Homebrew PCBs

I recently made my first Toner Transfer PCB, and I have some photos on
Flickr, here:

http://www.flickr.com/photos/anachrocomputer/sets/72157607180910289/

It's an Atmel AVR board, inspired by the Evil Mad Scientist Labs business
card board:

http://www.evilmadscientist.com/article.php/card

I did the PCB design using GNU-PCB and printed the result on
junk-mail paper using an old HP LaserJet 4+ that I got from
FreeCycle.  Etched with Ferric Chloride and then drilled as
usual.

Now I have some plans afoot to make an ATmega32 board, and an
LED shift-register board.

-- 
John Honniball

Wow, didn't your eyes cross drilling all those holes?

At first i thought you etched it on some kind of pre-drilled stripboard...

ST

On Sun, Sep 14, 2008 at 3:29 PM, John Honniball <anachrocomputer@...
> wrote:

> I recently made my first Toner Transfer PCB, and I have some photos on
> Flickr, here:
>
> http://www.flickr.com/photos/anachrocomputer/sets/72157607180910289/
>
> It's an Atmel AVR board, inspired by the Evil Mad Scientist Labs business
> card board:
>
> http://www.evilmadscientist.com/article.php/card
>
> I did the PCB design using GNU-PCB and printed the result on
> junk-mail paper using an old HP LaserJet 4+ that I got from
> FreeCycle.  Etched with Ferric Chloride and then drilled as
> usual.
>
> Now I have some plans afoot to make an ATmega32 board, and an
> LED shift-register board.
>
> --
> John Honniball
>
>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>


[Non-text portions of this message have been removed]

----- Original Message ----- 

From: "John Honniball" <anachrocomputer@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, September 14, 2008 2:29 PM
Subject: [Homebrew_PCBs] Toner Tansfer PCB photos


>I recently made my first Toner Transfer PCB, and I have some photos on
> Flickr, here:
>
> http://www.flickr.com/photos/anachrocomputer/sets/72157607180910289/
>

I've just designed something similar using the new PIC18F24J10, but my board 
is all SMT, with just 7 wire links:

http://www.leonheller.com/Designs/PIC18F24J10_Proto.gif

I've made a PCB (photo etch) and will be testing it later.

The next one I make will use the 44-lead QFP 18F45J10. I'll add some 
additional pads to that for SO-23 transistors etc.

Leon
--
Leon Heller
Amateur radio call-sign  G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

What functions do the wire links near C5 and R1 serve? Couldn't you just
connect those directly?

ST

On Sun, Sep 14, 2008 at 7:52 PM, Leon <leon355@...> wrote:

>
> I've just designed something similar using the new PIC18F24J10, but my
> board
> is all SMT, with just 7 wire links:
>
> http://www.leonheller.com/Designs/PIC18F24J10_Proto.gif
>
> I've made a PCB (photo etch) and will be testing it later.
>
> The next one I make will use the 44-lead QFP 18F45J10. I'll add some
> additional pads to that for SO-23 transistors etc.
>
> Leon
> --


[Non-text portions of this message have been removed]

----- Original Message ----- 

From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, September 14, 2008 7:09 PM
Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos


> What functions do the wire links near C5 and R1 serve? Couldn't you just
> connect those directly?

I like to have the connections around regulators fairly short, for 
stability. It probably doesn't matter, though.

Leon

--- On Sun, 14/9/08, Stefan Trethan <stefan_trethan@...> wrote:

From: Stefan Trethan <stefan_trethan@...>
Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos
To: Homebrew_PCBs@yahoogroups.com
Date: Sunday, 14 September, 2008, 5:34 PM

> Wow, didn't your eyes cross drilling all those holes?

Er, yes, it was a bit tedious!

> At first i thought you etched it on some kind of pre-drilled
> stripboard.. .

After a while, it did seem like I was etching my own Veroboard!

The next design will have fewer holes, promise.  And I'll use
fibreglass board, too.

-- 
John Honniball.

Me too, but if you pull the ground wire corner down right below C5 that one
link is freed up and the trace is the same length.
R1 could be connected directly to conn1, i would say.

Possibly it's just me, hating to solder unnecessary wire links or 0R
resistors.

ST


On Sun, Sep 14, 2008 at 8:17 PM, Leon <leon355@...> wrote:

>
> I like to have the connections around regulators fairly short, for
> stability. It probably doesn't matter, though.
>
> Leon


[Non-text portions of this message have been removed]

I think they punch veroboard, at least the cheap paper kind.

ST

On Sun, Sep 14, 2008 at 8:28 PM, John Honniball <anachrocomputer@...
> wrote:

>
>
> --- On Sun, 14/9/08, Stefan Trethan <stefan_trethan@...> wrote:
> From: Stefan Trethan <stefan_trethan@...>
> Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos
> To: Homebrew_PCBs@yahoogroups.com
> Date: Sunday, 14 September, 2008, 5:34 PM
>
> > Wow, didn't your eyes cross drilling all those holes?
>
> Er, yes, it was a bit tedious!
>
> > At first i thought you etched it on some kind of pre-drilled
> > stripboard.. .
>
> After a while, it did seem like I was etching my own Veroboard!
>
> The next design will have fewer holes, promise.  And I'll use
> fibreglass board, too.
>
> --
> John Honniball.
>
>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>


[Non-text portions of this message have been removed]

----- Original Message ----- 

From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, September 14, 2008 7:43 PM
Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos


>I think they punch veroboard, at least the cheap paper kind.

They aren't etched, either. I think they "plough" out the copper with a 
tool, like a shaper with metal.

Leon
--
Leon Heller
Amateur radio call-sign  G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

----- Original Message ----- 

From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, September 14, 2008 7:36 PM
Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos


> Me too, but if you pull the ground wire corner down right below C5 that 
> one
> link is freed up and the trace is the same length.
> R1 could be connected directly to conn1, i would say.
>
> Possibly it's just me, hating to solder unnecessary wire links or 0R
> resistors.

Thanks, I didn't notice that.

I had the DC connector the wrong way round, anyway. Correcting it on the 
layout removed that link, of course. The regulator was a dead short when I 
first tested it and was taking over 1A. Those little TO-92 devices are very 
robust, and it still worked when I turned the connector round.

The board works; I've just tried a test program on it

Leon

Well, the ones i use (if i can't avoid it) have round pads, not strips, so i
think they are etched.

ST

On Sun, Sep 14, 2008 at 9:11 PM, Leon <leon355@...> wrote:

> ----- Original Message -----
> From: "Stefan Trethan" <stefan_trethan@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Sunday, September 14, 2008 7:43 PM
> Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos
>
>
> >I think they punch veroboard, at least the cheap paper kind.
>
> They aren't etched, either. I think they "plough" out the copper with a
> tool, like a shaper with metal.
>
> Leon
> --
> Leon Heller
> Amateur radio call-sign  G1HSM
> Yaesu FT-817ND transceiver
> Suzuki SV1000S motorcycle
> leon355@...
> http://www.geocities.com/leon_heller
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>


[Non-text portions of this message have been removed]

----- Original Message ----- 

From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, September 14, 2008 9:57 PM
Subject: Re: [Homebrew_PCBs] Toner Tansfer PCB photos


> Well, the ones i use (if i can't avoid it) have round pads, not strips, so 
> i
> think they are etched.

I was thinking of the original Veroboard.

Leon