand of WS2812B LEDs, at 18W per metre. I also have a 120V to 5V-30A power supply I plan to connect them to. The data pin will be connected to (for now), a PWM pin on an Arduino ...
1
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1answer
50 views

Arduino AREF pin

In Arduino UNO R3 official schematic the AREF pin is not connected to anything: While in most online Arduino schematics (such as this one) it's connected to a 100nf capacitor and then to the ground, ...
0
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2answers
80 views

Arduino - Not outputting 2 separate signals

I’m trying to get an Arduino to output 2 signals with different frequencies for a project.The schematic of the circuit is shown below. I’m trying to experiment using Pulse Width Modulation to give me ...
0
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0answers
73 views

Arduino UNO, L298N Stepper Motor Drive Waveforms

I am driving an unknown stepper motor using a little red L298N board from eBay. The board is sometimes called Qunqi L298N Motor Drive Board Module. I used a 19.5V laptop power supply to power the ...
0
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1answer
65 views

WRL-1368 (ESP8266) wifi module briefly flashes blue LED once when powered up, then nothing happens

I bought a WRL-13678 wifi module, but when I connect it to a 3.3V power source, the blue LED flashes once, then nothing happens. I tried powering it from a 3.3V breadboard power supply (connected to ...
-2
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2answers
120 views

Can I control 6-7 devices of 12v max (each) with Arduino Uno?

I have to control following devices: 2 × Gear motors (each 12V, 200mA, speed & direction) 1 × Motor (12V , 1.2 A, on / off) 1 × Motor (3V, 110mA, on / off) 1 × dc pump (...
0
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1answer
66 views

Why my circuit only draws max. of 2.8V across the electromagnet? (Circuit picture included)

I created a circuit using Arduino Uno and the goal is to use pulse width modulation (PWM) so the voltage across the electromagnet decreases from maximum value to zero, and then the cycle repeats. The ...
1
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1answer
73 views

12 V Solenoid Valve Not Opening

I am a chemical engineering student. I need to control a valve and pump system using an Arduino Uno. I was testing out my 12V DC solenoid valve with a variable DC power supply, and noticed that the ...
0
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0answers
33 views

What configuration is needed to use an ATMega328p micro-controller on a breadboard

I previously bought an Arduino Uno that came with a store bought/prebuilt PCB and ATMega328p to program it and use the pins. I also have a second ATMega328p that was bought by itself and I ...
0
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3answers
83 views

Connecting Arduino to 10hp 3 phase ac motor?

I want to connect Arduino to 3 phase 10 hp ac motor. I just want basic functionality that is I should be able to turn it on or off using the code. Is it possible to do with 3 phase solid state relay? ...
0
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0answers
160 views

TMC2130 with Arduino UNO

I have the Bigtreetech tmc2130 and trying to get it running with an arduino UNO. I have tried using the driver in my 3d printer and it works in SPI mode. I have tested the stepper motor driver with ...
0
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1answer
42 views

Different level TTL driving each other? A problem?

I connected a GPIO of a 3.3V level board (schematic, pin is 5V tolerant) as output to a 5V Atmega328p (schematic) pin configured as INPUT_PULLUP. I perform a low active control function with that. ...
1
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2answers
108 views

Buck converter for Li-Ion 2s battery charger

I'm currently doing a project that requires the charging of a 2s Li-Ion battery. I have an 18V 10W solar panel that I want to charge my battery using a buck converter. Im controlling the switch and ...
1
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1answer
192 views

12v DC brushless PWM fan burnt out via Arduino Uno

I’m working on a project where I want to control the speed of a fan using a microprocessor. I read several posts about using an Arduino Uno to control the PWM function on a 4 pin fan you find in PCs, ...
6
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4answers
2k views

Can a USB port passively 'listen only'?

I have a small dedicated controller built around an Arduino that accepts commands from a PC over USB (serial). The communication is one-way -- the controller never sends data back to the PC. Now I ...
0
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3answers
73 views

Arduino Uno reading a logic 0 signal as 1

I have a program on my Arduino Uno that needs to execute quickly, so I'm trying to carry it out by dealing directly with registers. I made a few recent changes to my code, which was originally working ...
0
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1answer
20 views

Running MG996R servo using Eneloop Pros

Recently I just bought 2 pack of Eneloop pros, and have fully charged it. By using a multimeter I saw that the voltage went up to 1.3 ish after it is fully charged. And I'm planning on using 5 of them ...
0
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1answer
72 views

Don't know which transistor I should use

I am new to transistors. I want to know which transistor I should use which will suffice for my H bridge. My motor draws 1.2A at 6V when stalled.
0
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1answer
55 views

Servo arduino using eneloop

Say if i use 5x eneloop AA batteries to run 6x MG996R servo, will it be good enough since im afraid for the motor if it will burn out. I already read the spec sheet what im afraid is the stall current
0
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1answer
101 views

How can I use PWM to power a 1.5v dc motor with an 5v board Arduino UNO?

