Home / Roland


Roland is the brains of Teach Me Micro. He is a firmware engineer who have seven years (and counting) of experience in developing electronic and microcontroller-based systems. Roland's designs include medical devices, security and automation, robots, emergency alert systems and educational training modules. He is open to consultation or firmware projects: just contact him via the contact page.

How to Use the MQ-3 Gas Sensor

The MQ-3 gas sensor is useful for projects that tests levels of alcohol, benzine, hexane or LPG in the air but it is most popularly used as a breathalyzer (breath analyzer) for someone who drank beer, wine or other liquor. Learn how to use this sensor in this tutorial.

Read More »

How to Use L298N Motor Driver

L298N Motor Controller Tutorial

You can drive a LED on or off using a microcontroller like Arduino or PIC. There’s no problem there because the 20 mA or so current from the pins is enough. Obviously, you can’t drive loads that require much more current like a motor. This is where the L298N motor …

Read More »