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Seek PCB thinner than 1.6mm

J

john

I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?

TIA.
 
D

DJ Delorie

john said:
All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?
Click to expand...

I've got some 8 mil (0.2mm) copper clad on ebay, but all you really
need is two strips of aluminum foil, card stock, and some double sided
tape. Or buy some copper foil tape at the hardware store.
 
A

att

john said:
I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?

TIA.
Click to expand...

When I was faced with the same issue I used aluminum foil and waxed paper to
get a meter into the battery circuit of my Pentax digital camera. If you
want something more permanent try a piece of one of those almost impossible
to open plastic blister packs with copper strips super-glued on. Solder the
wires to the copper strips before you glue them to the plastic or you'll
have a sloppy mess. That should be thin enough for what you want.
 
A

Archimedes' Lever

I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?

TIA.
Click to expand...


0.032" is the thinnest I've worked with. I think it was 4 layers.
 
S

Sjouke Burry

john said:
I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?

TIA.
Click to expand...
In any old broken down piece of electronics.
 
D

David L. Jones

john said:
I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?
Click to expand...

Everyone sells 0.8mm which is the next standard size down.
Most PCB suppliers will go down to 0.5mm as standard, and thinner if you ask
them. The thinner stuff (down to 0.1mm or below) is actually pre-preg or
core used in multi layer PCB's. It is actually surprisingly flexible and you
can actually use it as "flex PCB" in designs that call for a curved board
that doesn't move after installed.

http://cgi.ebay.com.au/3-Double-Sid...rical_Equipment_Tools?_trksid=p3286.m20.l1116

Dave.
 
B

Boris Mohar

I want to create a probe to out in between two AA or AAAA cells to
detrmine the current flowing.

The probe could be made up of double-sided circuit board with a
wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm thick PCD. Where can I get a
bit of thinner board?

TIA.
Click to expand...


Adhesive backed copper tape from stained glass store.



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place
 
J

john

Awwwww! Sorry about the awful typos! Blush. The English
version of what I mean to say is ...



I want to create a probe to put in between two AA or two AAA
cells to determine the current flowing.

The probe could be made up of a piece of double-sided circuit
board with a wire coming from the contact area on each side.

All I see in the catalogues is 1.6mm PCB. Where can I get a bit
of thinner board?




On 22-Mar-2009, IGNORE what john wrote WITH THESE TYPOS...
 
P

[email protected]

 0.032" is the thinnest I've worked with.  I think it was 4 layers.
Click to expand...

WORK ON THE WAY OUT OF USENET
IT IS NOT YOUR PERSONAL LITTLE BUSINESS DEVICE
IN CASE YOU HAVEN'T NOTICED ARCHIMEDES' YOU HAVE BEEN DEAD FOR YEARS
YOUR LEVER HISTORY
TRY A PCB SHAKE WITH YOUR LUNCH AND REJOIN REALITY

I AM PROTEUS
 
J

john

You might try some Kapton wiring with copper on both sides.
Click to expand...

I haven't seen flexible PCB with different contacts on both sides.
(I sometimes see felxible PCB with the same contact on each side.)

I tried the flexible PCB in the link and tried to glue two pieces
back to back so the contacts faced outwards but the adhesive
started to spilt after a number of insertions.

<http://uk.farnell.com/molex/98267-0211/cable-flat-ffc-6way-
152mm/dp/1079966> or http://tinyurl.com/c3zbvr

I figured a bit of thin circuit board might be stronger.
 
J

john

Everyone sells 0.8mm which is the next standard size down.
Most PCB suppliers will go down to 0.5mm as standard, and
thinner if you ask them. The thinner stuff (down to 0.1mm or
below) is actually pre-preg or core used in multi layer PCB's.
It is actually surprisingly flexible and you can actually use
it as "flex PCB" in designs that call for a curved board that
doesn't move after installed.

http://cgi.ebay.com.au/3-Double-Sided-12-x-18-x-030-1-2-Oz-
Copper-Clad-PCB_W0QQitemZ350173919831QQcmdZViewItemQQptZBI
_Electrical_Equipment_Tools?_trksid=p3286.m20.l1116

Dave.
Click to expand...

Sorry, I just don't like to use eBay! Farnell UK has a lot of
similar prototypng board (if that's the right category) but it
either 1.6mm or single sided.

Here is what I got: <http://preview.tinyurl.com/dytur2>
 
A

Archimedes' Lever

I haven't seen flexible PCB with different contacts on both sides.
(I sometimes see felxible PCB with the same contact on each side.)

I tried the flexible PCB in the link and tried to glue two pieces
back to back so the contacts faced outwards but the adhesive
started to spilt after a number of insertions.

<http://uk.farnell.com/molex/98267-0211/cable-flat-ffc-6way-
152mm/dp/1079966> or http://tinyurl.com/c3zbvr

I figured a bit of thin circuit board might be stronger.
Click to expand...


There is bare FR4 media you can buy. Then, you can add foil or
whatever as contact media, and construct your own without resorting to
buying expensive clad media.
 
K

K Ludger

john said:
Sorry, I just don't like to use eBay! Farnell UK has a lot of
similar prototypng board (if that's the right category) but it
either 1.6mm or single sided.

Here is what I got: <http://preview.tinyurl.com/dytur2>
Click to expand...


Try to find a local supplier for Kinsten PCB products. They do a 0.4mm
double sided sheet 300 x 150 x 0.4mm for around AU$10
 
J

john

http://www.mgchemicals.com/products/500.html
0.4mm double sided

Distributors
http://www.mgchemicals.com/distributors/index.html
Click to expand...


That's nice! But as I want just a fragment then I am limited to
getting it from a parts supplier.

Following that up, the thinnest I came across was 0.8mm which isn't
all that wonderfully thin:

<http://uk.farnell.com/cif/aeb16/copper-clad-2-sides-8-10-35µ-
100x160mm/dp/1643094> or <http://tinyurl.com/ceu7ng>

As an alternative I thought of Flat Flexible Cable but can't find
double sided.
 
A

Archimedes' Lever

I haven't seen flexible PCB with different contacts on both sides.
(I sometimes see felxible PCB with the same contact on each side.)

I tried the flexible PCB in the link and tried to glue two pieces
back to back so the contacts faced outwards but the adhesive
started to spilt after a number of insertions.

<http://uk.farnell.com/molex/98267-0211/cable-flat-ffc-6way-
152mm/dp/1079966> or http://tinyurl.com/c3zbvr

I figured a bit of thin circuit board might be stronger.
Click to expand...


You can take bare stock of FR4 or G10 variety, which can be had down to
like 0.015" inch (perhaps thinner).

It is very stiff, and you can place conductors across it and put Kapton
tap over the conductor, leaving a hole in the "contact area". Do the
same on the other side, and take your readings from the leads you attach.

You'll get better results as the strip you use will be heavier gauge
than any PCB cladding could ever be.

I would fan out a simple piece of Teflon (PTFE) insulated, Silver Plated
Copper (SPC) stranded wire. You fan out a strip length of a few mm, and
place the Kapton tape with the hole in it over the fanned out area. Same
on opposite side. Kapton over the "nose" of it lets you slip it right
in.
 
A

Archimedes' Lever

As an alternative I thought of Flat Flexible Cable but can't find
double sided.
Click to expand...

Cut up a segment from an old UDMA hard drive cable. Bare the top side
of one conductor, and the bottom side of a neighboring conductor. Jam it
in there.
 
A

Archimedes' Lever

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