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Universal Mini Infrared (IR) Remote Control – 21-Key Wireless Transmitter for Arduino, DIY Audio Players, Robotics, and Smart Home Projects

Parameter	Detailed Specification
Transmission Frequency	38 kHz
Key Count	21 Keys
Transmission Range	8 – 10 Meters (Standard Environment)
Effective Angle	60 Degrees
Battery Type	CR2025 Button Cell (Included)
Static Current	3 – 5 uA
Dynamic Current	3 – 5 mA
Dimensions	86 mm x 40 mm x 6 mm

Price

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₹ 25.42

(Tax included)

Barcode: 4831243

Product Description

Empower your projects with wireless control using the Universal Mini Infrared (IR) Remote Control. This ultra-slim, 21-key transmitter is a favorite among the maker community for its reliable 38kHz signal and ease of integration. Whether you are building a remote-controlled robot, a custom MP3 audio player, or a smart home lighting system, this remote provides a tactile and responsive interface. At Robogears, we recommend this remote for its standardized encoding, which is fully compatible with popular IR receiver modules (like the TSOP1838 or VS1838B). The compact design features a durable membrane keypad and includes a pre-installed CR2025 battery, making it a ready-to-use solution for your Arduino or ESP8266 prototypes.

Detailed Key Features

Versatile 21-Key Layout: Features a comprehensive set of buttons including 0-9 digits, directional arrows, OK, Volume, and Power, suitable for complex menu navigation.
38kHz Industry Standard: Operates on the standard 38kHz carrier frequency, ensuring compatibility with almost all generic IR receivers and library frameworks.
Ultra-Thin & Portable: The sleek 6mm profile makes it easy to integrate into project kits or handheld controllers without adding bulk.
High-Efficiency Battery Life: Consumes negligible power in standby mode (static current <5uA), ensuring the button cell lasts for thousands of clicks.
Tactile Membrane Switches: Designed with high-quality silicone-based membrane keys that provide satisfying click feedback and long-term durability.

All Technical Details

Modulation Type: Pulse Distance Width (typically NEC protocol).
Button Life: >100,000 presses.
Infrared Wavelength: 940 nm.
Environmental Resistance: Operational in temperatures from -25°C to +55°C.
Material: High-grade ABS and flexible membrane.

Prototyping & Engineering Tips (Robogears Exclusive)

Library Integration: For Arduino users at our Pimpri facility, we recommend using the IRremote library. Use the "SimpleReceiver" example to decode the unique HEX codes for each button on this specific remote.
Protocol Identification: Most of these mini-remotes utilize the NEC Protocol. When coding, ensure your receiver logic is set to decode NEC to avoid getting "unknown protocol" errors in your serial monitor.
Line of Sight: Since this is an Infrared (IR) device, it requires a direct line of sight. If your robot is hiding behind a chair, the signal won't reach it! For 360-degree control, consider placing multiple IR receivers around your project.
Battery Guard: The remote comes with a small plastic "pull-tab" to prevent the battery from draining during storage. Ensure you remove this tab before your first test.

Package Includes

1 x 21-Key Mini IR Remote Control
1 x CR2025 Button Cell (Pre-installed)

Image Disclaimer

Product images are shown for illustrative purposes only. The icon designs on the membrane (e.g., "CH-" vs "EQ") may vary slightly depending on the latest manufacturing batch, but all 21-key functions and the 38kHz technical specifications remain as described.

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