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Roland Pelayo

I started TMM back in 2015. I’m a firmware and embedded systems engineer with over ten years of experience designing and developing electronic and microcontroller-based products. Over the years, I’ve worked on a wide range of projects, including medical devices, access control and security systems, automation, robotics, wireless communication modules, IoT systems, imaging and sensor instruments, and educational training tools. I’ve built systems using platforms such as PIC, AVR, ESP32, STM32, nRF52, and Raspberry Pi, and I regularly work with protocols like RS485/OSDP, CAN, TCP/IP, Wiegand, and a variety of sensor and communication interfaces. I also develop full-stack solutions for embedded projects, combining firmware, hardware, and web-based dashboards when needed. If there’s a topic you’d like me to write about, or if you need consultation or hands-on development for electronics, embedded, or firmware projects, I’m always open to working on new ideas and collaborations. You can reach me anytime through the contact page.

Using an NPK Sensor with Arduino

arduino NPK sensor wiring diagram

We’ve featured in a previous project how we can make a “plant” send messages when it needs more water. Of course, healthy plants don’t only need water; the soil in which they are planted must also be abundant in a number of chemicals. Is there a sensor that does this? …

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5 Best Apps to Make Internet Calls in 2023

The best apps to make internet calls allow free local and international connections. People can now make free calls from their computer or mobile device by downloading a free talk and text app with an internet calling feature. All that one needs to do to make a call is use …

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10 Things All Gamers Must Have the Perfect PC Setup

There is no denying that investing in the perfect gaming setup is of paramount importance for any gaming enthusiast or frequent streamer. If you have the time, you can visit tech forums to learn in-depth details about any product you're thinking about purchasing to best represent your individual style.

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Self Seal Bag

A self-seal bag, also known as a self-sealing bag or a resealable bag, is a type of packaging bag that features a built-in closure mechanism for easy and secure sealing.

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Bow Tie Shirt

A bow tie shirt refers to a type of shirt that is designed with an attached or detachable bow tie incorporated into the collar area. It combines the elements of a traditional button-down shirt with the elegance and charm of a bow tie, creating a unique and stylish look.

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How can directional sound be utilized well?

Directional speakers distinguish themselves from conventional loudspeakers through their ability to project sound in specific directions with high precision and control. While conventional loudspeakers emit sound in a wide dispersion pattern, spreading the audio waves in all directions, directional speakers by companies like Focusonics employ various techniques to focus and …

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