opened
naturesyouth
username_0
<a href="https://github.com/JSpringett"><img src="https://avatars3.githubusercontent.com/u/325530?v=4" align="left" width="96" height="96" hspace="10"></img></a> **Issue by [JSpringett](https://github.com/JSpringett)**
_Wednesday Nov 23, 2016 at 14:21 GMT_
_Originally opened as https://github.com/abersailbot/kitty-hardware/issues/7_

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What batteries? How many? How is the PI supplied? How is the rest of the system supplied?
Investigate power source
issue
created
naturesyouth
username_0
<a href="https://github.com/Danyc0"><img src="https://avatars2.githubusercontent.com/u/2716831?v=4" align="left" width="48" height="48" hspace="10"></img></a> **Comment by [Danyc0](https://github.com/Danyc0)**
_Wednesday Nov 23, 2016 at 21:00 GMT_

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The black batteries in kitty are 4*7.2v NiMh (but much higher capacity than those in Dewi, hence why they're so much heavier and slightly bigger). They're in series for the computers to run the RoWind at the right voltage, but in parallel for the servos to give them enough current capacity. (All recalled from 3 year old memories, so take with a pinch of salt)
comment
opened
naturesyouth
username_0
<a href="https://github.com/JSpringett"><img src="https://avatars3.githubusercontent.com/u/325530?v=4" align="left" width="96" height="96" hspace="10"></img></a> **Issue by [JSpringett](https://github.com/JSpringett)**
_Wednesday Nov 23, 2016 at 14:21 GMT_
_Originally opened as https://github.com/abersailbot/kitty-hardware/issues/7_

----

What batteries? How many? How is the PI supplied? How is the rest of the system supplied?
Investigate power source
issue
created
naturesyouth
username_0
<a href="https://github.com/JSpringett"><img src="https://avatars3.githubusercontent.com/u/325530?v=4" align="left" width="48" height="48" hspace="10"></img></a> **Comment by [JSpringett](https://github.com/JSpringett)**
_Wednesday Nov 23, 2016 at 21:02 GMT_

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Cheers Dan
comment
created
naturesyouth
username_0
<a href="https://github.com/Danyc0"><img src="https://avatars2.githubusercontent.com/u/2716831?v=4" align="left" width="48" height="48" hspace="10"></img></a> **Comment by [Danyc0](https://github.com/Danyc0)**
_Thursday Nov 24, 2016 at 01:12 GMT_

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It might be worth switching to having both sets in parallel and using a boost converter to get the voltage needed for the RoWind. This was originally discounted because of the inefficiencies in boost regulators as compared to buck regs, but now, thanks to us having a working PCB (Captain Morgan), it opens lots of doors with regards to very efficient boost regulators. This would allow us to better standardise electronics between the boats (with a Do Not Populate on the boost reg for boats which don't have a RoWind).
comment
created
naturesyouth
username_0
<a href="https://github.com/username_0"><img src="https://avatars2.githubusercontent.com/u/7346586?v=4" align="left" width="48" height="48" hspace="10"></img></a> **Comment by [username_0](https://github.com/username_0)**
_Thursday Nov 24, 2016 at 01:15 GMT_

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i would be tempted to populated it anyway, that way all the boats are spares for other boats, increasing the available redundancy while at a competition, it can always be disabled through software to save power.
comment
closed
naturesyouth
username_0
issue