Questions tagged [arduino]

For questions about the do-it-yourself single-board PC and its add-ons.

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I2C/SPI USB host ic

I am searching for a USB host chip for connecting a keyboard to an Arduino. For this project, because most if not all i/o pins will be used (maybe 3-4 left), I want the chip to be able to communicate ...
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22 views

Small Form Factor Thermal Camera

I am Currently Looking for a Thermal Camera which either has an lcd screen which can be be extended away from the camera or simply a high quality thermal camera which can be programed into an lcd. ...
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8 views

Send with Serial port and Receive with SPI in Arduino

I have two Arduino and connect them with CANBus. For CANBus, i used two MCP2515 modules. Connection was successfully and data send an receive. I have a question about TJA1050 module; I want use ...
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7 views

NFC Reader for Java Card except PN532

I want a reader that can communicate with Java Card through APDU. I know PN532 can do this but its prices of are increasing day by day as it becomes obsolete. I was thinking of RC522 but I am not sure ...
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12 views

Recommendation: Do I need a JTAG debugger and microcontroller programmer, which one?

I'm a microcontroller newbie. I need a recommendation. I wanted to get into microcontrollers and what better way to do it then an AVR or ARM microcontroller board. Eventually, I hope to be able to ...
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11 views

Arduino Presence Detector through Glass and Transparent Objects

I'm trying to measure the distance of a glass/transparent object using an IR sensor. Does anybody know of sensors that work for this task? Note: it has to be reasonably small, so ultrasonic sensors ...
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14 views

Arduino Solar GPS tracker

I am looking to create a solar powered GPS tracker for a fleet of rental trailers. I am intermediate Arduino user and comfortable with this platform and would like to base it on this system. ...
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7 views

Small speaker and display for microcontroller

I am looking to make a small video display (with or without sound) in the back of an A5 notebook, using a microcontroller. I am looking for a total below 40USD, so preferably it can be found on ...
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8 views

More powerful ESP9266 based microcontroller than nodemcu

I am currently working with Nodemcu. I am running a very long code with many HTTP requests. After 3 http requests, the nodemcu gets crashed. It is unable to handle. I am looking for a WiFi ...
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3 views

Rubber keypads and servo & LCD on Arduino Mega2560

I'm quite a newbie to Arduino and hardware & circuit board stuff, so please forgive me if you feel my questions are too stupid. Recently, I'm working on an assignment which I have to reconstruct a ...
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7 views

Programmable RFID card

I'm new to RFID technology and cryptography. So, I'm trying to apply light weight cryptography in RFID tags as a part of my project. I'm already able to read and write information in some passive ...
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6 views

Recomendation required for complementary (N+P) MOSFET H-Bridge

I need an integrated IC of MOSFET Bridge for DC Motor (Half Bridge with high side P-Type and low side N-Channel MOSFETS). Current requirement is high. kindly suggest a module with advanced features.
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22 views

Sending order from ESP32 to Arduino Mega [closed]

I am new here and this my question regarding my graduation project. I want to control the Arduino board from ESP32. For example, a temperature sensor will be connected to the ESP32, when ESP32 read a ...
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12 views

UV distance measurement sensors

Is UV is used for distance measurement as IR,Sonar,Radar etc? If so is these sensors available in the market? What I need is a distance measurement sensor which penetrates through water and air both ...
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7 views

Which device can measure distances remotely over a range of about 25m?

Currently, I am searching for a device that I can be set up on a car to know the difference between a car or a huge obstacle next to it. I know one such device, i.e. TF02 LiDAR. But, the problem with ...
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25 views

Making a WiFi event recorder

I want to make a stomp box with a single button that will record an event time. I’d like the box to be able to record the event directly to a web database (there are plenty of ways to do this, but I’...
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24 views

Arduino Leonardo or ESP32 or ESP8266

I want to create a device simulating a wireless keyboards but I'm not sure which platform to use. Arduino Leonardo can simulate a keyboard functionality but has no embedded WiFi or Bluetooth module. ...
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15 views

LED-matrix boards with matrix circuit

I am looking for LED-matrix board that have an matrix interface instead of the shift-register interface that you find everywhere. So something like this: https://www.circuitspecialists.com/blog/build-...
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7 views

AI based camera to monitor entering/exiting people

I am making a AI based camera device to monitor entering/exiting people at houses front door. I am looking for a hardware to accommodate following things: Low power consumption (to maximize low ...
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14 views

What sensor could i use?

