Transmitter design scheme
Transmitter Ambient control sensitive light Manual mode Antenna Ambient control mode On/off switch MIC
Logic Block Diagram Transmitter antenna Status direction Function button circuit Sound control chip Spansion signal processing unit A/D coded conversion output Filter enlarge Voltage-stabilizing and filter Microphone 12V battery Radio-frequency carrier shift signal output Coded signal High frequency local oscillator signal modulate 433.
Principle of operation • This product use 433.92MHZ high-frequency RF technology scheme. The electrocircuit include transmit antenna, self-oscillating, MCU, button circuit, Status direction, audio-frequency signal enlarge commutate and Voltage-stabilizing circuit. • Main control chip via button scan identify to make the instruction in digital analysis process. Or collect the analog signals by MIC to enlarge through filtering.
Electrical Specification • Supply voltage: 23A battery 12VDC • Transmit range: main wave +17DB second harmonic -18DB • Transmit frequency: 433.
• • • • • • • • • • • • • • • FCC Statement 1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
