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Questions tagged [arduino]

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25 views

Use microprocessor with arduino

I was looking through some of the atmel microprocessors, and I was wondering if you could use a microprocessor (say, the atsam91) as a coprocessor for a microcontroller, so if the microcontroller ...
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3answers
327 views

If a module is “arduino compatible”, does that necessarily mean it isn't compatible with other microcontrollers?

I'm trying to find a GSM module to pair with a PIC32 microcontroller for a project and I've found some nice ones. The one I'm really interested in is the SIM800C GSM module. Many of them say they are "...
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4answers
74 views

Wiring a 28 segment LED bargraph (to an Arduino)

I need to control a Barmeter 28 led bargraph via an arduino (Mega). I believe I have found the details of the component here: http://www.barmeter.com/download/bl28-3005sk04y.pdf (BL28-3005SK04Y) I ...
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25 views

Motor Driver for gimbal brushless motor? [on hold]

i want to make a 3-axis gimbal but dont know what motor driver or esc to use for slow speeds and have it be able to connect to an arduino?
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23 views

Can I use AC voltage from myRIO to power stepper motor?

I am using easydriver and arduino for a stepper motor provided on this website The motor is 17HS3401S Stepper Motor and I think this is the correct datasheet found on the internet for the same. ...
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1answer
39 views

How to ignore an undesired short output signal coming from arduino?

I'm currently programming a Nodemcu ESP8266 board, fully compatible with Arduino IDE. The project drive a relay board with a GPIO pin set as output. You can see the board pinout in the following ...
2
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3answers
79 views

Driving two MOSFETs with one AND Gate?

I am designing a circuit to drive the brakes on a DC motor. The brakes are a 19.9Ω coil that is disabled when energized (think wheelchair motor style brakes). The brakes work on 24VDC. I have found ...
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1answer
40 views

Trouble controlling LED strips with n-mosfets on 2 power supplies

I have 2 equal power supplies and I try to control LED strips using arduino and n-channel mosfets. I've split the strips between the supplies, strip A + arduino is on one power supply, strip B is on ...
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1answer
60 views

Best sensor to measure light intensity in open room

I am working on a project to understand how robot localization is effected by light levels. I am wanting to build a circuit which can be mounted on a small robot near the camera and can determine lux ...
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0answers
15 views

Compiling error for board chipKIT MAX32 in Arduino IDE [migrated]

I have a compiling error for chipKIT board MAX32, which looks like this: exec: "/bin/pic32-g++": file does not exist; Error compiling for board chipKIT MAX32. As I checked this file in Arduino/...
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1answer
26 views

FIFO Clock Setup for CMOS Detector

When attempting to construct a miniature laser beam profiler with the Omnivision OV7740 CMOS detector and an Arduino Due, I am running into some problems with FIFO reading/writing. From the datasheet, ...
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1answer
34 views

pull-up resistor relay (low trigger)

I'm having issues controlling a single relay module with an arduino. It works fine when its up and running but the relay initially starts triggered until the arduino can send a "high" signal to turn ...
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35 views

Old Arcade Game Controller Board [closed]

I am restoring a Sealy arcade game to work with the MAME emulator, long story short, bought the cabinet with the hard drive removed from a windows computer. The board I'm attempting to work with ...
2
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1answer
57 views

Measuring small currents at DC high voltages without floating meter

I'm doing a project with a Cockcroft-Walton multiplier that will output up to 40 kV DC at up to 10 mA. The the circuit takes an input of 10 kV AC at 60 mA and 60 Hz (from a neon sign transformer) and ...
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1answer
35 views

Arduino to PC multi-sensor device

This us for a liquid-cooled computer or server. Is it at all possible to ”daisy-chain” (possibly not the right term) multiple Arduino boards together for the following inputs? Multiple different ...
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3answers
57 views

Extending the NRF24 range / power

I have a NRF24L01 model with an included screw-on antenna and apparently also an integrated RF amplifier (something like this, image sourced from eBay seller top_electronic1980). I have a lot of ...
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2answers
188 views

