6 Channel Relay Driver Card

Features

• Drives Ultimate relay-switched LPF kit
  • Open collector to turn off relay
  • Drives low to turn on relay
  • Only turn on one output at a time
• Inputs
  • 6 channels (5 used)
  • Active-high in to drive relay to on state
  • 3.3K to transistor base
    • 1 mA for 3.3V drive
    • 1.5 mA for 5V drive
• Outputs
  • Open Collector outputs from 2N3904 NPN transistors
• Power
  • 9-14V power in
  • 5V power out to power relays
  • DC jack
• 36x37mm card
  • 3 PCBs for $11 from OshPark

Ultimate Relay Card

• Ultimate relay-switched LPF kit
  • Ultimate relay-switched LPF kit Build Instructions
• Takes five QRP Labs Bandpass Filters

• Jumpers

Connectors

J1 - Input Connector

1. N/C
2. IN1
3. IN2
4. IN3
5. IN4
6. IN5
7. IN6
8. GND

J2 - Output Connector

1. GND
2. OUT6
3. OUT5
4. OUT4
5. OUT3
6. OUT2
7. OUT1
8. 5V OUT

Power Connector

• Center positive

CAD