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…
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…
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…
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…
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…
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…
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…
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…
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)…