How to turn a coffee machine on/off with a microcontroller? [on hold]

So the thing is, I'm a computer science major and working on an IoT project which is a coffee machine powered by a Particle Photon and controlled with an Amazon Alexa skill. The problem is I have ...
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0answers
71 views

Voltage drop on load

I have designed a circuit to keep the heating element at a constant temperature. The digital part of the circuit is being feed from a 5V LDO which is powered by two 18650 batteries in series and the ...
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1answer
40 views

A circuit with a non-inverting op-amp and comparator for amplifying the output of a piezo transducer. Am I missing anything?

I'm a total noob when it comes to electronics so was hoping some people might be able to take a look at my circuit and see if it makes sense. I'm trying to create a circuit which amplifies the puny ...
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0answers
29 views

Switching 5v with Arduino

I need to control the state of an El Wire light tube with a USB power supply connector with an Arduino Nano or Uno. I want to avoid relays because of the loud click sound. As I'm pretty bad at reading ...
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0answers
24 views

Touch sensitive surface above leds

So I'm currently working on a box which should dim my lights based on a touch surface on top of the box. To indicate the light brightness I want to place a ws2812b ledstrip under a layer of white ...
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2answers
25 views

Modbus RTU using SoftwareSerial

Im trying to control a temperature controller using Arduino MEGA over SoftwareSerial. Im using Modbus-Master-Slave-for-Arduino library and I tried to test using example code below. It gives only <...
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0answers
48 views

Alternatives to common collector transistor switch?

I am trying to connect a Raspberry Pi / Arduino to a coffee machine. The coffee machine has a simple function, with a single button (momentary switch, on a DC cicuit) to dispense a coffee. I'm trying ...
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0answers
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 ...
4
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4answers
363 views

Limiting sensor input voltage without biasing measurement

I need to measure precise voltage in the range from 0.375 volt to 10.1 volts from a source with 100ohm impedance. Maximum voltage however, may be well above 10.1V, so I need to be sure I do not ...
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1answer
104 views

Very confused regarding parallel resistors limiting current

I'm an electronics noob trying to understand this Arduino circuit below. Having very cursory knowledge of electronics, I'm extremely confused by this statement I took from the Arduino Knock example: ...
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0answers
22 views

Arduino GSM shield to GRPS provider

Can anyone explain how to turn Arduino GSM shield into GPRS provider for other devices like smartphones so these can connect to Arduino GSM shield and use internet from it? Thanks!
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2answers
43 views

Choosing a current sensor based on mV per amp

I want to measure AC current with an Arduino-type device. I am currently selecting a current sensor. A 10 bit ADC gives 1023 points. At 5v that is 5v/1023 = 4.9mV A current sensor with 185mV/A thus ...
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2answers
97 views

is it possible to control 8 motors with 74hc4051?

I need to control 8 motors from Arduino. speed control only with a single pwm output I use a single channel at time I have 74hc4051 analog/digital mux/demux ic if I set mosfet drive circuit ...
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0answers
27 views

Replace half-duplex electrical connection with light?

The digital pins of two Arduinos are connected for half duplex communication: Now I want to connect the electrical connection with optical communication through a light pipe: Drafts for separate ...
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2answers
42 views

Can I keep half of an addressable led strip on?

If I bought some WS2811B led strips (300). if I ran them across a room is it possible to make the first 150 LEDs or so stay on, and the last 150 off?
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49 views

How to increase range of LoRa

I'm pretty new to wireless communication and Lora. I've read in many places that with Lora in urban areas "you can expect up to 2- to 3-km-wide coverage, while in the rural areas it can reach beyond ...
1
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2answers
91 views

Why these tutorials don't care about wires when using 10A with 5V to light up strip LEDS?

