Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

[Jau-Yang Chen]

Dear Dave,

The design of GR-601W/Macx-1 supports both supercap and battery, which are
with the same form factor and I/O interface. The default is with battery.
It's OK to mount supercap per customers' request and order before
manufacture.

We are glad to offer you the same price to meet your special requirement
with supercap. The lead time is the same if there is forecast ahead so that
we could arrange the production accordingly.

Best regards,

JY

-----Original Message-----
From: Dave Taht [mailto:dave.taht@gmail.com] 
Sent: Thursday, May 10, 2012 12:39 AM
To: Jau-Yang Chen
Cc: esr@thyrsus.com; tcf@navisys.com.tw; gloria@navisys.com.tw;
thumbgps-devel@lists.bufferbloat.net; lily; veronica
Subject: Re: [Thumbgps-devel] Article -- Macx-1: GPS receiver with standard
USB connector and PPS support

What would be the change in cost and delay in manufacturing to switch to
using a supercap, rather than battery?


--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://www.bufferbloat.net

Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

[Dave Taht]

On Wed, May 9, 2012 at 7:22 PM, Jau-Yang Chen <cjy@navisys.com.tw> wrote:
> Dear Dave,
>
> The design of GR-601W/Macx-1 supports both supercap and battery, which are
> with the same form factor and I/O interface. The default is with battery.
> It's OK to mount supercap per customers' request and order before
> manufacture.

Awesome!!! What is the duration of the supercap's charge in this configuration?

>
> We are glad to offer you the same price to meet your special requirement
> with supercap. The lead time is the same if there is forecast ahead so that
> we could arrange the production accordingly.
>
> Best regards,
>
> JY
>
> -----Original Message-----
> From: Dave Taht [mailto:dave.taht@gmail.com]
> Sent: Thursday, May 10, 2012 12:39 AM
> To: Jau-Yang Chen
> Cc: esr@thyrsus.com; tcf@navisys.com.tw; gloria@navisys.com.tw;
> thumbgps-devel@lists.bufferbloat.net; lily; veronica
> Subject: Re: [Thumbgps-devel] Article -- Macx-1: GPS receiver with standard
> USB connector and PPS support
>
> What would be the change in cost and delay in manufacturing to switch to
> using a supercap, rather than battery?
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
>



-- 
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://www.bufferbloat.net

Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

[Jau-Yang Chen]

Dear Dave,

After being fully charge, the supercap in Macx-1 could last around 4 hours,
and around one week for Li-ion battery,

Best regards,

JY

-----Original Message-----
From: Dave Taht [mailto:dave.taht@gmail.com] 
Sent: Thursday, May 10, 2012 10:39 AM
To: Jau-Yang Chen
Cc: esr@thyrsus.com; tcf@navisys.com.tw; gloria@navisys.com.tw;
thumbgps-devel@lists.bufferbloat.net; lily; veronica
Subject: Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

On Wed, May 9, 2012 at 7:22 PM, Jau-Yang Chen <cjy@navisys.com.tw> wrote:
> Dear Dave,
>
> The design of GR-601W/Macx-1 supports both supercap and battery, which 
> are with the same form factor and I/O interface. The default is with
battery.
> It's OK to mount supercap per customers' request and order before 
> manufacture.

Awesome!!! What is the duration of the supercap's charge in this
configuration?

>
> We are glad to offer you the same price to meet your special 
> requirement with supercap. The lead time is the same if there is 
> forecast ahead so that we could arrange the production accordingly.
>
> Best regards,
>
> JY
>
> -----Original Message-----
> From: Dave Taht [mailto:dave.taht@gmail.com]
> Sent: Thursday, May 10, 2012 12:39 AM
> To: Jau-Yang Chen
> Cc: esr@thyrsus.com; tcf@navisys.com.tw; gloria@navisys.com.tw; 
> thumbgps-devel@lists.bufferbloat.net; lily; veronica
> Subject: Re: [Thumbgps-devel] Article -- Macx-1: GPS receiver with 
> standard USB connector and PPS support
>
> What would be the change in cost and delay in manufacturing to switch 
> to using a supercap, rather than battery?
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
>



--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://www.bufferbloat.net

Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

[Eric S. Raymond]

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Gary E. Miller <gem@rellim.com>:
> Yo Jau-Yang!
> 
> On Thu, 10 May 2012 18:38:41 +0800
> "Jau-Yang Chen" <cjy@navisys.com.tw> wrote:
> 
> > After being fully charge, the supercap in Macx-1 could last around 4
> > hours, and around one week for Li-ion battery,
> 
> Well, that explains my one hour cold start when receiving the sample
> units.  One week hold-up is pretty short, and 4 hours hardly worth the
> effort.
> 
> Luckily the thumbgps project is for always on, but for weekend use neither
> is good.  Most mouse GPS have batteries are good for a month or more of
> standby.

Opps, wires are crossed here - I believe cjy was speaking
subjunctively and the device as shipped has a Li-ion battery in it,
but the supercap is a manufacturing option. He'll correct me if I'm
wrong.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

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Re: [Thumbgps-devel] supercap vs. battery in Macx-1 GPS receiver

[tz]

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Also the Ephemeris doesn't help if you move more than about 500 miles from
the last place it was turned on.   Until it can get at least a 2d fix and
new latitude/longitude, it won't know which satellites to look for.

The same thing happens with AGPS (the ephemeris usually lasts for a week
but not more).  You need to know the UTC time and the lat/lon within 500
miles.  On my old Nokia n810 you could tap your location.

On Thu, May 10, 2012 at 2:03 PM, Eric S. Raymond <esr@thyrsus.com> wrote:

> Gary E. Miller <gem@rellim.com>:
> > Yo Jau-Yang!
> >
> > On Thu, 10 May 2012 18:38:41 +0800
> > "Jau-Yang Chen" <cjy@navisys.com.tw> wrote:
> >
> > > After being fully charge, the supercap in Macx-1 could last around 4
> > > hours, and around one week for Li-ion battery,
> >
> > Well, that explains my one hour cold start when receiving the sample
> > units.  One week hold-up is pretty short, and 4 hours hardly worth the
> > effort.
> >
> > Luckily the thumbgps project is for always on, but for weekend use
> neither
> > is good.  Most mouse GPS have batteries are good for a month or more of
> > standby.
>
> Opps, wires are crossed here - I believe cjy was speaking
> subjunctively and the device as shipped has a Li-ion battery in it,
> but the supercap is a manufacturing option. He'll correct me if I'm
> wrong.
> --
>                <a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
>
> _______________________________________________
> Thumbgps-devel mailing list
> Thumbgps-devel@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/thumbgps-devel
>
>

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