Wiring up KOSO Digital Gauge - few questions

[posplayr]

Jim, if his gauges require a +12v input to operate the neutral and oil pressure lights, I suggested he use a relay (micro) by hooking up one of the 'switched' contacts to +12v (30) and the other to the new gauges (87). Then it's a simple matter to supply +12v to the pull down coil on one end (86) and the other end (85) is grounded by either the oil or neutral switch as necessary.

OK I get it; the neutral and oil switches are low side controls (i.e. they ground the switch when activated) and you need to supply +12V to the gauge under that condition.

So yes a relay can be used to invert the polarity; probably the easiest to do and any size really would work as the current levels are probably less than 1 amp.

I attached a pic to clarify for nikosg

Kinda a pain, on the SSPB I provide both polarities (jumper selectable) for a Switched ACC circuit so no external relays would be required.

something like this.

http://media.digikey.com/PDF/Data%20Sheets/Omron%20PDFs/G8HE.pdf

[nikosg]

Ok guys update time.

Well, i kind of had one of those f&*k it moments today... so i did what i thought was right and fired her up.

I joined the red wire to the orange at the ignition... and BOOM. IT WORKS!

I didnt use ANY micro relays - it just didnt make sense to me after scouring the web about these gauges and no one seemed to mention anything, so I just did what i thought the instructions told and everything worked

All the inbuilt lights work. Neutral, indicators, high beam, oil pressure.. all work!!! (big thanks rustybronco for helping me sort these connections)

Will see what sort of read i can get with the fuel gauge but so far everything is working well!!!

Thanks so much for all the input

Will post some pics in my build section soon!

[pete]

Only just checking in now, glad the guys got you sorted!

[posplayr]

seems like the work is done, but a quick search came up with Saltymonk's thread from a while back. Might be of some interest to pursue.

http://www.thegsresources.com/_forum/showthread.php?t=158707&highlight=KOSO

[nikosg]

Thanks posplayr!

Will keep the thread posted as i go. Hopefully I dont run into any issues, I'm already a bit confused reading saltymonks thread! :P

Nik

[rustybronco]

Looks like the two inputs in question can be used with either a +12v or earth input internally selected. That explains the dual voltages listed on the instruction sheet.

Gray (Oil pressure) - Green / Yellow (Looks like this one can be a + or - input to the Koso)