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UVic Formula Hybrid Documentation Project Management
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ETB Driver Socket and Case #20

Closed chadjmccolm closed 6 years ago

chadjmccolm commented 6 years ago

Context

The socket for the ETB driver is missing the required ground pins. Without those pins, the ETB driver will not run (as the ground on the logic side jumps to 3V and it needs 3.3V minimum between ground and power (5V)) to manage the power to the motor.

The current solution is to remove the ETB driver from the case and jump the grounds directly to ground. This is not a permanent solution. The shield that attaches to the connector should be revised to include the grounds.

The case itself has been damaged. The screws that hold it together have stripped their housings and the top is no longer secured. This case will have to be remade. This may be a good opportunity to change the connector too if the designer so desires.

Additional info can be found in the engine review doc here.

Outcomes

The outcomes for the project are the following:

Constraints

Related Issues

Related issues include:

chadjmccolm commented 6 years ago

To reduce the workload I would like to solder a jumper wire from the grounds we need onto the pins on the board just to add the grounds to the connector. Then the case will need to be rebuilt. A wooden case could be laser cut or a plastic case could be printed.

chadjmccolm commented 6 years ago

A plastic case will be produced at the same time as the #23 case. This case will be designed for splashproofing and running in the rain.

chadjmccolm commented 6 years ago

The learning from the old case is that printing threads does not work. We should probably print a hole big enough for a bolt to go all the way though and a pocket at the other end to hold the nut or use a glued threaded insert.

chadjmccolm commented 6 years ago

Looks like the existing PCB may be functional and I just misinterpreted it. It was designed with a ground plane that connects all the ground pins to the unused pins on the connector. This needs to be wired in with that assumption to make sure it works.

The case needs to be redone regardless.

chadjmccolm commented 6 years ago

Combined to #30