21-Key Infrared (IR) Remote Control for Arduino & ESP32

The 21-Key Infrared (IR) Remote Control is a compact handheld transmitter designed for wireless control of electronics and embedded systems using infrared signals. It is widely used in Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other microcontroller projects together with standard IR receiver modules such as the HX1838, VS1838B, or TSOP series.

With 21 responsive buttons, it is ideal for controlling robots, smart home devices, media controllers, LED lighting, menu navigation, and DIY automation projects.

Features
21 tactile control buttons
Standard 38kHz infrared transmission
Compatible with common IR receiver modules
Lightweight and ergonomic design
Long transmission range (up to approximately 8–10 meters)
Low power consumption
Ready to use with Arduino IR libraries
Applications
Arduino Projects
ESP32 & ESP8266 Projects
Raspberry Pi Projects
Robot Control
Home Automation
Menu Navigation Systems
DIY Electronics
Learning and Educational Projects
Specifications
Type: Infrared Remote Control
Number of Buttons: 21
Carrier Frequency: 38kHz
Operating Distance: Up to 10m (line of sight)
Power Supply: 1 × CR2025/CR2032 Coin Cell Battery (varies by version)
Communication: Infrared (IR)
Package Includes
1 × 21-Key IR Remote Control