integrated circuit geeks: 6V - 50V to 5V 0.2A Converter IC

 

I'd like to feed the light coil's output of Jim's GG300
through a full way bridge rectifier and need something that'll
convert this rather varying voltage to stable 5V DC.

That would then be fed into the Garmin Vista via the USB port,
eliminating vibration shut downs and battery drain while
riding.

   Any suggestions what device will turn a rather undefined
   DC Voltage into 5V ? (200mA max would be sufficient,
   step up conversion from below 5V input istn't required)

TIA
Rowdy

 

Am 28.07.2010 14:49, schrieb Rowdy:

Addendum:
I know one could hang a resistor and a 6V Zener diode
at the Basis of a medium power transistor and the USB+
at the emitter with another resistor to the input voltage
smoothing things out with a capacitor but being lazy
and on a tight schedule for spodefest, I though maybe
there is an IC / gadget out there, that can do that better
with minimal external circuity.
Something like an "USB power out from anything in"...

Rowdy

 


you are some kind of psychic? I was researching this subject right
now... found some promising ways:

http://www.instructables.com/id/USB-power-plug-in-2010-Prius-III/
http://www.instructables.com/id/How-To-Make-Your-Own-USB-Car-Charger-For-An=
y-iPod-/
http://www.bixnet.com/usbbatterybox.html

also, I found this:
http://www.cyclenutz.com/products/gps_navigation/gps_accessories/mini_usb_1=
2v_hardwire_cable.html


but the fact you're taking it out of a bike that has no charging
system/battery and most likely the output is AC... I dunno if these
schemas might work for you...

--

 

Am 28.07.2010 15:44, schrieb Tiago:

12 V input, max. 15


http://www.instructables.com/id/How-To-Make-Your-Own-USB-Car-Charger-For-Any-iPod-/

ditto.


better: "Vehicle Cigarette Lighter Adapter. (12~24v DC) "


http://www.cyclenutz.com/products/gps_navigation/gps_accessories/mini_usb_12v_hardwire_cable.html

12~24V is good but it's way too bulky for a motorcycle.

Exactly. They won't.  They rely on a stable, non zero touching input
voltage of at least say 10V.

Bikes w/o battery have absolutely ugly voltage "regulators".  My late
WR400F had a device that wold short circuit voltages above 18V.
E.g. it would cut the rising slope of the AC voltage off when it
reached 22V and _keep it short circuited_ till the sine would cross
zero.
The equivalent voltage of the area under that jagged kurve would not
exceed the 12~14V a light bulb has to cope with in a vehicle with
battery and that is the only thing the bulbs care about.

I presume the GG300 has a similar regulator more precisely bulb saver
hence rectifying and elaborate buffering (capacitor) must be applied to
produce USB typical 5V.

I'm pretty sure that the Garmin would work well on a pulsed 5V input
whose frequency changed according to engine rpm...


Rowdy

 

Am 28.07.2010 15:44, schrieb Tiago:
 > you are some kind of psychic? I was researching this subject right
 > now... found some promising ways:
 >
 > http://www.instructables.com/id/USB-power-plug-in-2010-Prius-III/

12 V input, max. 15

 >
http://www.instructables.com/id/How-To-Make-Your-Own-USB-Car-Charger-For-Any-iPod-/

ditto.

 > http://www.bixnet.com/usbbatterybox.html
better: "Vehicle Cigarette Lighter Adapter. (12~24v DC) "

 > also, I found this:
 >
http://www.cyclenutz.com/products/gps_navigation/gps_accessories/mini_usb_12v_hardwire_cable.html

12~24V is good but it's way too bulky for a motorcycle.
 >
 > but the fact you're taking it out of a bike that has no charging
 > system/battery and most likely the output is AC... I dunno if these
 > schemas might work for you...

Exactly. They won't.  They rely on a stable, non zero touching input
voltage of at least say 10V.

Bikes w/o battery have absolutely ugly voltage "regulators".  My late
WR400F had a device that wold short circuit voltages above app. 22V!
E.g. it would cut the rising slope of the AC voltage off when it
reached 22V and _keep it short circuited_ till the generator output
would cross zero (reverse polarity).
The equivalent voltage of the area under that jagged curve would not
exceed the area under constant 12~14V a light bulb has to cope with
in a vehicle with battery and that is the only thing the bulbs care about.

I presume the GG300 has a similar regulator, more precisely bulb saver,
hence rectifying and elaborate buffering (capacitor) must be applied to
produce USB typical 5V.

I'm pretty sure that the Garmin would not work well on a pulsed 5V input
whose frequency changed according to engine rpm...


Rowdy