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Megasquirt VR circuit changes.

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Old 06-03-07, 11:32 AM
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Mad Man

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VR circuit changes.

I must have missed this before but in the FAQ it talks about changing a 59k resistor and .001 F cap to a 39k and .01 F cap. Is this still necessary on Error's board and a pre-built V3. I can't tell what schematic its showing as the pics aren't back up yet.
Old 06-03-07, 01:51 PM
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Mad Man

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I have another question. On the NE1- goes to pin 7 which from my RS harness goes to ground. From other pinnouts though it goes to the NE1- on the harness. Are these supposed to be connect to ground or the harness, harness I'm assuming. I guess how do I separate that on my prebuilt V3. Should I move it to a new pin?
Old 06-03-07, 08:24 PM
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Reading some more on the MS site it looks like you do want to connect to ground by pin 7. Is this right? Also for the 2nd VR circuit should I use pin 8 for the other NE-?
Old 06-04-07, 03:10 PM
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Can anyone help? I'm trying to get the box completely soldiered tonight so I can finish on the wiring harness.

thanks.
Old 06-04-07, 07:23 PM
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With the v3 board, you aren't going to use the VR conditioner on the error* board that required the changes... you'll only need ot use the lm1815 with the .01 cap and 82k resistor.

Ne+ should go to pin 24, NE- should go to any ground pin, G+ should go to the input for your lm1815 circuit, and G- should go to a ground nearby that on the error* board.

Ken
Old 06-06-07, 10:30 AM
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Would it be ok to run ne- and g- both to pin 7 or will this cause issues?
Old 06-06-07, 10:48 AM
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no, that should not be done... you should run the G ground to the lm1815 circuit.
Old 06-06-07, 11:11 AM
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Gotcha, will use one of the extra ouput pins for it to the daughter board.
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