6x2 Antenna switch control

This revision is from 2016/12/20 22:38. You can Restore it.

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Front side

  • LCD - shows selected antenna - first line Input/Output 1, second line Input/Output 2
  • MENU - light button. For activate press button more than 0,5 second. Green light signals if manual control activate.
  • ENCODER - rotary encoder primary move cursor, after activate MENU you can select antenna outputs manual or back activate BCD inputs.

Rear side

  • DC POWER - input jack 5,5/2,1 mm size for DC power between 12-14 Volts. Same Power on pin8 ANT outputs.
  • ETHERNET - OPTIONAL module for controlled switch manual over simple web page.
  • microSD - not implemented.
  • BCD IN - band data inputs activate two levels, dependency to JP8 jumper
    • HIGH - TTL voltage input
    • LOW - grounded input (contains own 1k pull up resistor)
  • PTT TRX - grounded activate input PTT from transceiver (contains own 1k pull up resistor)
  • PTT PA - PTT continues from TRX to this output for power amplifier. If detect collision between inputs band, this output will be deactivate.
  • ANT - six outputs, will be in two levels dependency to preset JP1 and JP2 jumper. Also 12V DC power and ground available.
    • ULN if use internal driver ULN2803A - open collector 500 mA each outputs
    • UDN if use internal source 12V power driver UDN2580A.

Left side

  • From the left side is accessible USB mini connector from Arduino NANO, which is usable for upload new firmware.

Block diagram

Board preset

LCD contrast

  • with potentiometer RV1 - near left side LCD module

Inputs BCD Levels

  • JP8 to HIGH - activate BCD inputs with TTL signal level (1k ohm pull-down resistor).

  • JP8 to LOW - activate BCD inputs to ground (1k ohm pull up resistor).

Outputs Antenna switching

This jumper must be set dependency to used U4 and U7 IO chip - do not change before change chip!

ULN - for ULN2803A open collector driver - switching antenna relay with grounded outputs.

UDN - for UDN2580A source 12V power driver - switching antenna relay with 12V power outputs.

Cable connect

  • BCD IN - Input band data from TRX 1 or 2

  • Antenna outputs - Switched anntenas for TRX 1 or 2

  • PTT TRX - input PTT cinch from transceiver (grounding activate).
  • PTT PA - output PTT cinch to power amplifier - if controller detect collision, disconnect signal from transceiver PTT.
  • 12V - DC Power input (positive center) 12-14V. Same Power on pin8 ANT outputs.

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