FM Transmitter & Receiver Modules

DS-070-9

A0

A1

A2

A3

GND

DATA

LED

Vcc

1

2

3

4

5

6

7

8

RF600E

3.3V

Ante nna

1

2

3

6

5

4

3.3V

Vcc

GND

GND

RTFQ1-XXX

EN

IN

ANT

SW1-4

Transmitter Circuit

2K2

10K

BC848

FM -RRFQ1

Receiver Circuit

1 2 3

11

15

7

5

7

9

4

3

RF600D

17

14

13

12

11

10

2

1

18

OP3

OP4

GND

ECLK

IN

OP1

Vcc

Sleep

LKIN

SD1

LRN

OP2

LB

Vcc

1K



1K



Le a rn

Sw itch

Option

Link

Se ria l Da ta

Output

Vcc

O/P 1

O/P 2

O/P 3

O/P 4

Tra nsm itte r

Low Ba tte ry

Sta tus

LED

22K



L

M

15K



Vcc

Prototyping Hints

It is essential when building any Low Power Radio System that you have a ‘clean’ DC power

source. Typically the ripple voltage should be less than 10mV Peak to Peak. Normally a 470uF

decoupling capacitor is sufficient de-coupling for an AC derived DC power source. Small capacitors

of 10-100nF can also be used across the power supply to filter high frequency noise.

Never place a Transmitter or Receiver directly into Vero-Board or any similar prototyping board.

This will

severely restrict the range. Rather, use small lengths of wire from the prototyping

board to the pins of the Transmitter or Receiver.

A useful antenna, for testing purposes, for both the Transmitter and Receiver on 433MHz is to

use a piece of wire 17.3cm long (23.8cm at 315MHz) soldered directly to the antenna pin.

Data should be encoded before it is transmitted over a wireless link to ensure reliability and

reduce the effect of interference and cross talk. A range of encoders IC’s are available from RF

Solutions, please refer to the RF Solutions website for further information.

Typical Application

The following circuits show a remote control system with ‘self learning feature’. Please refer

to datasheet DS600 for more information.

Transmitter Circuit

Receiver Circuit