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Subject: Mad scientist attacks TL120!
Date: 2015-02-15 01:22:40
From: John Thurston

Attachments :

{fiendish laugh}I have created a monster! Now, my TL120-55 (A
TL120-1 with 55mm Mamiya lenses) sports an external flash
connector, _and_ an external power connector.

Is the cold sapping the energy from those wimpy SR44 cells?
You wanna do 6 hour exposures? No problemo. You supply the
power from any battery pack between 4V and 32V.

I'm planning on doing the same to my TL120-1 and post a write
up with photos on my web page, but I had to share :)
--
John Thurston
Juneau, Alaska

Subject: Re: Mad scientist attacks TL120! [1 Attachment]
Date: 2015-02-15 13:45:18
From: gornitai

Very cool! Way to go, John. If anybody could pull that off, you could.

Larry

---- "John Thurston juneau3d@thurstons.us [MF3D-group]" <MF3D-group@yahoogroups.com> wrote:

> {fiendish laugh}I have created a monster! Now, my TL120-55 (A
> TL120-1 with 55mm Mamiya lenses) sports an external flash
> connector, _and_ an external power connector.
>
> Is the cold sapping the energy from those wimpy SR44 cells?
> You wanna do 6 hour exposures? No problemo. You supply the
> power from any battery pack between 4V and 32V.
>
> I'm planning on doing the same to my TL120-1 and post a write
> up with photos on my web page, but I had to share :)
> --
> John Thurston
> Juneau, Alaska

Subject: Re: Mad scientist attacks TL120!
Date: 2015-02-15 14:22:55
From: Geoffrey Waldo

John,

Very nice indeed. This is something I'd like to do with my TL120-1 as well, I can't wait to see more details!
-geoff

On Sun, Feb 15, 2015 at 12:45 PM, larryeda@nc.rr.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

Very cool! Way to go, John. If anybody could pull that off, you could.

Larry

---- "John Thurston juneau3d@thurstons.us [MF3D-group]" <MF3D-group@yahoogroups.com> wrote:
> {fiendish laugh}I have created a monster! Now, my TL120-55 (A
> TL120-1 with 55mm Mamiya lenses) sports an external flash
> connector, _and_ an external power connector.
>
> Is the cold sapping the energy from those wimpy SR44 cells?
> You wanna do 6 hour exposures? No problemo. You supply the
> power from any battery pack between 4V and 32V.
>
> I'm planning on doing the same to my TL120-1 and post a write
> up with photos on my web page, but I had to share :)
> --
> John Thurston
> Juneau, Alaska

--
Gfpguy1@gmail.com

**Consulting on Protein Solubility, Folding, Engineering, & Detection**

Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel: 505-667-8161 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979

Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site: http://techcenter.mbi.ucla.edu

Subject: Re: Mad scientist attacks TL120! [1 Attachment]
Date: 2015-02-16 13:08:49
From: John Thurston

On 2/14/2015 10:22 PM, John Thurston juneau3d@thurstons.us [MF3D-group]
wrote:

> {fiendish laugh}I have created a monster! Now, my TL120-55 (A
> TL120-1 with 55mm Mamiya lenses) sports an external flash
> connector, _and_ an external power connector.
>

Arrgh! I investigated my camera yesterday and discovered I messed up.
There is a parasitic drain in my voltage regulator which is draining the
standard batteries :( I'm gonna have to rewire... maybe include a
switch... maybe move the regulator out of the camera and into the power
cable... I duno yet, but it's back to the drawing board and I'm very bummed.

This doesn't change any of the background information about batteries I
contributed yesterday. That is still valid.
--
John Thurston
Juneau, Alaska

Subject: Re: Mad scientist attacks TL120!
Date: 2015-02-16 14:22:54
From: Geoffrey Waldo

If it worked perfectly first time, it wouldn't be research...

On Mon, Feb 16, 2015 at 12:09 PM, John Thurston juneau3d@thurstons.us [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

On 2/14/2015 10:22 PM, John Thurston juneau3d@thurstons.us [MF3D-group]
wrote:
> {fiendish laugh}I have created a monster! Now, my TL120-55 (A
> TL120-1 with 55mm Mamiya lenses) sports an external flash
> connector, _and_ an external power connector.
>

Arrgh! I investigated my camera yesterday and discovered I messed up.
There is a parasitic drain in my voltage regulator which is draining the
standard batteries :( I'm gonna have to rewire... maybe include a
switch... maybe move the regulator out of the camera and into the power
cable... I duno yet, but it's back to the drawing board and I'm very bummed.

