Normally we need to add a 220 Ohm resistor with LED for Arduino dev boards and similar works. Not only making that on breadboard wastes time, but also it takes time to either check the value of resistor manually or using a multimeter. The thing we made looks great and quite useful for day to day electronics development works for simple "plug and plan". We saw the idea somewhere and recreated it to … [Read more...]

This idea is good for automatic turning on and off multiple lights one by one while a person is walking staircase or walking through a passage or hallway. As IR Obstacle Sensors has physical limits, we can not use if the passage is wide like a road - it will fail for physical reasons. Human is not much thick too! In our previous guides - Arduino IR Obstacle Detection Sensor For Dimming LED and … [Read more...]

Why They RX/TX LEDs Blinks Upon Code Uploading? How History of Terminal Relates to it? What Are RX/TX LEDs and Pins on Arduino Boards? History of old Terminal, Telegram and Broadcast engineering. Around 150 years back, we had only way to communicate is sending pulses of current. That was the starting of analog means of connection. Slowly, when telegram improved, terminal devices became faster … [Read more...]

Why we are going towards apparently easy tutorials on Arduino than couple of years back? These basic projects with components are helpful to learn using sensor based logic. Was not LCD with LDR was difficult project? Why Automatic LED Control Using LDR and Arduino looks simillar? Our older guides were mostly just using modules with libraries and this guide has more at the end for creating complex … [Read more...]

You definitely noticed that, for the same sensor, in some project we use Analog pin, but in some other project we use Digital pin. The analog pins on the Arduino can be used as digital outputs. There is another word or phrase - PWM. Pulse Width Modulation (PWM) is a method for getting analog results by digital means, like fading LED. Let us Discuss the Difference Between Analog and Digital Pins in … [Read more...]

It is Very Easy, Cheap and You Need Only One LDR, Resistor and LED. Here is Circuit Diagram and Schematic To Build Automatic LED Control Using LDR and Arduino Project. In previous guides on LDR, we created light measurement instrument and light meter. However, for Arduino Door Bell like project, to add more logic of sensing day and night, we need LDR like basic sensor. This guide is one foundation … [Read more...]

We Can Use Transistor To Have Some Loudness. How To Make a Piezo Buzzer Louder is a Commonly Asked Question By Whoever Use Arduino. We talked about transistor in our old post listing common transistors. But that is not all the answer. The Piezo Buzzer itself not any standardized hardware - you need to find buzzer which is itself loud.   How To Make a Piezo Buzzer Louder With … [Read more...]

The intention is to buy few of them to keep DIY stock supply handy. Integrated Circuit (IC) and Microcontroller, Programmable Microcontroller has difference, although they look similar and may be they are also "IC" in some way. IC weawre going to discuss usually nothing but just a circuit with basic electronic components inside in miniature form. Microcontrollers are usually more costly and … [Read more...]

First, we made IR Obstacle Detection Sensor For Dimming LED (Stop Event Facing Obstacle), then we made 2 Push Button One LED to Switch On/Off project. Here is Circuit Diagram and Code To Make LED Switch On By Push Button Switch Off By IR Obstacle Sensor and Arduino Board. In next guide, we will improve our Arduino Door Bell - door bell will start with glowing LEDs upon button press and stop when … [Read more...]

Transistor is kind of scary to many beginners as most commonly, transistors are not given importance than vacuum tubes within twelfth grade course. Here is Kind of List of Common PNP, NPN Transistors For Arduino, Raspberry Pi Projects for the Beginners. Also, in this article, we will discuss basics around transistors. Transistor can be used as a switch or an amplifier. Our guide to use buzzer with … [Read more...]

The thing sounds like childish. It is True That is Very Easy Yet It is Important Basic Behind Using Sensors to Switch On/Off an Event. Here is Circuit Diagram and Code For Arduino 2 Push Button One LED to Switch On/Off Project. In our older how to guide, we have shown IR Sensor to switch off LED. As upgrade of the project, we can use that IR Sensor to switch off LED instead of pushing it with … [Read more...]