vems 3.7 board vr/vr setup
need changing over to vr/hall
engine BMW m50b25tu
- primary trigger=VR 60-2 crank
- R30=18k (but 10k or 27k should also work). You probably do NOT want to change anything around primtrig, since primtrig=VR already (1k would be too strong anyway)
- secondary trigger=HALL sensor on cam
- Changing to HALL should be simple, see GenBoard/Manual/InputTriggerHardWareSectrigHall
bottom view
https://drive.google.com/open?id=1eMa0XuRHrnh7cIYlCcI1ERID85F0nHxQ
top view
https://drive.google.com/open?id=1HEHAyxgnL-CFirkSctx10CqGjVuHbLED
- I understand that the sj7 which is closed need to be opened
- yes, unsolder
Also: apply the short according to small slanted line
My image looks diff at this point:
https://drive.google.com/open?id=1WQ8ZMNXJSmv1sGjeOYzjHtMW9af0N-gW
- Of course different, because configured for VR
- the manually SOLDERED 2k7 (2701) resistor must be removed ( on your pic: at 4 hours from the southern end of hotmelt)
- R48 must be installed (input signal pullup: 2k7..4k7)
- some hotmelt seems to be over the most convenient place for sectrig input pullup, remove hotmelt before soldering
- soldering the removed "2701" 2k7 could work if not damaged, but the rescuekit (small bag included with devices) should have new resistors
About the other 5 holes:
- there is a wire attached at another point on the board redwire on the bottom view
- do i just disconnect it ?
- goes toward LM1815 pin3, should not matter. I would leave that, do the other mods, and test that way (remove if necessary, or cut+insulate or cut both ends, but it should not matter).
First input tests:
- input disconnected: DC voltage measured >3.7V
- 1k between input and GND (instead of HALL sensor), DC voltage should measure: between 0.5V and 1.5V
Than verify in InputTrigger/TriggerLog