This doesn't change any of the background information about batteries I
contributed yesterday. That is still valid.
--
John Thurston
Juneau, Alaska

--
Gfpguy1@gmail.com

**Consulting on Protein Solubility, Folding, Engineering, & Detection**

Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel: 505-667-8161 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979

Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site: http://techcenter.mbi.ucla.edu

Subject: Re: Mad scientist attacks TL120!
Date: 2015-02-16 15:01:39
From: John Thurston

On 2/16/2015 11:22 AM, Geoffrey Waldo gfpguy1@gmail.com [MF3D-group] wrote:

> If it worked perfectly first time, it wouldn't be research...

But if my findings had been peer-reviewed _before_ I hacked up my
camera, I may have been able to save myself a whole bunch of hassle :(

I think I may be able to insert a blocking diode between my voltage
regulator and the stock battery. I see a couple of Schottky diodes with
a forward drop of only .45v. My regulator is putting out 3.3v so I think
I can afford that loss. At the voltages I'm working, the reverse current
leakage is down around .01 microamps. Yeah, that's some leakage, but
it's pretty darned small leakage.

I have a few diodes kicking around the bench. I probably have something
close enough for experimenting prior to placing a parts order.
--
John Thurston
Juneau, Alaska

Subject: Re: Mad scientist attacks TL120!
Date: 2015-02-21 17:54:13
From: John Thurston

On 2/16/2015 10:09 AM, John Thurston wrote:

> On 2/14/2015 10:22 PM, John Thurston juneau3d@thurstons.us
> [MF3D-group] wrote:
>> {fiendish laugh}I have created a monster! Now, my TL120-55 (A
>> TL120-1 with 55mm Mamiya lenses) sports an external flash
>> connector, _and_ an external power connector.
>>
>
> Arrgh! I investigated my camera yesterday and discovered I
> messed up. There is a parasitic drain in my voltage regulator
> which is draining the standard batteries :( I'm gonna have to
> rewire... maybe include a switch... maybe move the regulator
> out of the camera and into the power cable... I duno yet, but
> it's back to the drawing board and I'm very bummed.

It's alive!!! I've added a small diode to prevent the
parasitic drain, and it works very nicely. Any parasitic
current is below threshold of my meter. I have a new (more
sensitive) meter on order, and I'll be checking my work with
that as soon as it arrives.

I've added a new page to my web site with details and more
photos.
http://stereo.thurstons.us/content/?page_id=356
Drop me a note if you have any questions or notice any
problems with my notes.

My next project is to incorporate this regulated input into
an adapter plate with a battery-plug. The goal is to let me
(or you) use external power by dropping the button cells,
screwing a plate to the bottom of the camera, and connecting
a battery to a jack on the plate. The plate would be threaded
to accept whatever tripod mount you liked.
--
John Thurston
Juneau, Alaska

Subject: Re: Mad scientist attacks TL120!
Date: 2015-02-21 22:46:27
From: Geoffrey S. Waldo

Beautiful work can't wait to see details!

Sent from my iPad

-----------------------------------------------------------------

My personal contact information:

Email: Gfpguy1@gmail.com

Cell: 505-204-6979

Home: 505-930-5139

Residential Mailing Address

(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

2929 Cliff Palace

Santa Fe, NM 87507

USA

----------

Consulting:

**Protein Solubility, Folding, Engineering, & Detection**

----------

Work Contact Information:

Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel: 505-667-8161 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979

Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Feb 21, 2015, at 4:54 PM, John Thurston juneau3d@thurstons.us [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

On 2/16/2015 10:09 AM, John Thurston wrote:
On 2/14/2015 10:22 PM, John Thurston juneau3d@thurstons.us
[MF3D-group] wrote:
{fiendish laugh}I have created a monster! Now, my TL120-55 (A
TL120-1 with 55mm Mamiya lenses) sports an external flash
connector, _and_ an external power connector.

Arrgh! I investigated my camera yesterday and discovered I
messed up. There is a parasitic drain in my voltage regulator
which is draining the standard batteries :( I'm gonna have to
rewire... maybe include a switch... maybe move the regulator
out of the camera and into the power cable... I duno yet, but
it's back to the drawing board and I'm very bummed.

It's alive!!! I've added a small diode to prevent the
parasitic drain, and it works very nicely. Any parasitic
current is below threshold of my meter. I have a new (more
sensitive) meter on order, and I'll be checking my work with
that as soon as it arrives.

I've added a new page to my web site with details and more
photos.
  http://stereo.thurstons.us/content/?page_id=356
Drop me a note if you have any questions or notice any
problems with my notes.

My next project is to incorporate this regulated input into
an adapter plate with a battery-plug. The goal is to let me
(or you) use external power by dropping the button cells,
screwing a plate to the bottom of the camera, and connecting
a battery to a jack on the plate. The plate would be threaded
to accept whatever tripod mount you liked.
--
John Thurston
Juneau, Alaska

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