spark4pi-* is a modular hardware platform for managed
instrument implementations controlled over Raspberry Pi
compatible 40 pin interface. The design is inspired by 
the Spark hardware platform for networking as form factor
but with a Raspberry Pi 40 pin connector as management
interface instead of 96boards.

The functionality of spark4pi-relay-actuator
is similar to the two-position relay
actuators of the classic HP 59306A but with 3 relays
instead of 6. The device falls into the IVI Switch instrument
class abstraction model.

The project includes the following components:
1. board - schematic and PCB design files for KiCAD
2. mechanical - technical documentation for production
 of a 1U 19 inch rack mountable ESD Acrylic box.
3. board-pi-bridge - design files for board that
 connects together a Pi compatible board with the instrument
 extension base board mounted to the left of the Pi compatible
 control board.
4. board-powermod - DC-DC board design used as a module to
 convert the 12-15V input power to 5V powering the
 Pi compatible control board.

The project is published by Lightside Instruments AS
under TAPR Open Hardware License. Read the LICENSE file
for details.