PCB layout for Ian Fritz' AD/AR EG

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Hi all

I recently did a pcb-layout of the simple little AD/AR circuit presented to the forum by Ian Fritz...here:

http://electro-music.com/forum/topic-21723.html&postorder=asc&highlight=envelope+generator+ian

He mentions an addon to it here:
http://electro-music.com/forum/topic-21723.html&postorder=asc&highlight=envelope+generator+ian&start=25

I built mine without the trun switch, but the pads are included on the layout.
The jumper betwen the opamp and the 4.7uf cap is where you mount one side of both pots - the other side goes to either the A or D, depending on whether you are wiring Attack or Decay. Solder the wiper to the A/D leg of the pot, and you've got longer A/D times turning the pot clockwise.

I used 1N4148 for the diodes, and added supply caps and 22R resistors on the supply as well (the Ken Stone trick).

Didn't provide pads for the x and y inputs found on the schem, but if you want to add the delayed pulser like Ian has it on his units, I guess you could just hang that off the leg of the 390K resistor going to +input of A1.
Haven't tried that myself though.

Hope this is useful to someone - it's my first layout contributed to this forum, so I'm kinda proud of it... Laughing

Best,

C

Edit: I should say: This layout is ready for Press and Peel.

Fritz AD-AR_overlay.GIF

Description:

Filesize:

50.95 KB

Viewed:

1176 Time(s)

This image has been reduced to fit the page. Click on it to enlarge.

Fritz AD-AR_bottom.GIF

Description:

Filesize:

33.47 KB

Viewed:

976 Time(s)

This image has been reduced to fit the page. Click on it to enlarge.

RF · Posted: Mon Feb 25, 2008 6:17 am Post subject:

Nice job - thanks for sharing this, Coriolis!

This is a nice circuit - I've got a pair of these in my newest cab and I them a lot.

bruce

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Thanks Bruce.

Yeah, I figured this was such an easy build, easy to use and low in panel real estate, that i had to try it.

For some reason I find ADSR's a bit confusing to use, or perhaps to much hassle to set up. I like to adjust envelopes a lot, and I feel the AD/AR types work better for me.

Perhaps I will do a layout for the delayed pulser as well, if it's ok with Ian?

C

frijitz · Posted: Tue Feb 26, 2008 10:05 am Post subject:

loss1234 · Posted: Tue Feb 26, 2008 10:35 am Post subject:

yeah for new pcb layouts!!

you workin on any other ones?

thanks to you and to IAN

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Wild Zebra · Posted: Wed Feb 27, 2008 1:13 pm Post subject:

Stereo panning mixer ehh. Is that the one with the general purpose mixer board?? As I was just getting ready to etch a few. Did you alter it in some was. I know it's got alot of area that doesn't get used.

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Hmm, to be honest I took that multipurpose layout, shaved some things off, added some of my own. I really need to correct a few things though - don't have time till after the weekend I'm afraid...

C

Wild Zebra · Posted: Thu Feb 28, 2008 9:17 am Post subject:

Cool I probably won't get around to it it till next week or so. I'll keep an eye out.

bugbrand · Posted: Sun Mar 02, 2008 11:03 am Post subject:

Hey,

Coriolis' PCB layout spurred me to do my own dual version last week (sorry, I don't mean to steal any of your thunder by adding my own layout!)

I've always been very keen on such EnvGens and this is a really great design - I'm gonna build a stack myself! I very much like compact layouts with pots mounted on board and this design really lent itself to a dual version. Its laid out for 16mm Alpha pots spaced by 0.8" (20.32cm) so fits nicely into my Frac system (or Eurorack).

I added LED indicators using standard transistor buffers and also included an extra switchable timing cap for each EG - I've yet to do my final value selections on these, but if you use holders you can always test things and select your favourite values (Ian's original schem specified 4u7)

I've done it up as a PDF with schematic redraw, parts placement and press'n'peel image. Of course its possible that the exact size of the PCB image may get scewed off somehow, so I'm attaching a hi-res TIF of the PCB too.

