RDS Encoder

Description
Schematic diagram
PCB layout

Parts list:

U1 - 78L05
U2 - PIC12C508 (programmed)
U3 - PIC16F84A-20 (programmed)
U4 - 24LC08B
U5 - 74HC03
U6 - TLC272
Q1 - BF245A
D1 - 1N4007
D2 - LED 3 mm
D3 - Zener diode 9 V, 0.5 W
Y1 - crystal 4.332 MHz
Y2 - crystal 16 MHz

C1 - 100 uF (electrolytic, 25 V)
C2, C3, C8, C9, C11, C13, C14 - 100 nF (ceramic)
C4, C5, C6, C7, C20, C24 - 27 pF (ceramic)
C10, C18 - 100 pF (ceramic)
C12, C19 - 1 uF (electrolytic, 50 V)
C15, C21, C25 - 100 uF (electrolytic, 10 V)
C16, C22 - 330 pF (ceramic)
C17 - 2.7 nF (ceramic)
C23 - 470 nF (plastic)

R1, R2, R5, R12, R14 - 2 k
R3, R4, R28 - 4.7 k
R6, R15, R17, R19, R20, R23, R27 - 10 k
R7 - 62 k
R8 - 33 k
R9 - 16 k
R10 - 8.2 k
R11 - 3.9 k
R13, R29 - 1 k
R16 - 18 k
R18, R26 - 15 k
R21 - trimmer 1 k
R22, R25 - 22 k
R24 - 47 k

D/A converter output waveform (on C11):

RDS encoder output spectrum:

Description
Schematic diagram
PCB layout

Parts list:

U1 - LM567
U2 - 74HC03
Q1 - BC547C
D1 - LED diode

C1 - 10 pF (ceramic)
C2, C3 - 100 pF (ceramic)
C4 - 330 pF (ceramic)
C5, C8 - 1 nF (ceramic)
C6 - 100 nF (ceramic)
C7 - 220 nF (ceramic)
C9 - 1 uF (electrolytic, 50 V)

R1 - trimmer 250 k
R2 - 1 M
R3 - 2.7 k
R4, R5 - trimmer 10 k
R6 - 12 k
R7, R11 - 2.2 k
R8, R9 - 10 k
R10 - 1.5 k

Description
Schematic diagram
PCB layout

Parts list:

U1 - PIC16F84 (programmed)
U2 - 78L05

R1 - 33k
R2 - 16k
R3 - 8k2
R4 - 3k9
R5 - 2k
R6 - 1k
R7 - 820R
R8, R9 - 4k7
R10 - trimmer 500R

C1 - 10n (ceramic)
C2 - 22n (plastic)
C3, C4 - 27p (ceramic)
C5, C6 - 100n (ceramic)

L1 - 330 uH (radial)

Y1 - crystal 4.332 MHz

RDS Encoder Module

Connection of the Parallel cable enclosed with the RDS Encoder Module (as optional accessories). It's provided by D-SUB male connector on computer side and DIN connector on RDS encoder side.

5-pin DIN connector
(At the RDS encoder from front side)

Mini RDS Encoder 3S

An example of the parallel cable to connect the 3S RDS encoder to PC. This can be provided by D-SUB male connector on computer side and JACK connector on RDS encoder side.

JACK connector

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