Questions tagged [arduino]

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When I run the simulation I receive errors. I am a beginner in proteus and I do not know how to solve this problem

#I:ISIS Release 8.11.00 (Build 30052) (C) Labcenter Electronics 1990- 2020. #1: Compiling design 'C:\Users\tonyo\OneDrive\Documents\CIRCUITO LUCES SECUENCIALES NE555.pdsprj'. &C=0002, 00000003 ...
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-3 votes
0 answers
44 views

Encryption for an antenna communication with an Arduino [closed]

How, and what possible algorithms, could I implement for the encryption of an antenna communication system, designed with an Arduino prototype, of 8bit packages. The algorithm has to be simple enough, ...
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1 vote
3 answers
117 views

Failing diodes and shorting NMOS and PMOS in H-bridge at 19A

I have been working on a H-bridge design that controls a 12V motor to rotate forwards or backwards at an adjustable speed using PWM from an Arduino. The motion starts slow and increases to max speed ...
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0 votes
0 answers
32 views

How much current is needed for a hall sensor to detect a HIGH signal?

I am trying to get a sensored bldc motor to spin by building my own ESC (electric speed controller). I have built a circuit that works perfectly the way I want it to using 3 H bridges, but the problem ...
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-1 votes
0 answers
18 views

LoRa setup not working properly [closed]

Hi guys I hope you can help me. I'm new to LoRa communication, just bought two RA-02 433MHz modules, these ones to be more exact: https://shop.m5stack.com/products/lora-module With them, I connected ...
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0 votes
0 answers
41 views

Identifying I2C to dual UART interface IC part number of DFRobot module

DFRobot has a nice I2C to dual UART adapter module DFR0627 and good Arduino library support. I am going to design a customized PCB with several hight speed UART based on Arduino + DFR0627 ...
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3 votes
0 answers
66 views

Review of electric circuit with Arduino

I am currently working on a project for which I am in charge of the electronic circuit. Since I have never worked with electronics before, I am really desperate and unsure whether what I am doing is ...
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0 votes
1 answer
83 views

How can I control a 5HP single phase motor with an Arduino UNO?

I am able to switch ON and OFF 1.5 HP single phase motor (current rating of 8A) using a relay with a rating of 10A, 250VAC (SRD-05VDC-SL-C.) What can be used to connect a 5HP single-phase motor (28A ...
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0 votes
2 answers
101 views

Do you understand this circuit?

I'm trying to reverse engineer this circuit so that I can use the buttons with a microcontroller. The problem is with buttons on the left. Counting from right to left, above on pin 7, I think that's ...
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4 votes
1 answer
105 views

Scan codes from PS/2 keyboard misbehaviors

In my quest to build my first CPU, I am trying to hook up a PS/2 keyboard to my FPGA. The keyboard is a Perixx PERIBOARD-409P. After a bit of reading, I hooked up the keyboard to a scope to verify its ...
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0 votes
0 answers
33 views

Isolated DC/DC converter to power ADC

I have a circuit with an ADC (Adafruit ADS1115) at the end to measure a voltage. I want to make this ADC into a DC island to avoid ground loops and noise, so I will use an isolated DC/DC converter to ...
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0 votes
1 answer
35 views

ESP32 S2 hanging but only when not connected to serial

I got a Lolin S2 mini development board, featuring an ESP32 S2. We're building a follow-me robot. The DC motors are controlled by this motorshield via I2C. The motorshield requires a modified library....
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0 votes
0 answers
24 views

Interfacing TFT LCD Module with Arduino

I recently found a 3.5in QVGA TFT LCD module (Stellaris LaunchPad LCD Boosterpack EB-LM4F120-L35) which is meant to be a booster pack for the EK-LM4F120XL development board by TI. It is supposed to ...
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0 votes
0 answers
36 views

Can I power an air pump motor with an L298N motor driver?

I am trying to control a mini pump motor. All the tutorials I have seen mention using a relay but I do not have one. I do, however, have an L298N motor driver. If I'm not mistaken, the pump motor ...
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0 votes
2 answers
52 views

Some Information Needed About Resistors [closed]

Complete noob here. I am learning kind of as i go, but that is irrelevant. I am wondering if and what the surefire way to find out when and where to use a resistor in a circut for example with arduino ...
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-2 votes
0 answers
27 views

How to measure change in TDS instead of absolute TDS through a TDS sensor?

