I’m a design technologist in Atlanta. I like working on the front-end of the web. This is my site, Zento where I blog, share and write tutorials…
The Birth of the 74 Series The 74 series ICs started back in the 1960s. Texas Instruments…
In the previous project, we learned how to control an RGB LED using digitalWrite. By using digitalWrite,…
RGB LEDs have three individual LEDs inside—red, green, and blue. These LEDs usually share a common connection,…
Let’s create a simple music doorbell using a button and a passive buzzer! When a guest presses…
A buzzer is a small electronic device that produces sound when powered. It is commonly used in…
A passive buzzer requires an external signal to create sound. It does not have a built-in oscillator,…
An active buzzer is a self-contained unit that generates sound when power is supplied to it. It…
Overview In this project, we’ll build a PIR motion sensor system with an ESP32. When motion is…
A PIR (Passive Infrared) sensor is an electronic device that detects motion by measuring infrared (IR) radiation…
In this project, we will build a distance measurer that can measure distances up to 4 meters…
Overview An ultrasonic sensor is an electronic device used to measure distance or detect objects by emitting…
“Hello, World!” is often the first step into programming on a PC, a simple tradition that welcomes…
Project “Hello World” The “Hello, World!” program is a tradition in programming, often the first written by…
TroubleShooting Arduino IDE Serial Noise The Arduino IDE uses Serial communication to transfer data from the computer…
USB to Serial Chip The USB to Serial chip in the ESP32 is responsible for translating the…
Installing Arduino IDE Adding ESP32 Support Step 1: Configure Board Manager URL The link https://dl.espressif.com/dl/package_esp32_index.json is the…
The ESP32 is a powerful and versatile microcontroller that supports Wi-Fi and Bluetooth connectivity, making it a…
Before the ESP32, Arduino reigned supreme as the king of hobbyist microcontroller units (MCUs). It offered simplicity,…
Getting Started Have you ever wondered how everyday electronic devices work? Now you can learn to create…
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