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How To’s

Arduino I2C LCD Backpack

How to Use I2C LCD with Arduino

The classic parallel LCD sometimes post a problem for projects that use a lot of Arduino pins. The least amount of pins you can use is six, excluding the power pins and the potentiometer contrast adjust (optional) pin. Thankfully, by using an I2C LCD "backpack", the pin use can be …

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Arduino BMP085 Tutorial

The BMP085 is a relatively cheap barometric pressure sensor from Bosch. I believe this sensor is kinda old (no information about this device is found on the Bosch site) and yet it’s still used today because of its simplicity. This Arduino BMP085 tutorial covers the basics of using this device …

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Using RFID with Raspberry Pi Zero

Using RFID cards and tags is a cool way to switch on anything, wirelessly. For example, you can create an e-lock for your room, check meeting attendance or use cards to control your robot. In this tutorial, we will add RFID functions to a Raspberry Pi Zero.

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SW-420 Vibration Sensor breakout board

Vibration Sensor Tutorial

Vibrations can be an indicator that trouble is coming. It can be your machine going haywire, a gear on a robot missing a teeth, or worse, a looming earthquake! In this vibration sensor tutorial, we will look at how to detect vibrations using especially designed sensors and an Arduino microcontroller.

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Arduino Relay module

Arduino Relay Module Tutorial

A relay is commonly used to interface a low-current circuit to a higher-current circuit. As such, it’s very useful in controlling appliances and other mains-powered devices using microcontrollers. In this Arduino relay tutorial, I will show you how to use a relay with microcontrollers.

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How to Use the MQ-7 Carbon Monoxide Sensor

The MQ-7 carbon monoxide sensor is especially designed to be sensitive to carbon monoxide (CO) gas which is emitted by vehicles, factories, etc. Since this gas is considered toxic to humans at certain levels, concentration of CO is used to determine the air pollution in a given area.

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arduino fire detector

Creating a Simple Arduino Fire Detector

A fire or flame sensor is simply an infrared LED with an amplifier circuit. Flame radiates infrared signal, which triggers the LED to produce current. This current is converted to voltage for an analog to digital converter to read. Let's see how we can build an arduino fire detector using …

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Raspberry Pi Zero Bluetooth

Setting Up Raspberry Pi Zero Bluetooth

The Raspberry Pi Zero W comes with both WiFi and Bluetooth connectivity. I have already covered how to turn on WiFi on my previous tutorial. Now, let’s look at how to set up a Raspberry Pi Zero bluetooth connection without a GUI.

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E32-TTL-100 SX1278 LoRa Module

How to Use the E32-TTL-100 SX1278 LoRa Module

LoRa is a promising low-power, long range wireless transmission protocol developed by Semtech as part of the emergence of Internet of Things (IoT). Simply put, it is a method for sending data separate from WiFi, Zigbee or Bluetooth. Its low power consumption amidst very long range of transmission (up to …

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