#Specification VMAC-1

VMAC v1 specification overview:

  • Full size quality two layer Raspberry Pi Hat board to HAT mechanical specification
    • Suitable for Raspberry PI 2, 3 or Zero  Models  Raspberry Family
  • Size 85mm x 56mm
  • Weight: PCB with connectors 40g, PCB without connectors 20g
  • Standard 40 pin Pi GPIO header
  • All logic I/O levels are at 3v3
  • Impedance Video 75 Ohms and Audio 600 Ohms (Line Level)
  • Video input Clamp, Bias and Programmable Gain
  • 7 x AV Inputs
    • 6 x RCA Sockets – Component configurable for Video or Audio Inputs
    • 1 x 3.5mm Jack Socket providing 1 x video and 2 x audio Inputs
      • Used to loopback from Pi 2 or 3, 3.5mm Socket
  • 4 x AV Outputs
    • 4 x RCA Sockets – Component configurable for Video or Audio Outputs
  • Pi Zero video connector Pin Header
  • 4 x matrix logic control inputs
    • Connected to GPIO on Pi GPIO header
  • FET switched output
    • Connected via GPIO on Pi GPIO header
  • DC 6.5v to 27v input to 5v regulator
    • To power Pi via Pi GPIO header. Recommend a small heatsink on the regulator if using for long periods.
  • PiHat powered from Pi via Pi GPIO header 3v3
  • DTMF decoder
    • Logic outputs to GPIO on Pi GPIO header
  • EEPROM
    • Connected to E2 ID on Pi GPIO header
  • UART TXD, RXD and RTS
    • Connected to GPIO on Pi GPIO header
  • Two PiHat boards can be stacked for increased A/V IO
    • Require to unpopulate DTMF and E2 IC’s on 2nd board
    • Change matrix i2c address via solder jumper
  • Mounting holes
    • Suitable for Raspberry PI 2, 3 or Zero risers
  • Operating Temperature -40°C to 85°C