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Key Features:

• Compatible with HT12E encoder IC

• 12-bit data decoder: 8 address + 4 data bits

• Works with RF and IR transmission modules (433MHz)

• Low power consumption, built-in oscillator

• Ideal for wireless remote control applications

• Standard 18-pin DIP package for easy breadboard use

Product Description (Detailed):

The HT12D Decoder IC is part of the Holtek 212 series, specifically designed to work in tandem with the HT12E encoder. It is widely used in wireless remote control systems using RF or infrared communication.

This IC decodes 12-bit serial data (8 address bits + 4 data bits) transmitted by an HT12E encoder over an RF or IR link. The VT (Valid Transmission) pin goes HIGH when a valid signal is received, and the output pins (D0–D3) reflect the transmitted data.

This makes the HT12D ideal for controlling relays, motors, lights, and other appliances wirelessly with the help of 433MHz RF modules.

Technical Specifications:

How to Use:

1. Connect HT12D to a 433MHz RF receiver module.

2. Match the address pins (A0–A7) on both encoder (HT12E) and decoder (HT12D).

3. Apply a 51KΩ resistor between OSC1 and OSC2 pins.

4. Use VT pin to detect valid transmission.

5. Read data from D0 to D3 output pins to control loads like relays, LEDs, etc.

Ensure proper power supply (typically 5V) and correct address matching for accurate communication.

Applications:

• RF-based wireless remote control systems

• Home automation and wireless switching

• Robotics – wireless control of motors and actuators

• Garage door and gate control

• RFID tag & access control systems

• Infrared remote data reception

Package Includes:

• 1 × HT12D Decoder IC – 18-pin DIP