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| # | Post Title | Result Info | Date | User | Forum |
| Answer to: What are interrupts in Arduino, and how are they used? | 1 Relevance | 12 months ago | Admin | Arduino | |
| ... to bake a cake. Your loop() function is carefully measuring flour, mixing ingredients, and so on. Now, what if the doorbell rings? Without interrupts (the loop() WAy): You'd have to finish a major step in your recipe (like mixing the batter) and then quickly run to the door to check if anyone is there. If your recipe step takes a long time, your visitor might get impatient and leave. This is called polling – repeatedly checking the state of something. With interrupts: The moment the doorbell rings, you'd immediately pause what you're doing (even if you're ... | |||||
| How to interface a temperature sensor with an ESP32? | 1 Relevance | 1 year ago | Electronix | ESP32 | |
| Hi everyone, I'm working on my college Project titled "Temperature Monitoring System using ESP32", where I'm using a DHT11 sensor to measure temperature and humidity. I connected the sensor to my ESP32 board as follows: 1. VCC to 3.3V 2. GND to GND 2. DATA to GPIO4 I installed the Adafruit DHT library, uploaded the example sketch, and opened the Serial Monitor. But instead of getting temperature readings, it keeps printing Failed to read from DHT sensor! And sometimes it shows 0.00 °C, which is wrong. I tried the following, but still couldn’t get consistent results: 1. Double-checked wiring 2. Used different GPIO pins 3. Increased delay between reads Any help would be greatly appreciated! | |||||
| RE: Is Arduino still relevant in 2024? | 1 Relevance | 2 years ago | Harper | Arduino | |
| I totally agree with Jeff. Building a custom PCB including a microcontroller chip for a personal Project such as automating your room is one thing and you may even save a few bucks than buying the dev board separately. But when you WAnt to sell this product to consumers that's a whole different story. You can't possibly think that assembling some parts on 10 PCBs and saving money is anything like doing business. It takes a lot to create a profitable business out of this. | |||||
| Answer to: Is Arduino still relevant in 2024? | 1 Relevance | 2 years ago | nathan | Arduino | |
| Oh, I totally get where you're coming from, and you're making some valid points there. But like ESP32 boards which have WiFi and Bluetooth, some Arduino boards also offer these features. Now most of the Arduino boards don't have WiFi or BL but don't forget they are beginner-friendly, compatible with breadboards, versatile, and supported by a large community. While ESP32 may be better for some Projects, starting with Arduino provides a solid foundation. Both have their strengths; the choice depends on your Project's needs and your experience level. | |||||
| Maximum current limitation of a digital pin on UNO | 1 Relevance | 2 years ago | Harper | Hardware/Schematic | |
| Hey folks, I'm new to Arduino and tinkering with digital pins for a Project. I'm trying to control a DC motor that I've hooked up to one of the digital pins. I've heard it's important to stay within the current limits of the pins, around 40mA per pin. Can someone confirm this for me? And also, what happens if I exceed this limit while powering the motor? Will it damage my board? | |||||
| Answer to: ESP32 vs RP2040 – Which is better after Arduino? | 1 Relevance | 1 year ago | Janet | ESP32 | |
| The table below will definitely give you an idea of what’s best for you, according to me: If your Project needs wireless communication and more built-in features, the ESP32 is the better step forward.If you're experimenting on a budget or WAnt to dive deeper into hardware control, the RP2040 is also a great pick (especially the Pico W if you still WAnt Wi-Fi). Attachment : Screenshot-1583.png | |||||
| Answer to: What is the difference between ARM and AVR microcontrollers? | 1 Relevance | 1 year ago | Amelia | Arduino | |
| ARM and AVR microcontrollers differ significantly in architecture, performance, and typical applications. AVR microcontrollers are 8-bit devices based on a simple RISC architecture, making them easy to program and ideal for straightforward tasks. They usually operate at lower clock speeds and are commonly found in beginner Projects, basic robotics, and simple IoT devices. On the other hand, ARM microcontrollers are 32-bit (and sometimes 64-bit) devices with much more complex architectures. They offer higher processing power, faster clock speeds, more memory, and better power efficiency. ARM-based chips are often used in advanced IoT applications, real-time systems, wearable devices, and anything that demands higher performance or multitasking capabilities. AVR is generally better suited for simpler, smaller-scale Projects where ease of use is a priority, while ARM is a better fit for complex or resource-intensive applications. The choice between them depends largely on the Project requirements. | |||||
| Answer to: ESP32 Vs ESP8266? | 1 Relevance | 1 year ago | Admin | ESP32 | |
| Ok, I will make the choice of choosing between an ESP32 and ESP8266 as simple as possible for you: Price: If you check the online stores, the price of ESP32 is almost double that of the ESP8266. So if you have a tight budget, ESP8266 is the more WAllet-friendly option. Processing Power: The ESP32 has dual cores and more memory, making it faster and better at handling multiple tasks. The ESP8266 has a single core, which might slow things down if your Project is big. Extra Features: The ESP32 comes with Bluetooth (and sometimes more I/O pins), while the ESP8 ... | |||||
| Program to toggle LED state with a single button? | 1 Relevance | 1 year ago | tricky_logic | Programming | |
| ... tried using digitalRead() in a simple if condition, but I suspect I need to debounce the button properly. Should I use delay(), or is there a better approach using millis()? Here’s my basic code: const int buttonPin = 2; const int ledPin = 13; bool ledState = false; void setup() { pinMode(buttonPin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { if (digitalRead(buttonPin) == HIGH) { ledState = !ledState; digitalWrite(ledPin, ledState); delay(200); // Debounce delay? } } Is there a more reliable ... | |||||
