Electronics nerds?

[Disco Dan]

ok, cheers for all your help folks... going to head down to DSE glenfield and check out what they can do for me.

Either voltage reg or cig lighter adaptors.

[nodrog:Me]

make sure you take a fire extinguisher with you when you test it out

[Disco Dan]

Ok, just went and got myself one of these:

http://www.dse.co.nz/cgi-bin/dse.sto...uct/View/M9944

but bugger me if i ran into another problem!

...you see when I connect a mini usb plug to Navman it thinks it's connected to a computer and turns itself off!

So now I am hoping that if i cut the usb-usb mini cable and cut the data wires then re-attach just the two power wires it should charge while still being 'on'.

If not.. then I will have no choice but to buy the OEM charger... grrr

[dhunt]

Ok, just went and got myself one of these:

http://www.dse.co.nz/cgi-bin/dse.sto...uct/View/M9944

but bugger me if i ran into another problem!

...you see when I connect a mini usb plug to Navman it thinks it's connected to a computer and turns itself off!

So now I am hoping that if i cut the usb-usb mini cable and cut the data wires then re-attach just the two power wires it should charge while still being 'on'.

If not.. then I will have no choice but to buy the OEM charger... grrr

I would actually assume the the data wires in the power supply you just got are not connected anyway.

Does the OEM Navman charger use the usb port to charge the unit?

[Disco Dan]

I would actually assume the the data wires in the power supply you just got are not connected anyway.

Does the OEM Navman charger use the usb port to charge the unit?

Still thinks it's connected to a computer!!!!

only port is a mini usb socket on the bottom - connects to a pc

The charger also uses this socket.

It's still turning off when i connect it with only the two wires

[Disco Dan]

How on earth can it tell the difference???

Unless - it DOES use the data wires - ie oem charger supplies small voltage through data wires?

But then again, a computer would send a signal through the data wires!!

[vindy500]

suck it up and buy the oem charger, you dont want to lose your warranty

[dhunt]

1) What is the normal behaviour when you plug it into the a computer? Does it turn off then?

2) After it has turned off (while still plugged into your power supply) can you turn it on?

[Disco Dan]

suck it up and buy the oem charger, you dont want to lose your warranty

well if you can imagine that when my bike got stolen the mounting bracket and charger were on the bike...

They are $49 each

Last week I bit the bullet and bought a RAM mount for $140

That blew my budget and thus I need a cheap/free solution to charge it.

I have already bought a cig lighter socket for about $6 and now a usb cig socket for $25.

I was REALLY hoping I was not going to need to buy anything else.. let alone having to pay $49 for the oem charger! ! !

[Disco Dan]

1) What is the normal behaviour when you plug it into the a computer? Does it turn off then?

2) After it has turned off (while still plugged into your power supply) can you turn it on?

When plugged into computer via USB it turns off and displays a graphical image showing it is connected to computer via usb.

When plugged into my power supply on the bike it does the same thing. Pressing the button does nothing.

Could it be related to the full size usb socket on the other end (connected to the new adaptor i just got) ? But then again with the data wires cut it may as well not be there anyway since it's only supplying power!
]

Just does not make any sense!

[Disco Dan]

I am pretty sure the oem charger only has two pins inside the mini usb plug (that goes into navman) though?

But I doubt if it is possible to disasemble the plug and remove the extra pins.

Could it be detecting the pins?

I think I will attempt to lever out the pins with a knife and see if it makes any difference. Cut the cable to bits so got nothing to lose now!

[dhunt]

How do you normally charge it? Through the computer? If it's a wall pack what is the output voltage?

[Disco Dan]

How do you normally charge it? Through the computer? If it's a wall pack what is the output voltage?

i normally charged it while it was on the bike using the car charger.

Since the charger was stolen I have used a usb cable from my computer to charge it.

Does not use a wall pack to charge.

I have just snapped off the middle pins on the mini usb plug, leaving only the two power pins and tried that - no change.

Really got me stumped.

Not sure what to try next.

[Disco Dan]

1) ruled out 'data pins' being detected - both cutting the wires and removing the pins in the socket.

2) could be a voltage difference - but USB is pretty standard at 5v

3) Could be the 5th pin - which as you can see in diagram above is not used. Maybe Navman uses it to tell between the charger/pc. If that is the case.. i've already removed it. even if it was there, there is no wire and the plug would have to be butchered beyond usable to try applying a voltage.

[Disco Dan]

Ok found a bit more info...

Looks like the 5th pin DOES do something... but it says "type B - pin 4 not used".

"pin 4 - Permits distinction of micro-A and micro-B plug. Type A plug - ground. Type B - not used.