From parallel to standalone - what to change inside the MS?
#1
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Hi,
as I will be trying to go from parallel to standalone in the near future:
Waht will I have to change inside the MS (I got a 3.57 board so any input on a V3 board would be sufficient)?
I know I deleted the R7 (which I will have to put back in (pita with the SMD parts) - to get a correct temp reading.
Anything else?
Thanks for the advice.
Greets
as I will be trying to go from parallel to standalone in the near future:
Waht will I have to change inside the MS (I got a 3.57 board so any input on a V3 board would be sufficient)?
I know I deleted the R7 (which I will have to put back in (pita with the SMD parts) - to get a correct temp reading.
Anything else?
Thanks for the advice.
Greets
#4
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Join Date: Mar 2006
Location: Schwarzenberg, Germany
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That is the good thing on a 3.57 board - you don't need a mod for idle- the fidle output is strong enough to handle the ilde valve.
Yes I need a tacho mod, a fan output, alternator circuit.
Yes I need a tacho mod, a fan output, alternator circuit.
#8
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I'm using the middle led as tacho out (with some minor modifications to the board).
![](http://westfieldmx5.devocht.com/starnet/media/gallery/Megasquirt/D15.png)
As the V3.57 boards already have the 1K pullup, it's even easier.
Just connect R59 to 12V instead of VCC and Pad 2 will be your tacho out. The transistor is rated at 200mA, so should be more than adequate. As a precaution, it might be good to remove R25 or the LED.
I've never tested if 5V is enough to drive the tacho. Probably not, but if it is, you don't need to do anything but hook the tacho up to Pad 2.
![](http://westfieldmx5.devocht.com/starnet/media/gallery/Megasquirt/D15.png)
As the V3.57 boards already have the 1K pullup, it's even easier.
Just connect R59 to 12V instead of VCC and Pad 2 will be your tacho out. The transistor is rated at 200mA, so should be more than adequate. As a precaution, it might be good to remove R25 or the LED.
I've never tested if 5V is enough to drive the tacho. Probably not, but if it is, you don't need to do anything but hook the tacho up to Pad 2.
![](http://www.megamanual.com/357/V357_schenmatics7.gif)
Last edited by WestfieldMX5; 07-31-2009 at 04:43 AM.
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