Difference between revisions of "Change: Interface PCB"
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[[File:P1010016c.jpg|thumb|400px|Dev Kit PCB installed on a Pi 2.]] | [[File:P1010016c.jpg|thumb|400px|Dev Kit PCB installed on a Pi 2.]] | ||
==Background== | ==Background== | ||
| − | A Printed Circuit Board (PCB) has been designed and manufactured. | + | A Printed Circuit Board (PCB) has been designed and manufactured. The goals were to |
| − | The goals were to | + | |
#make it quicker and easier to build a system and to make it more reliable, | #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 establish a relationship with a board house and | ||
#to test the footprint of the RJ connectors and mating with the Pi | #to test the footprint of the RJ connectors and mating with the Pi | ||
| − | #to select | + | #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. | This is an interim solution - a step towards the goal of a complete turnkey system. | ||
| − | + | � | |
*All sensor plug in. | *All sensor plug in. | ||
*12 VDC power supply with battery voltage monitoring | *12 VDC power supply with battery voltage monitoring | ||
Revision as of 04:51, 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.