I am using a total dissolved solids (TDS) sensor to measure TDS in an evolving solution system. The code below works fine to give the absolute TDS, but I would like to note the change in TDS over time....
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2 votes
1 answer
105 views

MOSFET being driven by an Arduino won't turn on without a 1M pulldown resistor

I'm driving an IRFZ44N MOSFET from an Arduino Uno (pin D2) via a 220R resistor. On the drain, I have an LED with a protection resistor to +12V, and the source straight to ground. The Arduino is ...
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0 votes
1 answer
64 views

Are these MOSFETs wired correctly?

I have an ESP32 that I'm trying to use to control a motor and a water-level sensor. Both of these devices are 12 V DC, so I'm using a DC-DC converter that takes 12 V input and outputs both 5 V and 12 ...
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-2 votes
0 answers
69 views

How to cancel external noise while using Arduino? [closed]

I'm using Arduino Uno to read values from the EMG sensor at the same time there is a 5 servo motor connected to Arduino, these servos are connected with DC 6V 2A power supply. The problem is whenever ...
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0 votes
0 answers
49 views

PS2 Controller to Bluetooth HID Gamepad

I'm planning to make a PS2 Controller Bluetooth Adapter similar to what EvanKale did in his Bluetooth PS2 Controller [Instructables][www.instructables.com/Bluetooth-PS2-Controller/] and Bluetooth PS2 ...
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1 vote
3 answers
87 views

Making a simple (but useful) oscilloscope using an Arduino Uno [closed]

I'm a first-year EE student who also has an interest in CS. In order to boost my knowledge in both fields I decided to make a project which requires the use of my skills in both fields. It came to my ...
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0 votes
1 answer
86 views

2-stroke engine interferes with Arduino project

I'm currently working on a bicycle project where I have mounted a 25cc 2-stroke (weedeater) engine at the rear of a bicycle. I have also created a speedometer (based on Arduino) which is mounted on ...
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2 votes
3 answers
174 views

Arduino Uno prescaler, not measuring what I expected

I'm using the following code to set a pin high or low (each cycle.) I measure that pin with a logic analyzer. I use an Arduino Uno with 16MHz frequency. I set a timer interrupt with a prescaler of 64, ...
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  • 206
1 vote
4 answers
96 views

How to make water flow sensor work to measure flowed water and not flow rate

I am using the YF-S201 water flow sensor. I am using this to fill up bottles. I need to know how to alter the below code in a way that instead of measuring flow rate it measures water passed through. <...
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  • 105
0 votes
0 answers
64 views

How to electronically sample speaker output

I have a device which, under normal conditions, is connected to a 16 Ohm 0.25W speaker via two terminal blocks. When the speaker is connected it enables the device to play a song or other tone when ...
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9 votes
3 answers
957 views

Why does a Pt100 RTD fail after immersion in thermally conductive and electrically isolating paste?

I currently have a Class A Pt100 RTD connected via an Adafruit RTD amplifier to an Arduino using SPI. It has good thermal contact with the warm surface after immersion in a thermally conductive (and ...
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  • 107
0 votes
1 answer
74 views

Capacitor keeps exploding on nixie HV power supply

I purchased the NK104B HV power supply from here to power some IN-4 nixie tubes. Whenever I turn it on, the 3.3 uF 200 V capacitor explodes. The first few times I used it (for a cumulative ~5 minutes ...
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-1 votes
0 answers
53 views

How to rectify an RF signal?

I have set up an antenna receiver that provides an AC 900MHz output. I want a DC signal at the output to feed it into an Arduino analog input for further processing. The problem is that using a full ...
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1 vote
1 answer
40 views

Arduino USB Protection

I am an absolute novice when it comes to electronics. I want to use a PC to control an Arduino UNO clone that will in turn control a strip of 122 neopixels. My fear is that I will somehow damage the ...
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-2 votes
3 answers
65 views

Relays or MOSFETs

I’m making a circuit with peltier modules, a relay H-bridge and an Arduino. The system takes input from user of desired temperature. There is a temperature sensor placed on the peltier and the system ...
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1 vote
3 answers
92 views

Suitable sensor for very faint vibrations in metal

What is a suitable sensor for detecting very faint vibrations on metal e.g. on a railroad where the train is miles away? Is this even feasible? Just a hobby project for experimentation. I thought ...
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-3 votes
1 answer
41 views

How can I change the output pin9 and pin10 into pin5 and pin6? [closed]

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-1 votes
2 answers
44 views

Can a K-type thermocouple measure both air and surface temperatures? [closed]

I want to use a K-type thermocouple to measure exhaust gas temperature and surrounding structure temperatures for my micro turbo jet engine. I read in the comments of How to use MAX6675 thermocouple k ...
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-1 votes
2 answers
52 views

Controlling a 12V solenoid lock with 3.3V - IRLZ44N

I would like to drive a solenoid lock from a 3.3 V MCU with a N-channel IRLZ44N MOSFET. Here are the specs and diagram: Solenoid Lock: 12 V – 2 A (K02-12V DC 2A Electric Magnetic) Below is the diagram ...
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  • 105
1 vote
1 answer
67 views

Is it possible for two MCUs to monitor the same analog voltage signal?

