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The flame sensor module consists of an IR receiver, resistor, capacitor, potentiometer, and a comparator LM393 in an integrated circuit. It can detect infrared light with a wavelength ranging from 700nm to 1000nm. The flame probe converts the light detected into the form of infrared light into current changes.    The flame sensor module operates between 3.3V to 5V DC with a digital output that indicate the presence of a high infrared signal. When it is triggered, it will output a HIGH.    How it works The flame sensor is very sensitive to IR wavelength. The analog output (A0) outputs a...

The MQ-2 Smoke Sensor is a very popular module for detecting smoke and to flammable gases like LPG, Butane, Propane, Methane, Alcohol, and hydrogen. It outputs different voltage accordingly to the smoke/gas level that exists in the atmosphere. The sensor outputs a voltage that is proportional to the concentration of smoke/gas. In other words, the greater the gas concentration, the greater the output voltage. The lower the gas concentration, the lower the output voltage.  The smoke sensor has a built-in potentiometer that allows you to adjust the sensor sensitivity according to how accurate you want to detect gas. It has...

The MQ-3 sensor is one of the most commonly used sensors in the MQ sensor series. It is a chemiresisotors because sensing is based on the change of resistance of the sensing material when it is exposed to alcohol.  In this article, we will talk about how to wire and set up the module for operation with an Arduino Board.   Wiring  MQ-03 alcohol sensor operates at 5V DC and draws around 800mW. It can detect alcohol concentrations anywhere from 25ppm to 500 ppm. It comes with both the digital and analog output pins. The analog output voltage provided by...

Our DSO138 Oscilloscope Kit is designed for ease in assembly and operation as all the parts are pre-soldered and the MCU has been pre-programmed with no additional requirement for programming. It uses a 2.4 inch TFT LCD as its display element that will display nice clear waveforms. If you don't like the default program, you can also upgrade or hack it for your application. In this article, we will walk you through the set up and the operation with Oscilloscope Kit.  The kit comes with all the parts that have been soldered onto the PCB board, and 3 instructions manual.  Parts DSO138 Oscilloscope Kit 12V...

The Infrared Sensor Module (TCRT5000) with Adjustable Reference is a Line Tracking Module. It is an infrared distance module most used for robot applications like a line following robot car, product line decoder and much more. This module can adjust the sensitivity distance from 2cm to 40cm by twisting the potentiometer clockwise and anti-clockwise.  This article will talk about the pinout and wiring of the module operating with an Arduino Board. At the end of the tutorial, you will learn how to build a line decoder to detect objects. Wiring  The infrared module operates at 3V to 5V DC and produces...