Learn — Guide

MQ-2 Smoke Sensor Guide

Posted by Kelly M on

MQ-2 Smoke Sensor Guide

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...

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MQ-3 Alcohol Ethanol Gas Sensor Guide

Posted by Kelly M on

MQ-3 Alcohol Ethanol Gas Sensor Guide

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...

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DSO138 Oscilloscope Kit Guide

Posted by Kelly M on

DSO138 Oscilloscope Kit Guide

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...

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Rotary Encoder Module Guide

Posted by Kelly M on

Rotary Encoder Module Guide

The rotary encoder is a type of position sensor that is used to determine the angular position of a rotating shaft and converts to analog or digital output signals.  In this article, we'll talk about how to wire and set up the module for operation with an Arduino Board.  Wiring  The rotary encoder module operates at 5V and produces an analog or digital output. There are many different types of rotary encoders in the market which are classified by output signals or sensing technology. However, we will be using Rotary Encoder Module, the one we carry in our shop.  Parts Rotary Encoder Module Arduino Uno R3 BreadBoard Jumper...

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SW-420 Vibration Sensor Guide

Posted by Kelly M on

SW-420 Vibration Sensor Guide

The SW-420 Vibration Sensor Module is a useful module for detecting vibrations over a threshold point and provide digital data, 0 or 1. It uses an LM393 comparator to detect and it can work from 3.3V to 5V.  In this article, we'll talk about how to wire and set up the module for operation with an Arduino Board.  Wiring This module can work from 3.3V to 5V. In this project, we will use 5V to power the module. During normal operation, the sensor provides Logic Low and when the vibration is detected, the sensor provides Logic High. There are several...

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