Difference between revisions of "Change: Interface PCB"
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| − | *Board B will have all the connectors installed in a bulkhead configuration. | + | *Board B will have all the connectors installed in a bulkhead configuration. It will connect to Board A by directly plugging into a header on Board A or connect via a ribbon cable. |
Revision as of 03:53, 11 December 2015
Background
A Printed Circuit Board (PCB) has been designed and manufactured. The goals were to
- make it quicker and easier to build a system and to make it more reliable,
- to establish a relationship with a board house and
- to test the footprint of the RJ connectors and mating with the Pi
- to select an opensource pcb layout package and learn how to use it.
This is an interim solution - a step towards the goal of a complete turnkey system. �
- All sensor plug in.
- 12 VDC power supply with battery voltage monitoring
Problems
- ADC is only one channel.
- No Real Time Clock (RTC).
- Board does not meet Pi HAT specification.
- Board is not general purpose but limited to our use.
Proposed change
Split this board in two, Board A and Board B.
- Board A will be a general purpose interface board that meets the Pi HAT specifications and contains:
- at least one 4 channel ADC so each load cell will be individually measured instead of being summed.
- Real Time Clock with battery backup.
- Configuration ROM
- Power supply
- Board B will have all the connectors installed in a bulkhead configuration. It will connect to Board A by directly plugging into a header on Board A or connect via a ribbon cable.
