Here we discus about ASK Transmitter and receiver circuits. The HT12E IC used for Encoding operations for any applications.The 2 x 12 encoders are capable of encoding information which consists of N address bits and 12N data bits. Each address/data input can be set to one of the two logic states. The programmed addresses/data are transmitted together with the header bis via an RF Module transmission. HT12E Applications: 1. Alarm systems. 2. Smoke Alarm. 3. Fire Alarm. 4. Door controller. 5. Security systems. 6. Cordless Telephones. 7. Remote Control Applications. FEATURES: 1. Use RF315/433Mhz Transmitter and Receiver Module. 2. Range in operation 100 Meters. 3. 3V to 12V Operation. 4. Low power = $0mA. 5. Modulation Type: ASK. 6. Transmission Power = 25mW. 7. Low Stand by current. 8. Built-in-oscillator. CIRCUIT DIAGRAM FOR TRANSMITTER MODULE. HT12D Decoder (Receiver) Details: The Decoers receiver serial addresses and date from a programmed series of encoders the are transmitted by a carrier using an RF of an Ir Transmission medium. Features: Operating Voltage from 3V V to 12 V. Working Current:6 ma. Demodulation: ASK Binary address setting. Received codes are checked 3 times. Transmission indication. Easy interface with MCU. CIRCUIT DIAGRAM FOR RECEIVER MODULE
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