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iscumd / IGVC2016

Repository for IGVC 2016 team
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Come up with entire wiring schematic #5

Open mikebowyer opened 8 years ago

CrisAdam commented 8 years ago

What are the requirements of the wiring schematic? i.e. I assume bulldog e-stop, physical red button, but I think there is merit in spelling them out (and yes, I realize you are probably just playing around with github, ideally all the necessary specifications would be available though for someone to come in and do it)

mikebowyer commented 8 years ago

Incorporate all components we plan to use. Have safety light which can be switched from flashing to solid, physical and wireless emergency stop. Ground breaker, motor controller power and fuses. All switches. On Feb 26, 2016 9:20 AM, "CrisAdam" notifications@github.com wrote:

What are the requirements of the wiring schematic?

— Reply to this email directly or view it on GitHub https://github.com/iscumd/IGVC2016/issues/5#issuecomment-189299170.

CrisAdam commented 8 years ago

how should the safety light switching happen - laptop control? tied to e-stop? manual switch to choose mode?

mikebowyer commented 8 years ago

It had to be computer controlled, when we start autonomous mode it needs to automatically cause the light to flash. The light we have is powered off 12, there is a wire on the light which when floats allows the light to flash, when connected to 12v the light is solid.

Last year this was done using the computer to connect to an arduino over serial, and the arduino controlled a relay which switched this wire to 12.

All the best, Mike Bowyer

Sent from my smart phone. Please excuse my brevity. On Feb 26, 2016 11:32 AM, "CrisAdam" notifications@github.com wrote:

how should the safety light switching happen - laptop control? tied to e-stop? manual switch to choose mode?

— Reply to this email directly or view it on GitHub https://github.com/iscumd/IGVC2016/issues/5#issuecomment-189360125.

CrisAdam commented 8 years ago

I think we are talking about the same light as on Argon - there wasn't a need to use a solenoid at 12v IIRC, the light had an "input" wire that would make it flash when powered at 5v (thus no relay needed, Arduino can drive it directly)

mikebowyer commented 8 years ago

It very well could be, I never studied the specification. If so then you're right the arduino should suffice. On Feb 26, 2016 12:19 PM, "CrisAdam" notifications@github.com wrote:

I think we are talking about the same light as on Argon - there wasn't a need to use a solenoid at 12v IIRC, the light had an "input" wire that would make it flash when powered at 5v (thus no relay needed, Arduino can drive it directly)

— Reply to this email directly or view it on GitHub https://github.com/iscumd/IGVC2016/issues/5#issuecomment-189379325.

CrisAdam commented 8 years ago

I don't remember ever finding/seeing a specification for it, but I tested and could control the blinking/not blinking with 5v for Argon - I would suggest we test it (hence the "needs testing" label)

mikebowyer commented 8 years ago

I would like to see a specification before making a final decision on it, but if it takes 3.3V then that's great and the E-stop box will be far less messy :)

All the best, Mike Bowyer Phone: (248)-935-3099 B.S.E. Electrical & Computer Engineering, UM-Dearborn http://www.umdearborn.edu/, 2017 President, Intelligent Systems Club, ISC-UMD http://www.iscumd.com/ Intelligent Ground Vehicle Competition Captain, ​​ http://www.iscumd.com/IGVC http://www.igvc.org/ Vice President, Eta Kappa Nu, Theta Tau Member, Tau Beta Pi - Michigan Iota http://www-personal.engin.umd.umich.edu/~tbp/

On Mon, Feb 29, 2016 at 2:09 PM, CrisAdam notifications@github.com wrote:

I don't remember ever finding/seeing a specification for it, but I tested and could control the blinking/not blinking with 5v for Argon - I would suggest we test it (hence the "needs testing" label)

— Reply to this email directly or view it on GitHub https://github.com/iscumd/IGVC2016/issues/5#issuecomment-190338356.

CrisAdam commented 8 years ago

Err.. by testing I meant "exploratory testing" - connecting the light to the arduino (or some other 5v source) and seeing if it works or not - nothing final about it, just exploring our options to see if it works or not (I don't see it as destructive, as applying 5v instead of 12v shouldn't break things) - also, we can test with 3.3 as well, not sure if it still holds true at that voltage (are we looking at a 3.3v arduino? or RPi?)