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Roland Pelayo

Roland is the brains of Teach Me Microcontrollers. He is a firmware engineer who have ten 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. Besides writing for TMM, he currently heads the Electronics Engineering Program of Holy Cross College in Davao City. He was also once a technical editor of All About Circuits and Maker.Pro Roland is open to consultation or microcontroller firmware projects: just contact him via the contact page.

Designing a PCB for the RP2040 Microcontroller

Using the Raspberry Pi Pico is convenient, but as you level up your project, you’ll find that it is much better to create your own PCB that satisfies your design requirements. If you have designed PCB boards for STM32 microcontrollers before, then you’ll find that it is not much different …

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Using Rotary Encoders with Arduino

incremental rotary encoder

There exists a sensor for almost all physical parameters. Temperature? Pressure? Weight? Gas Concentration? We’ve written a tutorial for them all on this site. This time, we will try to build a device that measures rotational position. The same device can measure rotational speed too. Of course, we’re talking about the …

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Raspberry Pi Pico Pinout

Raspberry Pi Pico Pinout

The Raspberry Pi Pico is a microcontroller development board built by the same makers of the Raspberry Pi. As seen in the Raspberry Pi Pico pinout diagram below, it has 40 GPIO pins with 3 analog inputs. It features the RP2040, a 32-bit dual ARM cortex M0+ microcontroller chip with …

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Using an E-ink Display with Arduino

e-ink display front

Ever wondered why e-book readers don’t use LCDs, OLEDs, or TFT displays? This is because, with the same usage, e-paper or e-ink displays consume 0.008% power compared to a TFT display. In this article, I’ll be featuring an e-ink display that can be readily used with Arduino and other microcontrollers.

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Get Any Reddit Post using ESP32

Reddit’s API has been piquing my curiosity for some time. However, my past experiences with APIs, especially with Twitter and Facebook have left a bad taste in my mouth. Then one day I had the courage to try it again and to my surprise, it’s far easier than it looks!

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Working with ESP32, GPS and Google Maps

ESP32 NEO6M-GPS wiring

When working with IoT, it’s often necessary to track a device’s location for monitoring. Global Positioning Service (GPS) remains the number 1 option for large-area tracking. This project will show you how you can use a GPS with an ESP32 and have the location plotted on Google Maps.

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Ultrasonic Door Lock with WiFi Control

ultrasonic door lock wiring diagram

For this project, I am using an HC-SR04 ultrasonic sensor for opening a solenoid door lock. Basically, the ultrasonic sensor acts as a proximity detector. A solenoid lock triggers when an object blocks the sensor at a given distance. In addition, a web app can act as WiFi remote control …

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How to Run a BMW VIN Number Lookup?

Are you interested in learning the details of a BMW? Better still, you can learn all the options the vehicle is equipped with. Thanks to VIN online decoders like BMW VIN decoder you can learn all about a BMW through its VIN. In this post, you will learn how to …

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