Finishing off DIYPNP, couple questions (alternator voltage regularion, sequental inj.
#21
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I have now assembled the voltage regulator circuit, but would like to test it. I have access to adjustable power supply at school.
Do i just connect ground to power supplys negative and 12v to power supplys positive, start from 12v and go up to 14.4 where it should go to zero? 500mA should be enough?
Also, i downloaded the latest ms2extra 3.3.0 firmware onto unit, and followed by uploading the basemap but its showing all these erroes. Is is normal? my usb->serial adapter is working, tunerstudio was able to detect the firmware on my unit.
https://i.imgur.com/joGI56o.png
https://i.imgur.com/9piCys6.png
Do i just connect ground to power supplys negative and 12v to power supplys positive, start from 12v and go up to 14.4 where it should go to zero? 500mA should be enough?
Also, i downloaded the latest ms2extra 3.3.0 firmware onto unit, and followed by uploading the basemap but its showing all these erroes. Is is normal? my usb->serial adapter is working, tunerstudio was able to detect the firmware on my unit.
https://i.imgur.com/joGI56o.png
https://i.imgur.com/9piCys6.png
#24
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Tested the voltage regulation circuit at school today, with mixed results.
https://i.imgur.com/BdHAehU.jpg
Here is my connection, i set it to 500mA and 12v DC. Couple times it cut the voltage on "field out" at ~15.2v but the multimeter didint give me a voltage.
Ones it cut at ~14.4v and after that it refused to cut the voltage. I went up to 17v without results.
I have double-triple checked everything, all components should be in right places and i dont have shorts.
My local eletronics store didint have PN2907A, insted i used 2N2905A transistors. Could this be the problem?
Here is a closer look to my circuit
https://i.imgur.com/wkJcTbw.jpg
https://i.imgur.com/6HEwn4T.jpg
Looks chaotic, but nothing is actually touching and shorting out.
12v and gnd was too hard to jump, so i modified the circuit a bit
https://i.imgur.com/9Uf6rr9.jpg
It should still work the same..?
https://i.imgur.com/BdHAehU.jpg
Here is my connection, i set it to 500mA and 12v DC. Couple times it cut the voltage on "field out" at ~15.2v but the multimeter didint give me a voltage.
Ones it cut at ~14.4v and after that it refused to cut the voltage. I went up to 17v without results.
I have double-triple checked everything, all components should be in right places and i dont have shorts.
My local eletronics store didint have PN2907A, insted i used 2N2905A transistors. Could this be the problem?
Here is a closer look to my circuit
https://i.imgur.com/wkJcTbw.jpg
https://i.imgur.com/6HEwn4T.jpg
Looks chaotic, but nothing is actually touching and shorting out.
12v and gnd was too hard to jump, so i modified the circuit a bit
https://i.imgur.com/9Uf6rr9.jpg
It should still work the same..?
#28
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Bought my components off a local store, but didint actually get the regulator to work. Ordered one off westfield, works great.
Alternator pcb | Frank's Westfield MX5 Alternator pcb |
Alternator pcb | Frank's Westfield MX5 Alternator pcb |
#33
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Sorry if it feels like i'm bringing this thread back from the dead.
Where did ya'll get the components to build the alternator control circuit? Any website you have good luck with? I tried Radioshack (really the only place in town) but they didn't have a bunch of the parts.
Thanks
Where did ya'll get the components to build the alternator control circuit? Any website you have good luck with? I tried Radioshack (really the only place in town) but they didn't have a bunch of the parts.
Thanks
![rofl](https://www.miataturbo.net/images/smilies/rofl1.gif)
New alternator too much? used ones are really el cheapo.
#36
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This is heresy but I just put a 97 or back alternator with a built in regulator made of much stouter stuff than whatever you can solder to that board. In over half a million miles of miata driving (wife, son and my miatas) never had a regulator go out yet. Bearings, well, not so good ![rofl](https://www.miataturbo.net/images/smilies/rofl1.gif)
New alternator too much? used ones are really el cheapo.
![rofl](https://www.miataturbo.net/images/smilies/rofl1.gif)
New alternator too much? used ones are really el cheapo.
Measure yours some time.
#38
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Thank you for posting this. I was able to follow the traces and map out the circuit using DIY's photo, but liked to see how it was laid out on the proto area. I know this is probably a super noob question, but the DIY sequential board has holes INJ3 and INJ4 to go right to the connector board, but I see that you wire yours into the 3 and 4 right there on the proto area. How do you get that back to the 4V and 4X on the connector board?
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