I love www.the12volt.com/ … great resource.
But I would always prefer a customised answer like @Devilclarke gave you.
This community is such a wealth of knowledge…
4 Likes
Don’t forget the diode on the pulse line to protect the xAC.
1 Like
Good im glad we could help.
Just to reiterate what amal is saying:
You will end up with 2 diodes;
-
the one shown in my image (courtesy of 12volt) is a flyback diode to stop damage to the relay and suppress emi created when the relay tuns off.
-
you will need to put one on the white wire feeding into the first relay.
2 Likes
Sounds like diodes are like fuses… no way that you can have too many.
1 Like
Yes, I mean no, well kinda 
The 2 diodes in this case provide 2 different forms of protection.
2 Likes
When you’re working with 12V systems, you can put diodes in all day. You get a diode, and you get a diode!
Not so much with 3.3V systems
3 Likes
Yeah .6fvd is significantly more of a percentage of 3.3v, one of the boards for work (a custom camera and laser driver solution) runs on 1.8v diodes start to be a bit problematic 
2 Likes
Putting this all together for ya @Steven1727.
You need to know 2 things to understand what’s being referenced.
First you actually lose about .7 volts when you pass through a diode. (The right way, the wrong way don’t work at all.)
Second, Engineers and Technicians will haggle back and forth over a half a volt in the same way and with the same passion that Historians and Military Officers will deconstruct, study, reconstruct and re-fight the Civil War. Seriously it gets intense.
Your motorcycle probably has;
9-10 volts while starting.
10.5 volts when battery dead and no load or charging
12.5 volts when fully charged with no load or charging.
13.5-14 volts while running and charging.
Don’t sweat that .7v 
2 Likes
I’m typically really good when it comes to car wiring… But these diodes are throwing a bone in the bucket I have never had to deal with lol. Thanks y’all. I’m even thinking about adding some LED diodes to show that The chip has been accepted and the system is armed. 
3 Likes
The coiled up wire with LED on your reader will come on while a chip is being read.
You can also remove that wire if you’re careful.
3 Likes
I wish it was only Satur9 bending my brain when I read through here.
1 Like
Very interested in how this turns out. I’d very much like my new bike to start keyless.
1 Like
hi guys ive had one of these in my bike for about a month now and it works great, no complaints at all its been very reliable, i have now just added a voice output to it and i thought i would share it with you!
i live on the facebook group. and im rarely on here.
4 Likes
Nice work and thanks for the share.
Would be cool if you did your own separate project for this one, otherwise it may get over looked.
1 Like