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) or an anode…
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ESP32 Starter KitA collection of 20 posts
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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 blue LEDs on…
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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 digital systems like…
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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 display numbers in…
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Buzzer
A buzzer is a small electronic device that produces sound when powered. It is commonly used in alarms, notifications, and indicators in various electronic projects. There are two…
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Project – Active Buzzer
An active buzzer is a self-contained unit that generates sound when power is supplied to it. It has a built-in oscillator, so you only need to provide a…
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Project – Passive Buzzer
A passive buzzer requires an external signal to create sound. It does not have a built-in oscillator, so it relies on a square wave signal or frequency input…
2 Min Read
Project – Musical Doorbell
Let’s create a simple music doorbell using a button and a passive buzzer! When a guest presses the doorbell button, the music will play. Wiring Instructions: With this…
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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 device increases. It…
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