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Arduino
From: CHYRON (DSMITHHFX)
26 Jan 2015 16:18
To: Chris (CHRISSS)
234 of 542
40898.234
In reply to
40898.184
Don't pull that out at the airport.
From: koswix
26 Jan 2015 17:09
To: ANT_THOMAS
235 of 542
40898.235
In reply to
40898.232
There's a few options for making the PCB.
You can order them from a PCB fab place, but it really doesn't make financial sense unless you're doing a fairly big run of boards. I read a while ago about a new service someone was setting up getting small batches done via China for pretty cheap (compared to normal prices, anyway). Can't remember what it was called.
Making your own: Simplest way is toner transfer to transfer the layout to a copper board, and then you chemically etch the rest of the copper off. Can be hit and miss (I've heard) with small traces - depends on your print quality/transfer quality.
An interesting alternative is to use a CNC mill to remove the unneeded copper, with precision being governed by the quality of your CNC machine.
From: koswix
26 Jan 2015 17:11
To: koswix
236 of 542
40898.236
In reply to
40898.235
(the other other method is to be at Uni, where they have proper PCB manufacturing kit that can do plated through-holes, multi layers, masks, type etc. )
From: ANT_THOMAS
26 Jan 2015 17:56
To: koswix
237 of 542
40898.237
In reply to
40898.236
I might get you to make me one then....!
Otherwise I saw the toner transfer one, getting the chemicals to do the job should be easy for me. Might give that a go.
From: koswix
26 Jan 2015 19:46
To: ANT_THOMAS
238 of 542
40898.238
In reply to
40898.237
Sadly I don't get direct access to it, have a friendly lecturer who's happy to get stuff done for me for my silly projects but not sure he'd be happy to extend that to "this guy in met on the Internet."...
From: Chris (CHRISSS)
26 Jan 2015 22:08
To: ANT_THOMAS
239 of 542
40898.239
In reply to
40898.237
How big so you want it? An American site doing 3 copies of a 2 layer board for $5 per square inch + $5
delivery
shipping.
EDITED: 26 Jan 2015 22:20 by CHRISSS
From: ANT_THOMAS
26 Jan 2015 22:22
To: Chris (CHRISSS)
240 of 542
40898.240
In reply to
40898.239
I was thinking 20cm x 15cm. That's probably on the big side.
From: Chris (CHRISSS)
26 Jan 2015 23:04
To: ANT_THOMAS
241 of 542
40898.241
In reply to
40898.240
That'd work out pretty expensive then. I suppose even a few inches each side wouldnt be cheap. Could you squash it into 1"x1"?
;)
From: Chris (CHRISSS)
26 Jan 2015 23:40
To: CHYRON (DSMITHHFX)
242 of 542
40898.242
In reply to
40898.234
Could be fun to try it. Might depend if I'm in the mood for a full body search or not.
From: Chris (CHRISSS)
27 Jan 2015 02:05
To: ANT_THOMAS
243 of 542
40898.243
In reply to
40898.240
I've just been playing with the PWM output with my LED strips. I cut off a small section to test with the Uno.
There's a library called PWM which lets you choose any frequency. I set the frequency to 2000Hz and the flicker at the lowest brightness was almost undetectable. At 20,000Hz (I didn't test anything in between) it had completely gone.
If you have problems with flicker give that a go. I'm now thinking it might be worth setting up an Arduino to control the lights as I don't really like the flicker at low brightness and it would be nice to get rid of it.