| ESP32 or STM32: Which is better for IoT? | 1 Relevance | 1 year ago | TechPulse | ESP32 | |
| I'm planning an IoT Project but feeling confused about which microcontroller to choose. The ESP32 seems great for Wi-Fi and Bluetooth connectivity, but I've heard STM32 excels in performance and flexibility. I'm unsure how they compare in terms of power consumption, library support, and ease of development. Could someone clarify these points to help me decide? | |||||
| Answer to: Suggestions for Good ATtiny85 Projects | 1 Relevance | 1 year ago | Admin | Circuits and Projects | |
| Here are 15 amazing Project ideas you can create using the ATtiny85 microcontroller: LED Matrix AnimationProgram an LED matrix to display scrolling text or animations using the ATtiny85. Miniature Digital ThermometerBuild a small thermometer using a temperature sensor like LM35 or DS18B20 and display the data on a tiny OLED screen. IR Remote Control SystemDecode signals from an IR remote to control LEDs, fans, or other appliances. Sound Reactive LightsCreate an audio visualizer where LEDs blink in response to sound or music using a microphone module. Capacitive Touch SwitchMake a touch-sensitive button using a conductive surface and the ATtiny85, perfect for smart home switches. Portable Motion DetectorUse a PIR sensor to build a portable motion detection alarm system for security purposes. USB Volume ControllerTurn your ATtiny85 into a USB HID device to control your computer’s volume with a rotary encoder. Tiny Weather StationMeasure temperature and humidity with sensors like DHT11/DHT22 and display the readings on an OLED. Ultrasonic Distance MeterUse an ultrasonic sensor to measure distances and display them on a small display. Blinking Bicycle LightCreate a small, energy-efficient blinking tail light for a bicycle, powered by a coin cell battery. Minimalist USB Game ControllerBuild a simple game controller for retro-style games with buttons connected to the ATtiny85. PWM Fan Speed ControllerControl the speed of a DC fan using pulse-width modulation and a temperature sensor for feedback. ATtiny85 Robot BrainPower a small robot with an ATtiny85, controlling motors and sensors for basic navigation. Night Light with Light SensorCreate an automatic night light that turns on in low-light conditions using an LDR and LEDs. Tiny Digital StopwatchDesign a simple stopwatch with start, stop, and reset functions using push buttons and an OLED display. These Projects highlight the versatility of the ATtiny85 and can help you learn more about electronics, programming, and sensors. This site is hands down the best for Projects related to ATtiny85. So, definitely check it out. | |||||
| Answer to: What is the difference between Arduino Nano Every and Nano RP2040? | 1 Relevance | 1 year ago | Admin | Arduino | |
| Well, these two are very different boards if you look at the specs. I do not understand why you are confused between these two boards. Arduino Nano Every: This board does not include built-in Wi-Fi or Bluetooth capabilities. It's suitable for Projects that don't require wireless communication or where such features can be added externally if needed. Priced at approximately €15.30 (around ₹1,350), it's a cost-effective choice for basic Projects. Arduino R02040 Connect: Equipped with the u-blox NINA-W102 module, it offers both Wi-Fi and Bluetooth connectivity. This makes it ideal for Internet of Things (IoT) Projects or applications requiring wireless communication. Available for about €30.70 (around ₹2,700), reflecting its enhanced features and connectivity options. Which One Should You Choose? Nano Every: If you’re on a budget, don’t need wireless connectivity, or are working on simple Projects, this is an excellent choice. Nano RP2040 Connect: If your Project needs built-in Wi-Fi or Bluetooth, or if you’re exploring more advanced or resource-intensive applications, this is the better option. | |||||
| How to choose coupling capacitor sizes for an audio amplifier? | 1 Relevance | 2 years ago | techy ishan | Theoretical questions | |
| Hi everyone, For my new Project, I am building an amplifier circuit to achieve clear sound. However, I am unsure about the appropriate capacitance values to use for the coupling capacitors. Any advice or guidance would be greatly appreciated. | |||||
| Answer to: Suggest some good Arduino books? | 1 Relevance | 2 years ago | Amelia | Arduino | |
| Great to hear you’re diving into robotics! Here are a few books that I’ve personally found helpful: Arduino Robotics by John-David WArren This book is packed with robotics Projects and explains how to integrate motors, sensors, and actuators into robotic systems. It’s beginner-friendly but dives deep into practical applications. Programming Arduino: Getting Started with Sketches by Simon Monk While this book isn’t robotics-specific, it’s an excellent introduction to Arduino programming. You can combine this with a robotics-focused guide for a complete ... | |||||
| Answer to: Suggest some good Electronics books? | 1 Relevance | 2 years ago | TechTalks | Theoretical questions | |
| There are many books available in the market and online that are commonly recommended. Here are five of the most notable ones: Practical Electronics for Inventors – Paul Scherz Ideal for hands-on learners, with practical examples and troubleshooting tips. The Art of Electronics – Paul Horowitz A comprehensive guide covering both analog and digital electronics. Make: Electronics – Learning by Discovery Perfect for beginners, featuring Project-based, visual learning methods. How to Diagnose and Fix Everything Electronic – Michael Geier Focuses on troubleshooting, repair techniques, and diagnostics. Getting Started in Electronics – Forrest M. Mims Beginner-friendly, with simple Projects and clear illustrations. These books cover a broad range of topics, from basic fundamentals to advanced concepts, making them suitable for learners at various levels. | |||||
