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Help to choose right setup

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Arnis

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Post 13 Dec 2018, 11:22

Re: Help to choose right setup

I really dont get what is invert....
what should be inverted

Image
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STC

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Post 14 Dec 2018, 17:59

Re: Help to choose right setup

In your example nothing should be inverted. Only if your stepper motor will move in wrong direction, then you should set inversion for SM_DIR.
Note: you need to connect a pull down resistor between IE and ground. 1...5k resistor. In opposite case VT1 will not turn off.
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
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Arnis

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Post 17 Dec 2018, 15:30

Re: Help to choose right setup

What resistance should be for spark plug cables.
If I use cooper cable and cut my lenghts I need then I need spark plug caps with 1,2,3 or 5kom resistance? Or it dose not mather?
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STC

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Post 17 Dec 2018, 15:40

Re: Help to choose right setup

At least, either wires or spark plugs should have resistance. 5k is Ok.
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
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Arnis

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Post 15 Jan 2019, 17:26

Re: Help to choose right setup

hi,
today I managed to start the engine with secu!
engine works very nice !
there are some things to fix, but generally very happy!
1. tachometer is not reacting . circuit with diodes and resistor needs to find right resistor ( I guess..)or use Hall_out
2. when I turn on ignition secu wakes up. fuell pump starts for 5sec. crank engine and all works, but when I turn off ignition engine still runs! had to disconnect secu from ignition wire........ Strange.....Or Im doing something wrong ....
and I need signal for CE +12v. so if i add 47k resistor between 12v and ce output is it OK?
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STC

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Post 15 Jan 2019, 21:53

Re: Help to choose right setup

1. tachometer is not reacting . circuit with diodes and resistor needs to find right resistor ( I guess..)or use Hall_out

Yes

and I need signal for CE +12v. so if i add 47k resistor between 12v and ce output is it OK?

Yes, it will be ok.
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
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Arnis

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Post 16 Jan 2019, 15:39

Re: Help to choose right setup

Image
YOu mean like this.
Could not get it working right with diodes. I got free outputs so Ill try hall_out
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STC

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Post 16 Jan 2019, 16:53

Re: Help to choose right setup

Yes, you need that resistor, because IE is a high-side output and has no internal pull down resistor.
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
Клуб проекта в Facebook https://www.facebook.com/groups/secu3club
Клуб проекта ВКонтакте https://vk.com/secu3club (вступаем!)
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Arnis

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Posts: 45

Joined: 24 Feb 2018, 20:17

Location: Liepaja Latvija

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SECU version: DIY SECU-3T


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Post 16 Jan 2019, 20:44

Re: Help to choose right setup

Ok. I made circuit, but taho is 160 rpm secu 1200?
And ignition cable when i add small lamp to test if acc turns off it dose but without lamp dash gets acc off but engine runs
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STC

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Post 17 Jan 2019, 01:55

Re: Help to choose right setup

Try to change pulse width or set inversion check for that output.
Author of the SECU-3™ project http://SECU-3.org. An open source engine control unit / Ignition control system, (C) 2007.
Клуб проекта в Facebook https://www.facebook.com/groups/secu3club
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