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Old 04-09-2014, 11:14 AM   #871
Steigs
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Quote:
Originally Posted by craftycoder View Post
This is just a non issue from an arcing perspective.
Correct.

Movement of contacts, wire coming loose, frayed connection, etc. were more of my concern.

Just a small extra bit to add to the bullet-proof-ness.
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Old 04-09-2014, 11:19 AM   #872
DRONE
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Quote:
Originally Posted by craftycoder View Post
Separators could be added to the mold, no problem there.

We are talking 12V though. Look at this PCB from a Fluke 87V. It is a 1000V safe multimeter. They do not have double the creepage space I have yet they have 100 times the voltage. Use a ring terminal and the wires are not going to move.

On the PCB I've only got .016" space between 12V and ground. BTW, that is over 16 times the required distance by international convention. That international standard is 0.000984" (0.025mm) minimum spacing for 25V of potential. This is just a non issue from an arcing perspective.
When I'm doing electrical mods to my bike, I never seem to have the right-sized connector in my box of electrical stuff, and then when I go to Radio Shack or AutoZone they either don't have what I want, or they want me to buy way more than I need, or they only have what I need in an "assortment."

My suggestion is, when you get to the point of selling these things, buy a few thousand adhesive-lined heat shrink ring terminals in the correct sizes (which should not cost you much wholesale), then throw 10 of them in with each MotoBrain. Or whatever.

There will still be guys out there who will take bare wire and wrap it around a bolt then screw that into the block.
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Old 04-09-2014, 11:31 AM   #873
craftycoder OP
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Quote:
Originally Posted by Steigs View Post
Correct.

Movement of contacts, wire coming loose, frayed connection, etc. were more of my concern.

Just a small extra bit to add to the bullet-proof-ness.
It is easy to do and the added marginal cost is less than $0.25 for some little "walls" between the terminals. Something like this?

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Old 04-09-2014, 11:34 AM   #874
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There will still be guys out there who will take bare wire and wrap it around a bolt then screw that into the block.
I'm sure you are right. In other news, you sold the X-Country? I loved that bike!

I've got one myself. Motobrian equipped.
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Old 04-09-2014, 12:51 PM   #875
Steigs
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Originally Posted by craftycoder View Post
It is easy to do and the added marginal cost is less than $0.25 for some little "walls" between the terminals. Something like this?
Hard to tell from that angle how long that section is, but yeah. I think ideally you'd want the barrier to be maybe an 1/8" or so wider than the connectors it sits between. That way any stray connection has to angle out and then back in to make contact, making it harder to occur inadvertently.

For reference:
www.ictradenet.com/models_pic/38660-7805.jpg
http://www.camdenboss.com/media//cat...ry/CBS64_1.jpg

You'd have to work pretty hard to short those terminals together.

I would also isolate the mains as well, given that a short there could be catastrophic.
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Old 04-09-2014, 01:06 PM   #876
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I've actually moved the mains further apart from each other and farther from the the outputs in the next revision. I just got the quote back from that vendor 2 days ago actually. $2500 for 100 PCBs. It all adds up fast


Quote:
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I would also isolate the mains as well, given that a short there could be catastrophic.
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Old 04-09-2014, 01:13 PM   #877
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Depending on the epoxy, you may be able to do the barriers in the mold using epoxy. Then your cost is just for the extra epoxy, with no increase in production timing or added material to source. Might be a slight increase of material cost, but long term your overall cost will be lower because of the other two.

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Old 04-09-2014, 01:48 PM   #878
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Originally Posted by hizzo3 View Post
Depending on the epoxy, you may be able to do the barriers in the mold using epoxy. Then your cost is just for the extra epoxy, with no increase in production timing or added material to source. Might be a slight increase of material cost, but long term your overall cost will be lower because of the other two.

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That was the point I was trying to make. The resin is certainly stout enough for this duty.
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Old 04-09-2014, 03:24 PM   #879
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Mind if I ask what resin you're using? I have a few projects of my own and was thinking of plastidip or rtv(I know bad)

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Old 04-09-2014, 03:33 PM   #880
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Originally Posted by hizzo3 View Post
Mind if I ask what resin you're using? I have a few projects of my own and was thinking of plastidip or rtv(I know bad)

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I am using ResinLab EP1200AB
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Old 04-09-2014, 03:42 PM   #881
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Motobrain Update Video

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Old 04-10-2014, 05:59 AM   #882
Texcollect
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Love the update on KickStarter. Keep up the good work. This project went way beyond what I NEED, but it still ranks way higher on what I WANT
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Old 04-10-2014, 07:34 AM   #883
lmychajluk
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This thing is looking better and better. I can't say that I have a specific need for it right now, but now that I'll be getting a BT 4.0 phone (Galaxy S5), I think I may just buy one when they go into production just to give back for the enjoyment I've had of following this thread!
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Old 04-10-2014, 07:42 AM   #884
jpr
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Dude awesome progress!!

great skills you and your team have.
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Old 04-22-2014, 10:16 AM   #885
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I really want one, before the heart of the season rolls around
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