Household advance working remote control circuit - transmitter circuit

This device allows you to return home from work and eat
meals prepared by the rice cooker or microwave oven; in the hot summer, the air conditioner has been turned on in advance, bringing you comfortable
coolness. Save time and provide convenience to your life. To achieve this, you only
need to use the home appliance remote control to advance for half an hour within 3km and press
a button. ．
    (1) Working principle This device consists of a transmitter circuit and a receiver circuit
.
    1) Transmitter circuit: The transmitter circuit is as shown in the figure. , integrated circuit
lCI (NE556) and peripheral components Ri, Hurricane, CJ, G form a pulse oscillator
, and IC2 is a fixed carrier frequency wireless transmitting component. 1C2 modulates
the frequency signal according to IC1 and transmits it through the transmitting antenna. Control the two-way power socket of the receiver (that is, the power socket for which the circuit is to be turned on remotely).