LearnCreateEnjoy

Teaching sensors, electronics and embedded systems

Learn | Create | Enjoy means learn, make and enjoy making.Follow sensor training, project-based courses and applied electronics, embedded and IoT articles in one place.

View courses Articles Products

Practical training updates

Latest educational articles

Sensor Guides View all articles

Power and Batteries

Power Bank Usable Capacity: mAh, Wh and Phone Charge Estimates

Understand power bank mAh vs Wh, calculate usable USB capacity and estimate phone charges with explicit assumptions and measurement boundaries.

Embedded fundamentals

Arduino Uno Button Input: Pull-Up and Bounded Debounce

Read an Arduino Uno button with INPUT_PULLUP and a bounded debounce state machine. Download tested code covering held buttons, short pulses and millis rollover.

Embedded fundamentals

PC817 Optocoupler: LED Resistor, CTR and Pull-Up Design

Calculate a PC817 LED resistor, understand CTR test conditions and choose an output pull-up, with a real photo, schematic and verified product links.

Reference learning guides

Electronics Tutorials: From Fundamentals to a ProjectLearn electronics through circuit fundamentals, components, power, measurement and practical projects, with a clear reading path and reviewable outcomes. Embedded Systems Tutorials: From Basics to a ProjectBuild an embedded learning path through C/C++, GPIO, timers, interrupts, interfaces and debugging, with a compiled example and proposed projects.

LCENJ practical learning pathway

From knowing the sensor to building a real embedded system

Learning sensors begins with knowing the technical specifications and the correct way to read the datasheet. In LCENJ training, you will learn about temperature, humidity, light and distance sensors. Each article explains wiring, measurement range, accuracy, error, and installation tips. Practical examples help you better understand the difference between a laboratory measurement and stable performance in a real product. The purpose of this path is to choose the right sensor and receive reliable data.

After selecting the sensor, it is time to connect it to the microcontroller and data processing. Articles and courses teach step-by-step how to work with ESP32 and embedded systems. Protocols such as I2C, UART, and One-Wire are explored with working examples. We also talk about noise filtering, calibration, error handling and power consumption. These skills are essential for building measurement tools, smart equipment, and IoT projects.

LCENJ content is designed for project-based learning. You can start with a short article and then move on to a related course. Code samples, technical illustrations, and circuit explanations help turn theoretical knowledge into practical experience. Tracks cover topics such as circuit design, firmware programming, and prototype testing. By following related material, you will progress a problem from part selection to result analysis and creation of a presentable sample.