Alternator Control box for standalone MS install for NB
#26
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
The circuit doesn't need (more) testing, it's been used in four places.
I'm wondering what wire to put it on. But everything I can see, it looks like you want to put it on the wire I'm not using. I remember being confused at the time, since I had it on the other wire and it didn't work. When I put it on the gray/red wire, BAM, things were working. Maybe the wire colors are wrong in my book. Or... I dunno. I should check which ECU pin corresponds to the wire I'm using. Everyone PM teamplur and make him make me do it.
I'm wondering what wire to put it on. But everything I can see, it looks like you want to put it on the wire I'm not using. I remember being confused at the time, since I had it on the other wire and it didn't work. When I put it on the gray/red wire, BAM, things were working. Maybe the wire colors are wrong in my book. Or... I dunno. I should check which ECU pin corresponds to the wire I'm using. Everyone PM teamplur and make him make me do it.
#29
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Yes, I'm pretty sure that would be the issue - I was going to check it on my car, but it's nice to have someone else verify it. I'll hopefully do that tonight. Sucks, though, since there's more vias now on my board. :-) But I'll take a board with more vias that works over one that doesn't work at all.
#33
Elite Member
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (10)
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,977
Total Cats: 356
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
It seems I have a strange issue (apart from being a spelling **** apparently). The NAPA alternator control box works as long as the stock ECU is in place: I feed B+ to the blue wire, and I get PWM on the green wire (note that the green wire in not connected to anything). I remove the stock ECU, start the car with the MS2 (standalone) and I get nothing on the green wire (voltage is at ~11.5V on the blue wire). What gives?
Jim
Jim
#35
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Jason, thx for an other great circuit.
I reordered the components a bit so they fit in the proto area, pretty neat if I say so myself. On the bottom right side of the layout, you'll notice 2 unused spaces. This corresponds with the 2 missing holes in the proto area.
As the circuit only uses 50% of the proto area, there's room enough for other stuff like EBC, Vics and Fan mods.
There's probably not enough room to fit Abe's input circuits, but I built those in the VR area of the board.
I reordered the components a bit so they fit in the proto area, pretty neat if I say so myself. On the bottom right side of the layout, you'll notice 2 unused spaces. This corresponds with the 2 missing holes in the proto area.
As the circuit only uses 50% of the proto area, there's room enough for other stuff like EBC, Vics and Fan mods.
There's probably not enough room to fit Abe's input circuits, but I built those in the VR area of the board.
Last edited by WestfieldMX5; 02-05-2009 at 12:44 PM.
#36
2 Props,3 Dildos,& 1 Cat
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/smod.png)
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 573
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
re-installed the circuit today and it holds system voltage nicely just under 15V. if I switch on everything (heads, fogs, defrost, heater fan full, hold brake, and hold both window switches) it maintains about 14V. probably less if the fans come on. all at idle. I guess my alt is ok?
#38
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Interested to see the schematic Jason.
BTW, is it necessary to use the 2% version of the TL431? Datasheet says 'guaranteed thermal stability over applicable temperature ranges'. Local shop dude looked at me like a cow to an airplane when I asked for a 2% version.
Also, I assume the 48K7 regulates current? I have little electrical stuff in my Westfield so I might need to lower current on my setup.
BTW, is it necessary to use the 2% version of the TL431? Datasheet says 'guaranteed thermal stability over applicable temperature ranges'. Local shop dude looked at me like a cow to an airplane when I asked for a 2% version.
Also, I assume the 48K7 regulates current? I have little electrical stuff in my Westfield so I might need to lower current on my setup.
Last edited by WestfieldMX5; 01-25-2009 at 07:38 AM.
#40
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I think the schematic is above?
Wow, that's a nice lay out, I like it - and all without resorting to unusual stacking methods. You know, with a couple of those posted, it might be possible to come up with a "standard" NB install.
Jason, thx for an other great circuit.
I reordered the components a bit so they fit in the proto area. Only 6x7 holes are used.
Of the 42 holes, only one remains unused (left from C2), pretty neat if I say so myself.
As the circuit only uses 50% of the proto area, there's room enough for other stuff like EBC, Vics and Fan mods.
There's probably not be enough room to fit Abe's input circuits, but I built those in the VR area of the board.
I reordered the components a bit so they fit in the proto area. Only 6x7 holes are used.
Of the 42 holes, only one remains unused (left from C2), pretty neat if I say so myself.
As the circuit only uses 50% of the proto area, there's room enough for other stuff like EBC, Vics and Fan mods.
There's probably not be enough room to fit Abe's input circuits, but I built those in the VR area of the board.