One popular project I want to do with my Arduino is to light up 150 LED Strip of 5 meters (WS2812B). Here is my project: So, I have a power supply of 5V 10A (ALITOVE 5V 10A AC to DC Power Supply). ...
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0answers
38 views

Rx Buffer overflow in MCP2515 CAN controller

Here is my context: I connect to automobile drivetrain CAN bus (Volkswagen Passat) and sniffer all the traffic. The problem is that when MCP2515 got a message from CAN and I read it via SPI, the ...
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0answers
48 views

Powerbank doesn't supply LED strip

I have the following setup: rougly 15m of WS2812-LED strips divided into two segments Both segments are connected with Data and GND. On one side the LEDs (LEFT SIDE) are also attached to an arduino ...
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0answers
41 views

Isolating grounded resistance? Glow plug thru MOSFET

Have an Arduino triggering an LED array AND a MOSFET that burns a glow plug for 1 second, from the same power supply (3.7V 720mAh Lipo). The issue is that when the mosfet is triggered, it seems to ...
0
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1answer
54 views

Innitially turn off device with relay, Arduino and IR remote

I am suing this code to control relays with Arduino and remote. This code is working fine for my requirements. Only problem is that when electricity goes and come after some time all appliance turned ...
0
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1answer
89 views

Arduino Mega2560 as power source of 2W

I have a sensor which requires 24V supply voltage and 2W power consumption. So, my plan is to use Arduino Mega2560 for power source of this sensor. First of all, I would take MT3608 DCDC converter to ...
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0answers
23 views

Controlling Relays with Arduino and External PSU

I'm on a project in which a number of 5V relays are used. Since I have an LCD connected directly on top of my Mega2560 (via LCD TFT Shield) and it draws significant current from the built-in 5V ...
0
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1answer
22 views

TUHS3F05 without other components

I'm planning to use TUHS3F05 for my ESP32 project. I'm very space limited so I need to optimize place as much as possible. In datasheet it is recommended that TUHS* it should be used with other ...
1
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1answer
41 views

HX711 adc read functions gives different accuracy

I'm reading data from HX711 with stm32F1 but accuracy of the data are awful. when i read data with arduino the data ten times good if we compare with stm32 results. these are my read functions. ...
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0answers
82 views

Easiest way to short 50 pairs of wires together

I have a serial keyboard that has 24 pins and works via one of the top 11 pins shorting to one of the bottom 13 pins when you press a button (top and bottom membranes touch) and this is picked up by ...
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0answers
51 views

Ultra low power but also wake on event?

I have a nodemcu that needs to turn on periodically (every 2 hours) to take measurements, send them to me and then go back to sleep. I need this to be able to last for at least a year on batteries, ...
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2answers
75 views

Looking for a way to re-program 16x2 LCD display EEPROM font

Some time ago I've seen this topic - asking where does the fonts stored in 16x2 (1602) LCD display. Does a 16x2 LCD display has its own EEPROM? I'm really interested in this, and didn't find any ...
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3answers
177 views

Arduino Pro Micro Frying Up

I made a PCB with two Arduino Pro Micro 5V on it as a control system for a machine. The PCB is powered by a 24VDC PSU and a part of that 24 VDC goes to a R-78C12-1.0 DC-DC converter. That gives 12VDC ...
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1answer
73 views

What type of sensor to detect if an object passes through?

(Sorry for my bad English) Hello guys, I need your help since I have no idea about electronic stuff. I have a table soccer and want to install motion sensors in the goals, so whenever the ball ...
0
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0answers
23 views

issues with serial printing with broken stlink using arduino ide for nucleo f411re

I am using stm32 nucleo f411re for a project. I have separated the stlink from the board, and I am using arduino ide extension in vscode to program the nucleo f411re. The issue is I am not receiving ...
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1answer
80 views

Can I turn on an LED, only if the switch has been closed for a desired amount of time?

I'm trying to use a ball switch and an Arduino to turn on an LED. I only want the LED to turn on if the ball switch is closed for 20 seconds. Does anyone know how to do this? Thanks.
0
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1answer
69 views

Arduino lack of accuracy in AD conversion

let's consider this simple piece of code: ...
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0answers
51 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. ...