I was thinking about tying two separate microcontroller inputs together so that they would be on the same node and monitoring the same voltage signal. Both basically doing the same thing (analog to ...
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  • 197
6 votes
4 answers
872 views

How to remove noise in ADC voltage measurement?

I want to measure the open circuit voltage of a battery cell (differential reading, that is A0-A1). In order to do that, I am using an industrial PLC based in Arduino Mega and a cheap but accurate ADC ...
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6 votes
2 answers
2k views

What does a function mean that doesn't have "void", "int", etc in front of it mean?

I am following a programming build in Arduino and I came across this code here: ...
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  • 177
0 votes
0 answers
14 views

ESC Brushless Motor Lipo Battery

I have purchased DC 12V 83.3A 1000W Power Supply and it powers 4 brushless motors A2212 1400KV Brushless Motor. I have checked the Motors and they require 11.1 V and Load Current: 19.0A Power:210W. ...
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-1 votes
1 answer
63 views

Shift register does not output voltage [closed]

I am building a 8x8x8 LED cubic matrix based on an Arduino. My schematic and PCB design was based on the one posted by Tapendra Mandal on Youtube. When I finally connected everything and try to write ...
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1 vote
1 answer
62 views

Large inductances are not well measured

I am using the circuit below to measure inductances. It works together with Arduino. We introduce a 5V pulse for a few milliseconds and then resonate the LC tank at the resonant frequency. This ...
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1 vote
1 answer
40 views

Power supply switching off and on again after load drop

Context: I'm trying to automate my plants watering. For this, I'm using an arduino nano, 3 moisture sensor and 3 pumps. To separate the power (pumps) and the control (arduino output), I'm using S8050 ...
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1 vote
1 answer
76 views

Problem working with MIDI on hardware serial port on Raspberry Pi Pico 2040

I'm trying to make to make a simple MIDI communication with a Raspberry Pi Pico (2040) microcontroller (Arduino core/PlatformIO). I've successfully made it work using USB MIDI with this code (using ...
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  • 193
0 votes
0 answers
37 views

How to generate PWM with a PIC16F676 when a button when is pressed?

I am using MikroC to program a PIC16F676 in order to generate five different PWM signals. The output is only one which is pin number 10. I am new to PIC so I get confused between different compilers ...
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  • 15
0 votes
2 answers
58 views

How does the Arduino 5VDC relay module work? Using SRD-05VDC-SL-C

I was wondering how this 5V relay module works exactly. I understand how the actual relay circuit (SRD-05VDC-SL-C) works but I'm not totally sure how the signal and 5V inputs work. My guess would be ...
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0 votes
0 answers
72 views

Controlling BLDC motor with Arduino UNO

I've been working on a project for controlling a BLDC motor using Arduino to send control signals to an ESC, which then will control the motor speed. I'm doing this so that I can test the thrust and ...
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0 votes
1 answer
46 views

Using Arduino LED instead of LiPo charger (TP4056) CHRG + STDBY LEDs

I want to remove the LEDs (RED+GRN) on the charger PCB and indicate if the battery is charging on the Arduino 33 BLE Sense board instead. Arduino has a bad habit of reporting random numbers on the ...
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  • 3
0 votes
2 answers
142 views

Detect how many push buttons are being pressed using a maximum of two Arduino pins

Imagine you have a varying number of push buttons that you need to connect to a microcontroller such as Arduino, of which you can only use a maximum of two pins (not counting 5v and gnd). Each button ...
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  • 1
0 votes
1 answer
35 views

How to connect Arduino to AC motor

I want to connect from Arduino Uno to AC 1.5 kW single phase motor for my cement mixer project. I was want to try to create a switch on off by using code in Arduino and I was thinking to add several ...
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2 votes
1 answer
42 views

Why does my phone's RFID UID change each time I scan it on a RFID scanning system?

I am currently playing around with RFID on my Arduino UNO using RC522 module. I have followed a code tutorial from this website https://arduinogetstarted.com/tutorials/arduino-rfid-nfc and am able to ...
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0 votes
0 answers
35 views

Improve accuracy of thermistor circuit

I am using this thermistor to measure temperatures between room temp and 100C and I want to design the circuit in such a way that it reads as accurately as possible (ideally +/- 2 degrees). I'm using ...
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