Simple darlington transistor array.

• 8 transistors
• up to 50VDC
• up to 500mA/output
• Simple 1 port interface:
    8 inputs control the 8 outputs
• Output (2 screw terminal blocks/channel):
    controlled power out
    common VCC out
• Input power options:
    External voltage (2 pin connector)
    Voltage from motherboard (jumper)