hi all,
shall we build something like this for the hackspace?
const
Constantin,
I made a UV exposure box a long time ago in the space. It’s available,
just no one uses it 
Including myself…mostly because UV coated PCB
material is expensive and it adds an extra process to making a PCB. The
developing solution required to make the PCB tracks appear does not keep
and needs replacing all of the time. Sodium hydroxide solution can be
affected by sunlight…
However it is available for your use at any time and I would like to see
people using it! I can show you how if you get some UV sensitized PCB and
want to make a PCB up.
Cheers
AlexOn 27 August 2014 11:32, Constantin Popp constantin.popp@gmail.com wrote:
hi all,
shall we build something like this for the hackspace?
http://hackaday.com/2014/08/27/make-your-own-uv-exposure-box-for-pcb-manufacture-at-home/
const–
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From memory/research, the UV process is both:
a) requires calibrating for board-type and tube strength
b) is probably not much better than the transfer methods we’re using
c) requires more expensive boards
d) uv light is not good for humansOn 27 August 2014 11:32, Constantin Popp constantin.popp@gmail.com wrote:
hi all,
shall we build something like this for the hackspace?
http://hackaday.com/2014/08/27/make-your-own-uv-exposure-box-for-pcb-manufacture-at-home/
const–
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Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com
Ben,
I have done it. Professionals do calibrate for board type and tube
length…I didn’t bother and it worked.
I also feel the toner transfer method is just as effective and quicker
because there are less steps involved.
The pre-sensitised PCB material is more than 2.5 times the cost of standard
FR4 copper clad.
UV light is not good for humans however the type C LEDS I used are not
powerful enough to give someone a sun-tan but do make eyes gritty…please
wear sunglasses if you are using the box and do NOT stare directly into the
light.
It is an option if someone wants to make a very detailed PCB with very thin
tracks etc and can’t be bothered to wait for Elecrow. I suspect Constantin
is interested because he struggles with the toner transfer method. It does
take some practice to get the process right.
Cheers
AlexOn 27 August 2014 12:41, Ben Dooks bjdooks@googlemail.com wrote:
From memory/research, the UV process is both:
a) requires calibrating for board-type and tube strength
b) is probably not much better than the transfer methods we’re using
c) requires more expensive boards
d) uv light is not good for humansOn 27 August 2014 11:32, Constantin Popp constantin.popp@gmail.com wrote:
hi all,
shall we build something like this for the hackspace?
http://hackaday.com/2014/08/27/make-your-own-uv-exposure-box-for-pcb-manufacture-at-home/
const–
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Ben Dooks, http://www.fluff.org/ben/ bjdooks@googlemail.com–
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hey ben and alex,
thanks a million for those answers. it’s quite interesting to read all
those implications. learned a lot again.
cheers.
constOn Wednesday, 27 August 2014 13:52:13 UTC+1, Alexander Lang wrote:
Ben,
I have done it. Professionals do calibrate for board type and tube
length…I didn’t bother and it worked.
I also feel the toner transfer method is just as effective and quicker
because there are less steps involved.
The pre-sensitised PCB material is more than 2.5 times the cost of
standard FR4 copper clad.
UV light is not good for humans however the type C LEDS I used are not
powerful enough to give someone a sun-tan but do make eyes gritty…please
wear sunglasses if you are using the box and do NOT stare directly into the
light.It is an option if someone wants to make a very detailed PCB with very
thin tracks etc and can’t be bothered to wait for Elecrow. I suspect
Constantin is interested because he struggles with the toner transfer
method. It does take some practice to get the process right.Cheers
Alex
On 27 August 2014 12:41, Ben Dooks <bjd...@googlemail.com <javascript:>> wrote:
From memory/research, the UV process is both:
a) requires calibrating for board-type and tube strength
b) is probably not much better than the transfer methods we’re using
c) requires more expensive boards
d) uv light is not good for humansOn 27 August 2014 11:32, Constantin Popp <constan...@gmail.com <javascript:>> wrote:
hi all,
shall we build something like this for the hackspace?
http://hackaday.com/2014/08/27/make-your-own-uv-exposure-box-for-pcb-manufacture-at-home/
const–
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<javascript:>.
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Ben Dooks, http://www.fluff.org/ben/ bjd...@googlemail.com <javascript:>–
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