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More than Circuit EngineeringThe encoded AM/FM radio control system
Ñõåìû >> Circuits in Practical Use >> The encoded AM/FM radio control systemThe
encoded AM/FM radio control system
The radio control system works on frequency about 418 MHz. Application:
controlled from distance opening of gates of garage, switch on signaling or
alarm system, switch on illumination and etc. Cruising radius 300 m. Fig.1 the
circuit of transmitter, where S5 sets a definite code, IC1 (HT6014) – encoder, IC2 (AM-RT4-418) –
the RF transmitter (for FM FM-TX2-418-3V on fig.2) is used. By S1, S2, S3, S4 it
is possible to handle four devices on a receiving side. Fig.5 the circuit of receiver, where IC1 – the RF
receiver, S1 must be set in the same position, that S5
in a transmitter, IC2 (HT6034) – decoder, RLA2….RLA5 – relays. Fig.3 – circuit of antenna of the receiver, fig.4 –
circuit of antenna of the transmitter.
Fig.1. Transmitter
Fig.2. RF transmitter
Fig.3. Antenna of the receiver
Fig.4. Antenna of the transmitter
Fig.5. Receiver
(Click to enlarge the Circuit)
Literature: “Everyday Practical Electronics/ETI” ¹5/99.
added 28.01.08 01:20:54 | 
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