Thread: ORGS build up
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Old 07-24-2010, 01:16 PM   #52
x3300 OP
geoff
 
Joined: Mar 2005
Location: San Jose, CA
Oddometer: 170
Dash Wiring

I've been working on the dash wiring and a lot of other miscellaneous things around the bike since my last report. I'm hoping to get the dash wiring done this weekend.

Here's what I've been dealing with.

http://stuff.gotdns.org/bike/orgs-build-up/21-dash-wiring/wiring-dash.jpg

All custom stuff for the most part. I made up this diagram to work from. It doesn't yet include the instrument lights.

http://stuff.gotdns.org/bike/orgs-build-up/21-dash-wiring/dash-diagram.jpg

On the dash I'll have switches for two independently switched auxiliary front lights, a switch for the headlight low beam, and a switch for the hazard flasher. I have a hazard capable flasher unit, but I still need to figure out what kind of switch it needs and how to wire it in. I'll also have a rotary pot for variable power grip heaters. I'll cover the design of these in another report.

To power the GPS unit I'll have a 5 volt source going to a USB Mini-B plug. This will plug directly into my GPS. I'll also have another 5 volt source going to a USB Series A receptacle to power auxiliary devices like a cell phone charger, a Walkman, or an NiMH battery charger.

Here's what I'm working on for the USB power, I'll have two separate LM7805 linear voltage regulators for the supply. I had some USB cables kicking around that I'll cut up and solder to the LM7805's output.

http://stuff.gotdns.org/bike/orgs-build-up/21-dash-wiring/usb-regulators.jpg

Just for reference, a typical pinout for USB connectors:

Code:
pin 1	red	+5 volt
pin 2	white	data -
pin 3	green	data +
pin 4	black	gnd
I'll just leave the white and green data lines unconnected. The regulators I chose can source 2 amps each, but to do so for very long will need good heat sinks on them. I'll screw them down directly to the aluminum dash for that.

-x3300
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