For a school project I need to build an interactive climbing wall, I have an app where I can choose a trail that lights up, I have already figured out how I'm gonna light them up but I'm still ...
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37 views

Best low cost microcomputer for running Unity app + webcam

I have an art installation I want to build that uses software written in Unity, implementing opencv and using a webcam, and displaying on some sort of inexpensive monitor. I can compile to Android/iOS/...
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1answer
20 views

incremental encoder with added joystick functionality

I was searching the web for days now and just couldn't find what I am looking for. I want to make a remote control for an adressable RGB LED strip using a single knob. It will be controlled by an ...
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1answer
25 views

Programmable Induction Hotplate

I'm looking for an induction hotplate that I can control via my own software. An RS232 port or something similar would be fine, but I don't mind if it's not RS232. As long as I can write a program ...
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1answer
10 views

Portable camera with bluetooth or some other wireless technology support

I want to find a tiny camera or camera module that can stream its videos via Bluetooth or other wireless technology. I want to use that camera as an accessory that can be attached to a body part. The ...
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35 views

Which ESP32 board should I use?

I have robot. The brain is an arduino mega with this shield. Pictures are below. Right now I am at the pont where I want to replace the arduino with an esp32. Which esp32 board do you recommend? ...
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23 views

Small device with Bluetooth low energy (BLE)

I need an small device with bluetooth that has to do the following: Have an accelerometer attached and read his data. After x seconds, send the accelerometer data to the paired device over bluetooth. ...
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Budget Microcontroller for large WS2812B strand

I am using an Arduino Uno R3 to control my Christmas lights (a strand of 665 WS2812B LEDs).The Arduino, while driving the LEDs, is not accessible from my PC, so I am attempting to use a Raspberry Pi 3 ...
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9 views

Arduino compatible Bluetooth Cat. 1 module

I'm looking to add a Bluetooth module to an Arduino project that I'm working on that will take outdoor temperature measurements. I plan to have several measurement stations over distances of several ...
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1answer
47 views

Mechanism to close a small gate using Arduino

I have a 3' (1 meter) tall plastic gate around my yard. I would like to automatically close it with my Arduino or Raspberry Pi. Not by remote control - I just want it to detect that the gate is open, ...
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214 views

Electronic Deadbolt for Door

I am not sure "deadbolt" is the correct term for what I am looking for. I am searching for the metal piece on the side of doors that extends to lock it, but one that can be controlled electronically (...
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2answers
60 views

Confuse-a-cat : seeking dirt cheap, wheeled, programmable robot

I was playing the old "confuse the cat with a flash-light" game, when I thought that I might like to program a confuse-a-cat robot. Something, probably with tracks, which can right itself if he flips ...
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36 views

What's an accurate and affordable indoor positioning system

TL;DR version I'd like hardware capable of doing these things Triangulate positions of nodes Be accurate down to 1-6 inches Able to see through fairly thin objects, like people/trees Fairly ...
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178 views

Cheapest single computer board with Wi-Fi and audio

I want to build a home-made multi-room home sound system. I'm looking for a single board computer device with a minimal hardware configuration. In my thoughts, my only requirements are: Wi-Fi ...
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1answer
356 views

Hardware components for MESH network with Arduino

I am in the search for some recommendation on a good hardware component for building a mesh network with Arduino I am not experienced in building a mesh network. So all recommendations and guidance ...
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255 views

VPS vs Raspberry Pi and Arduino

I want to implement this project... In the image I have: One and unique analog signal One analog to digital converter The output is carry out to several modules (executing FIR and rewriting the its ...
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1answer
57 views

What are good LED boards for an Arduino?

What are some good charlieplexing LED matrix boards for the Arduino that use very few pins? About 3 digital pins would be great. Also, I am looking for a good interface to control the LED matrix.