shift light and gear indicator light

[VanceW]

I'm just not a very electrical oriented person. That kind of stuff usually leaves me stumped. I looked at that link you provided to figure out what the display unit would be called to search ebay to see price ranges for them. Maybe radioshack or similar sells a seven segment display like that I can use. I just don't know how they work, like how to wire it up. If I would have to use resisters or something to make position "x" read out as a three or whatever its supposed to be. Maybe once I find one locally the store I buy it from can shed some light. If not I may have to pic your brain a little.

[DonTZ125]

I'm actually reading up on 7-segment display drivers as we speak / write; it's actually straightforward if you're prepared to use a PCB or proto board. If Darren can't get the 'Zuk piece to work in a FZR mount, I may have a few ideas. The problem is that the Suzuki piece (and thus Darren's design basis) is a voltage divider, while the FZR version is simply 6 (7 counting neutral) separate contacts to ground. The hardest part I think with the Suzuki piece will be the center contact.

[VanceW]

Ok, now I'm really confused. Haha.
I see that the suzuki has a center contact. behind the fzr sensor there is no middle point. Theres a screw in the center of the piece that has the ball that moves around the outside but our sensor only has the one (neutral) point.
I was literally just trying to figure out why there was a center contact point on the suzuki version.

[ragedigital]

Yeah, 7 segment displays usually require a microcontroller to operate properly - at least that's what I use. Each segment is a separate circuit of LEDs. To have a specific order of them light up requires something that can turn on multiple segments at one time.

My issue is that I don't have an FZR here to test it out. If anyone could make the unit function, it would be Don. I doubt he wants to spend the cash to make it work - he might be bored though. I have a spare Suzuki Gear Position Switch and Yamaha switch here that I would send him for nothing. I may also have an old test display unit for him to play with as well.

That center contact is GROUND and there is a wire attached directly to it.

Darrin

[VanceW]

The fzr only has one wire going to the sensor, the contact point for neutral. There is no wire feeding ground path to the part that rotates.

[DonTZ125]

Correct; there is also no set of 6 wires coming OUT from the sensor. This will take significant modifying to make it work

I'm rummaging around on the Mouser website, looking at 7-segment drivers. Most of them will accept a binary-coded input, which would be quite simple with the 6 contacts going to ground. Some pull-up resistors and NAND gates feeding the driver, then inline resistors to the 7-seg display - I won't say "Too easy", but it certainly isn't insurmountable.

On the 3rd or 4th page of the YZF link above, there was a template for machining your own 6+N GPS switch in the FZR/YZF form, so no tracing or re-drawing should be necessary.

[ragedigital]

The fzr only has one wire going to the sensor, the contact point for neutral. There is no wire feeding ground path to the part that rotates.

I don't believe it matters. The brass piece attached to the shift drum should already be touching ground which will complete the circuit.

[VanceW]

Those displays are the same as in clocks, right? Could I just take apart an old digital clock and try to rig it up the way I want? I'm sure its one long board instead of multiple small ones but couldn't they be separated and already have most the stuff I need, just wire it up right?

Just trying to figure out if it already is grounded why yours had a center ground point then?

[DonTZ125]

Thanks guys that was a lot of important info. you guys are life savers. Now that the gear indicator is out of the way, how would I do the shift light. I know It has something to do with the tacometer. Do I just wire it straight to the wire that controls the rev limiter or something

This got a little overlooked in the GPS discussion. As I mentioned, every shift light is different. Also, there is no rev limiter on the FZRs, unless you've ordered one of mine or some other brand. My rev limiter is just a speed switch, and I can easily modify it for use as a shift light driver.

[ragedigital]

Just trying to figure out if it already is grounded why yours had a center ground point then?

The fzr only has one wire going to the sensor, the contact point for neutral. There is no wire feeding ground path to the part that rotates.

The SUZUKI provides a GROUND for the circuit through that center wire.

The FZR uses the shift cam (drum) as GROUND. That is why the FZR only has the one wire.

[tclayton9]

thank you so much