NAW_OEM v SLC_OEM

[Noddle]

Hi, Alan

Currently I'm running a NAW_OEM, I was wondering if there is any benefits to upgrade this to a SLC_OEM

Nigel

[admin]

SLC OEM does not have the 5v regulator onboard, so it is only for integration into electronic designs. SLC OEM has more voltage protection on the ports against ESD damage, SLC OEM also runs a newer firmware which greatly reduces the operating temperature of the mosfet.

[Molak]

I dont see the point of getting a slc_oem, for 25 bucks more you can have a SLC_DIY. Which is far superior in terms of features: EGT, boost , 7 0-5v channels, rpm pickup, 4 digit display, Usb connectivity. 

If you compare SLC_oem to NAW_oem, you dont have narrowband emulation or led display.

[admin]

SLC_OEM and NAW_OEM was never really meant for the end customer to function as a standalone wideband controller. It is a specialty product for integration into devices such as ECUs where small size is desirable.

Other companies have similar modules but much larger, prices on them are in the $200+ range.

Regards,

Alan To

[Noddle]

I was thinking about intergrating it into my Megasquirt

Nigel

[DonTZ125]

Agree with Noddle, disagree with Molak - I don't WANT a display, USB, RPM or EGT. I don't want another kit to assemble, or another case to seal up and find a home for somewhere on the bike. I want a teeny little set-and-forget card I can tuck into my MS case, to be fed and loved by the motherboard... 

I'm still slowly getting my act together, but I've been lurking here for a while. I was disappointed when the NAW_OEM was superceded by the (to me) less-suitable NAW_7S. At first glance, the SLC_OEM is even MORE suitable than the NAW_OEM!

[Stu_D]

I think the idea of the OEM range is brilliant, I have Megasquirt and a JAW 1.03 mounted in separate boxes, and thought while building the JAW "it would be great to get these in the same box" Now you can. I do think having to option to connect a display is useful though.
 
I have even started working on a PCB design that i will be able to plug a Microsquirt module and SLC_OEM "daughter cards" in to for my next project so i am keen to find out when it will be released.

Alan, is there any update on when SLC_OEM will be available?

[admin]

Target is date is end of june. You guys can email me and I will send out a sample.

[Noddle]

email sent.

Nigel

[BenGTT]

Hello Alan,

Did you receive my e-mail too?

Or maybe you need more infomation about my project before selling a sample?

Thanks

Benjamin

[DonTZ125]

I will definitely be buying a pair (dual WB) in the medium future, but at the rate life is going I won't be set up in time to be a tester. 

[DonTZ125]

Not sure where else to post this; there really isn't a topic for the SLC OEM.

I have in mind a custom adapter card for the MSII/Extra system, and I will be needing dual WBO2 sensors for this project. To this end I plan on installing the SLC-OEM cards right on the daughter card itself, inside the MS box, with the LSU plugs being part of the overall harness.

Obviously, there will be lots of pins and leads going to this box - I'm thinking 2x 35-pin AMPSeal units!

[admin]

I am making a carrier board for the SLC. It will be part of an SLC OEM eval kit I am putting together,



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One of the things that is not apparent is that the connections to the outside world should be protected with something similar to a TVS diode. In the pic IC2 is a NUP4201MR6T1G, 4 line TVS array. Protect Ip_Red, Vgnd_yellow at the very lest, Ri_black and Ia_green would benefit form protection.

With out the TVS, the only protection is the current limit resistors on SLC OEM, they range from 30 ohms to 1k ohms.

You have to be careful to pick a TVS with low capacitance, and very small leakage current. I would preferred to use discrete TH TVS stuff but I have not found anything that is both low cap and low leakage.

[DonTZ125]

As the saying goes, "That is information you need!" 

Interestingly, the NUP4201MR6T1G chip you suggest is back-ordered with both Mouser and Digikey until September! 

One question on the SLC ground - you have two of them, P2 & P3, side by each. I assume one is for the controller card itself, the other is for the heater 12v. Should they be grounded at different points, or at very least run back in different wires to the grounding point?


Edited to correct ground pin #s

[admin]

Yeah the IC is out of stock everywhere. I chose a few months ago before the supply shortage. You can substitute with something of similar specs.

P2 is the ground for the electronics, ~50ma. P3 is the ground for the sensor heater, ~1-3A. You can tie both pins together externally, but I suggest you tie P2 close to the ground of the device using the linear output, and tie P3 to ground separately. Just use a multimeter and look for offsets on the linear voltage output vs where you ground P2 and P3. If you use really thick gauge wires and thick pcb traces, then grounding will not be an issue.