I tried to calculate the value for analogwrite which is 77 but that doesn't work. I also tried a bunch of other value but none of them spin the motor. Is this possible and am I missing something? the ...
0
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0answers
30 views

How to stabilize the magnetic levitation system? [duplicate]

I have asked similar question before also but want to try again - Not able to levitate magnet for magnetic levitation project I followed everything from this project but still, the magnet is not ...
0
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1answer
78 views

Using laser engraving for date stamping [closed]

This is my very first big project. I have to build a laser engraving machine for date stamping. I'm using Arduino Uno microcontroller and a CNC shield with GRBL control. Being fairly new to G-code, I ...
0
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0answers
39 views

Circuit B will turned Off for 2secnd and than turned ON

Am really a noob in this regards, therefore, need help to build an easy 12 V circuit which when circuit "A" is powered off enables "B" circuit to switch off for 2 - 3 seconds and then turns on. I ...
0
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2answers
170 views

L293D DC motor affecting LCD display

In the circuit below, I have noticed that when the DC motor (12V) is disconnected, everything works nice. The LCD correctly displays what arduino sends to it. But ...
1
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2answers
58 views

How to choose proper power supply for 8 servos on Adafruit shield with Arduino Uno controller

I use Adruino Uno micro-controller powered with USB 5V from PC and Adafruit 16-Channel 12-bit PWM/Servo Shield on it with 1000uF capacitor, powered with 6V 2A power supply. Seems like it is not ...
0
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0answers
62 views

Automatic bird feeder with battery using servo

I am considering to create an simple automatic bird feeder with a servo motor and a plastic bottle, like this project, but without remote controller. The thing is that I would like to power it not ...
0
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1answer
60 views

Arduino Voltage Divider Connection

Can anyone explain the connection of the voltage divider in this image, why it's connected to A0? I put a red circle on the section that i don't understand.
-1
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1answer
165 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 ...
2
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1answer
359 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 ...
0
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1answer
66 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?
1
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1answer
134 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 ...
0
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0answers
76 views

ESP8266 WiFi relay module constantly switching on/off the moment power adapter is connected

Totally new to this. Tried googling and watching some youtube videos but can't seem to find anything that can related to my case. Do let me know if I'm doing something wrong. I bought my module from ...
0
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0answers
171 views

Update Mega328 Transistor Tester with Arduino Uno micro controller

I'm trying to update Mega328 Transistor Tester with Arduino Uno micro controller. Here is my Uno and Mega328 connection and Avrdude setting, including particular error: avrdude.exe: verification ...
0
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2answers
65 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
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1answer
43 views

Can I charge a large capacitor with a small resistor?

I am working on a simple Arduino capacitance meter. This project uses twp resistors: a 10 kohms resistor for charging and 220 ohms resistor for discharging. The Arduino is programmed to measure the ...
-3
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1answer
94 views

What if I connected +5V from one source and GND from other to arduino [closed]

I'm just asking... What if I connected +5V from one source and GND from other to Arduino Will it work? EDIT simulate this circuit – Schematic created using CircuitLab Will it work? or ...
0
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2answers
240 views

Use a switch to override Arduino program

I am building a system where I am controlling 2 LED strips using an Arduino Uno, time chip and relay. I have managed to get the lights to turn on and off on 2 separate days at different times. Now I ...
0
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2answers
656 views

Connect RS422 interface with Arduino Uno

I have a fishfinder,Lowrance Carbon HSD 7, and I want to connect it with the Arduino Uno to let the fishfinder transmit the Sonar data and GPS data via NMEA0183. According to the maker's site, the ...
1
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1answer
65 views

Stepper Motor Voltage

I am having a problem making a stepper motor run. The problem is that the voltages that I am reading from the motor never reach zero (they move from a high voltage to a smaller voltage) so they never ...
2
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0answers
56 views

Trying to replicate the behavior of an smartcard without sucess. What I am doing wrong?

Background: I am a software engineer and I am starting to research security hardware in my free time. The one I am starting with are contact smartcards, which are defined by the ISO 7816 standard. I ...
1
vote
2answers
56 views

Powering a project from a car cigarette outlet

In my car boot there is a cigarette style power socket, I have a one of these: https://www.amazon.co.uk/gp/product/B077D71HXY/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 I also have an Arduino ...
0
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1answer
1k views

Interfacing of Proximity Sensor with Arduino [closed]

I want to interface OMRON Proximity Sensor E2A-M12KN08-WP-C1 2M with Arduino Uno. How do I interface it with the Arduino? Also, where will I find the relevant starter code? I am new to this and I ...
0
votes
1answer
85 views

Help understanding this schematic : Why is the diode there (AT89C2051 Programmer)?

I am having trouble understanding the following portion of schematic from AT89C2051 programmer circuit. Please help me comprehend what is going on here. Here is what I understand: A1 directly ...
1
vote
1answer
193 views

ESP8266 module emits random/garbage characters on external supply (but works on arduino's 5v & 3.3v)

Summary: With arduino's 5v & 3.3v supply , ESP8266 module emits boot messages and responds to AT commands on serial terminal@115200 baud as - boot message: ...
3
votes
1answer
198 views

How To Reassign The MISO Pin?

So I have a PCB with an LCD hooked up along with a 595 shift register. Unfortunately, when I designed the board I didn't realize that the LCD library used SPI, which on the Arduino Uno is pins 13-10. ...
0
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1answer
217 views

SPI read error with MCP2515

In an attempt to interface a motor controller, battery management system and maximum power point tracking device on a CAN bus, I used the MCP2515 and TJA1050 CAN breakout board. All these devices send ...