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The schematic of the board is available in PDF format. Prin in A3 for best resolution.

Carte SVXLink Card Edition 2015 Edition 1.0Carte SVXLink Card Edition 2015 Edition 1.0

Plan de perçage PDF

Plan de perçage DXF

Plan de perçage format A4

Parts List catalog

Quantity Component Value
2 C1,C3 220µF électrolytiques 16V
1 C2 100nF tantale
8 C4,C5,C6,C7,C8,C9,C10,C11 10µF céramique
11 C12,C13,C14,C15,C16,C18,C19,C20,C21,C22,C23 0,1µF tantale
1 C17 1µF tantale
2 D1,D2 1N5820
2 D3,D4 LED rouge
6 D5,D6,D13,D14,D15,D16 LED verte
2 D7,D8 10BQ015 (CMS) ou 1N5819
4 D9,D10,D11,D12 1N4148
2 IC1,IC8 ULN2003
1 IC2 DS18B20
2 IC3,IC6 CNY74-4
1 IC4 MAX3232
1 IC5 MAX6369
1 IC7 MCP3204
1 J1 Connecteur 40 Raspberry Pi B+/2B
4 J4,J8,J12,J14 Jack 3,5mm
3 J2,J6,J10 RJ 12 : TX RPTER, RX RPTER, LINK
1 J16 Connecteur-DC-2.1mm
4 K1,K2,K3,K4 RT314A12
1 L1 330 µH - 1 A
12 R1,R2,R3,R4,R5,R6,R7,R8,R41,R42,R43,R44 470 1/4W
4 R9,R11,R13,R16 1K 1/4W
4 R33,R34,R35,R36 220 Ohms 1/4W (pour entrées sous 5V)
7 R10,R12,R22,R37,R38,R39,R40 10K 1/4W
2 R14,R17 1K potentiomètre linéaire
2 R15,R18 10K potentiomètre linéaire
3 R19,R20,R21 4,7K 1/4W
2 R23,R24 10 1/4W
8 R25,R26,R27,R28,R29,R30,R31,R32 0K 1/4W
4 Tr1,Tr2,Tr3,Tr4 ETAL P1200
1 X1 LM2575T-5
1 X2 KIM-055L
4 DIVERS Entretoises 10mm M3 femelle/femelle + vis M3
1 DIVERS Connecteurs SECABLE HE14 pas de 2,54mm droite 1×36

Step by step Assembly description

1. The Power supply assy

Power supply with module KIM-055L

The components list to be installed :

  • Connector DC 2,1mm J16 or J17 Screw terminal.
  • Diode D1 1N5820 C1 and
  • C3 capacitor 220μF 16V

Test of the 5V output voltage

2. PTT / SQUELCH assy

PTT/SQUELCH assemby section

The components list to be installed:

  • IC8 ULN2003
  • IC3 CNY74-4
  • R1 à R8 470 Ω
  • R9, R11 1 kΩ
  • R10, R12 10 kΩ
  • D3, D4 Led red 3mm (with + on resistor side, the longer leg)
  • D5, D6 Led green 3mm (with + on resistor side, the longer leg)
  • D7, D8 Diodes 10BQ015

3. AUDIO IN/OUT assy

The components list to be installed:

  • C4 à C11 Capacitor 10μF
  • R13 et R16 1 kΩ
  • R14 et R17 Potentiometer 1 kΩ
  • R15 et R18 Potentiometer 10 kΩ
  • J4,J8,J12,J14 Connector jack 3,5mm (It is possible to install PIN to solder J5,J9,J13,J15). It is required to file or grind the 4 rear connections on the SVXLink Card version 1.0.
  • TR1 à TR4 Isolation Transformer ETAL P1200 (There is a possible alternative see above picture).
  • J2,J6,J10 Connector RJ12 or PINs to solder
Mistake in pin description on Board

THE ASSEMBLY IS TERMINATED FOR THE MINIMUM VERSION OF THE CARD. NOW WE ARE GOING TO START THE OPTIONAL PARTS. QR:THE CONNECTOR 2 × 20 pins OF THE RASPBERRY PI WILL BE WELD IN THE LAST TIME. IF YOU USE ONLY THE RELAY VERSION WITHOUT LINK, THIS PART MAY BE NOT WELDED.

4. OPTO INPUTS assy

The components list to be installed:

  • R33 à R36 220 Ω (This value can be changed according to the input voltage. Here it's for 5V)
  • J26 connector 2×5 pins
  • IC6 CNY74-4
  • R37 to R40 10 kΩ

5. WATCHDOG assy

Watchdog détails

The components list to be installed:

  • IC5 MAX6369
  • C14 Capacitor 0,1μF
  • PIN 2×1 Weld the 2 connectors. One is useful to activate the Watchdog and the other (RUN) to connect the RUN or P6 connector of release (Reset) of the Raspberry Pi. SET0 SET1 SET2 are jumpers (solder) to determine the time before reset if it does not send a signal.

A Watchdog “MAX6369” is a standalone CI. If the component does not receive a voltage pulse (System crash) in a defined period, it will reset the system.

Datasheet:MAX6369-MAX6374.pdf

As boot starting time exceeds 10 seconds, it is recommended to set the detection time (timeout) at maximum. As indicated in the above table, the 3 jumpers SET0, SET1 and SET2 needs to be closed (Weld the three pairs of squares).

6. Connector I2C assy

The installation is just prolonging the I2C connections that are on the Raspberry Pi.

7. The 1 WIRE assy

The components list to be installed:

  • J20 and J21 Installation 2 connectors pin 3×1, for 1WIRE externals sensors.
  • IC2 DS18B20 temperature sensor
  • R21 4,7 kΩ resistor

Here an overall picture at this level of assembly.

8. Output on Relay assy

The components list to be installed:

  • IC1 ULN2003
  • D13 à D16 green diode 3mm, (with + on resistor opposite side, the longer leg)
  • R41 à R44 470 Ω resistors
  • D9 à D12 diodes 1N4148
  • K1 à K4 relay 12V/16A
  • J28 à J31 Terminal with 3 blocks Screw

9. Analogic/Digital converter assy

The components list to be installed:

  • IC7 MCP3204 R23 to R24 10 Ω resistors
  • C15 to C18 0,1 µF
  • the resistors R25 to R32 (bridge voltage divider), will be determined depending on the voltage to be measured.
  • It remains the connector Pin J25 5×1 and the connector Pin 2×1 for the jumper JP13 used to connect the grounds Card/measures if necessary.

10. RS232 Port assy

The components list to be installed:

  • IC4 MAX3232
  • C19 à C23 capacitor 0,1µF
  • Connector PIN 3×1 will be used to connect RXD,TXD,GNG on a DB9 connector for example.

11. Connector Raspberry Pi assy

The components list to be installed:

  • Connector 40 pins female

The Raspberry Pi is fixed on the card with 4 spacers 10mm and 8 screws M3, this is a temporary assembly because you'll have to add spacers to secure definitively the card in a box.

12. Final result of assy

13. GPIO used on the Raspberry Pi