Hi, I’m Jonathan Doe 👋

February 4, 2025

1 Min Read

Project – Temperature Measurement

To use an NTC thermistor with the ESP32, you need to connect it in a voltage divider configuration. Here’s how you can do it: Components…

February 4, 2025

1 Min Read

NTC Temperature Sensor

An NTC (Negative Temperature Coefficient) sensor is a type of temperature sensor whose resistance decreases as the temperature increases. This behavior is the opposite of…

February 4, 2025

3 Min Read

Project – Smart Sunrise Alarm

In this project, we’re going to design a smart sunrise alarm that uses a light-dependent resistor (LDR) and an active buzzer. This clever alarm will…

February 4, 2025

1 Min Read

Voltage Divider Circuit

Voltage Divider Explanation A voltage divider is a simple circuit made of two resistors connected in series. It is used to scale down a voltage…

February 4, 2025

1 Min Read

Photoresistor Sensor

A photoresistor (also known as a light-dependent resistor or LDR) is a type of resistor whose resistance decreases as the intensity of light hitting the…

February 4, 2025

4 Min Read

Project – Binary Display

In this project, we’re going to create a fun binary counter using the 74HC595 shift register and 8 LEDs. The LEDs will light up to…

February 4, 2025

2 Min Read

74HC595 8-Bit Shift Registers

The Birth of the 74 Series The 74 series ICs started back in the 1960s. Texas Instruments (TI) created these chips to help engineers build…

February 4, 2025

1 Min Read

Project – RGB LED (Analog)

In the previous project, we learned how to control an RGB LED using digitalWrite. By using digitalWrite, we could turn the internal red, green, and…

February 4, 2025

2 Min Read

Project – RGB LED (Digital)

RGB LEDs have three individual LEDs inside—red, green, and blue. These LEDs usually share a common connection, which can either be a cathode (negative terminal)…