Enjoy! Many thanks to Ian for the great circuit!

FritzDualADAR_BuildDoc.pdf

Description:

PDF Build Doc for Fritz Dual AD/AR Env Gen - with redrawn schematic, parts placement and press'n'peel image

Download (listen)

Filename:

FritzDualADAR_BuildDoc.pdf

Filesize:

423.13 KB

Downloaded:

2306 Time(s)

Fritz_Dual_AD_AR_PCBImage.tif

Description:

Press'n'peel image at 300dpi (tif file) - just in case the pdf one gets mis-scaled or something...

Download (listen)

Filename:

Fritz_Dual_AD_AR_PCBImage.tif

Filesize:

2.34 MB

Downloaded:

1484 Time(s)

frijitz · Posted: Sun Mar 02, 2008 1:09 pm Post subject:

Good job!

Ian

6079smith · Posted: Sun Mar 02, 2008 1:37 pm Post subject:

Yes, thanks for these, guys.

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Ah yes! That's the stuff Tom! Cool

If you didn't have 2 units in one layout, I'd use yours instead of my own, but I have different plans for my panel layout...
I should mod mine for on-board pots as well, it's the obvious thing to do...

Very Happy

C

Sebo · Joined: Apr 27, 2007 Posts: 564 Location: Argentina

Thanks Coriolis, Bugbrand, and of cours Ian!!!
I think I would build a few of this in the future.
But lately my to-do list is growing too fast.

richardc64 · Posted: Mon Mar 03, 2008 2:48 pm Post subject:

Am I the only one who can't see the gifs and tif in this thread? I see empty attachment boxes.

Danno Gee Ray · Joined: Sep 25, 2005 Posts: 1351 Location: Telford, PA USA

The .tif image does not show for me. If I click on it, it does load in a new window and is viewable. The .gif images are viewable for me natively.

bugbrand · Posted: Wed Mar 05, 2008 3:06 am Post subject:

Cool and thanks for thanks and thanks to Ian! haha

Hey, so is the .tif not so much use to people? I could easily convert it to something else more standard - I just thought tifs were nice resolution.. Actually, I daresay jpeg would be just fine..

Ok, here it is again - 72dpi one and 600 dpi (I always wonder if that'd get resized? depends on software etc - confusion!)

Fritz_Dual_AD_AR_PCBImage_72dpi.jpg

Description:

Fritz dual AD/AR Press'n'peel image JPEG 72DPI

Filesize:

16.85 KB

Viewed:

51308 Time(s)

Fritz_Dual_AD_AR_PCBImage_600dpi.jpg

Description:

Fritz dual AD/AR Press'n'peel image JPEG 600DPI

Filesize:

329.16 KB

Viewed:

931 Time(s)

This image has been reduced to fit the page. Click on it to enlarge.

richardc64 · Posted: Wed Mar 05, 2008 8:58 am Post subject:

loss1234 · Posted: Sun Jun 29, 2008 10:28 am Post subject:

does anybody know how to increase the release time of this circuit? i like really long release times. does it matter how long of a gate it gets? or is the release time completely dependent on the timing cap size?

thanks

frijitz · Posted: Tue Jul 08, 2008 5:21 pm Post subject:

synthmonger · Posted: Tue Jul 08, 2008 5:35 pm Post subject:

Anything against using a 500k-2M pot for attack?

frijitz

RF · Posted: Tue Jul 08, 2008 5:53 pm Post subject:

Good news, Ian. Thanks Smile

The Bridechamber Threeler board was great.

frijitz · Posted: Tue Jul 08, 2008 6:41 pm Post subject:

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

Hmm...sounds interesting. I've been having trouble with my veroboard version of the delayed pulser (magic smoke coming out!), so maybe I should just spring for a couple of these boards to finally get that module done!

Will there be boardmounting of pots?

C