Jack DeVille Deuce Coupe

mmolteratx · Post by **mmolteratx** » 22 Mar 2013, 18:18

Got this one in on Wednesday and got around to tracing it last night. Think it's correct, but I'm not 100% on the boost control and the tone control. Also, the PIC part is pretty worthless for anyone who doesn't code, so replace the Q1 and 2 with a mechanical switch if you're gonna build it otherwise. Also of note is that the board is 4 layered, so all connections were sussed out with a multimeter's continuity function. I'll post the diagram I used to mark connections later.

Jack Deville · Post by **Jack Deville** » 22 Mar 2013, 19:32

Wow!

You're pretty good!!
Nice trace man.

Notes:
-Charge pump IC is an LT1054, rather than MAX1044
-Diode cathodes are connected to PIC rather than anodes.

Again, nice work man.

mmolteratx · Post by **mmolteratx** » 22 Mar 2013, 20:49

Jack Deville wrote:Wow!

You're pretty good!!
Nice trace man.

Notes:
-Charge pump IC is an LT1054, rather than MAX1044
-Diode cathodes are connected to PIC rather than anodes.

Again, nice work man.

Ah yea, forgot to change the naming when cleaning it up. I think the diodes are a screw up from copying my hand notes, but I threw them away after redrawing so I dunno if I got them right initially or not. Thanks for the corrections.

New schem is attached.

I quite like this one as well. Nice range to the tone control. Useable all the way up and all the way down. Just wish it had a bit more gain, so I might put a 100k pot in for the gain control. Healthy amount of output for hitting the input of my amp as well. Doesn't seem to like hot pickups as much as single coils and PAF types, but I find that the norm with soft clippers, at least for my purposes.

NOC3 · Post by **NOC3** » 23 Mar 2013, 19:54

Cool use of the boost mosfets and microchip!

So the player just double taps for a different mode? Nice work on saving a foot switch, real estate and still giving two functions. Wondering what the easiest range of tap times is to be able to hit on the fly while still being quick enough to allow fast bypass on/off action for short passages between clean and dirty. I'm assuming you allow it to stay in ultra boost mode while bypassed and it engages back in ultra mode?

I'm learning code for the sole reason of getting rid of my 3pdt stomp switches.

Jack Deville · Post by **Jack Deville** » 23 Mar 2013, 22:31

NOC3 wrote:Cool use of the boost mosfets and microchip!

So the player just double taps for a different mode? Nice work on saving a foot switch, real estate and still giving two functions. Wondering what the easiest range of tap times is to be able to hit on the fly while still being quick enough to allow fast bypass on/off action for short passages between clean and dirty. I'm assuming you allow it to stay in ultra boost mode while bypassed and it engages back in ultra mode?

I'm learning code for the sole reason of getting rid of my 3pdt stomp switches.

The manual details the operation of the switching system:
http://jackdeville.com/jackdeville/manu ... manual.pdf

Its much easier and more intuitive than it would seem. Essentially:
-One tap to engage/bypass
-Two taps to toggle between Ultra and Drive

If you are up for a fun exercise, draw up the truth tables, state diagrams and k-maps for the system. Its not too bad with only three states.

You will see the logistical challenges involved with a system like this.

And thanks for the compliment! I think the MOSFET application is pretty cool too.

n8b5150 · Post by **n8b5150** » 23 Mar 2013, 22:35

I picked up one of these guys up on a whim and it has become my favorite "only pedal in front of the amp" OD. It also stacks well (I'm currently stacking a blues driver and gainster in front of it). Kudos on a great sounding pedal.

Jack Deville · Post by **Jack Deville** » 23 Mar 2013, 22:54

Thanks man! It's a neat circuit. I'm glad you're enjoying it. My best friend uses his for his bass. Sounds retarded.

mmolteratx · Post by **mmolteratx** » 24 Mar 2013, 06:46

NOC3 wrote:Cool use of the boost mosfets and microchip!

So the player just double taps for a different mode? Nice work on saving a foot switch, real estate and still giving two functions. Wondering what the easiest range of tap times is to be able to hit on the fly while still being quick enough to allow fast bypass on/off action for short passages between clean and dirty. I'm assuming you allow it to stay in ultra boost mode while bypassed and it engages back in ultra mode?

I'm learning code for the sole reason of getting rid of my 3pdt stomp switches.

Coding a microcontroller for bypass is actually relatively easy. Decided to learn how to program a PIC last weekend and am just waiting on 509s to load the program on, and the only problem I can see is that my delay times are too short, though those are very easy to tweak, especially the way I've got it set up. Though I had quite a bit of assembly experience before I decided to learn how to work with a microcontroller, so non-EE/CS majors might take a bit longer. Might be willing to post my program once I've verified it.

Jack Deville · Post by **Jack Deville** » 24 Mar 2013, 09:54

Coding is easy. Determining what to code and how to code it, that's the tricky part.

mrkaploca · Post by **mrkaploca** » 25 Mar 2013, 12:36

What does Q3 serve for? Muting?

mmolteratx · Post by **mmolteratx** » 25 Mar 2013, 16:38

mrkaploca wrote:What does Q3 serve for? Muting?

Yea, pulls the output to ground during switching pulses. Pop prevention.

mrkaploca · Post by **mrkaploca** » 25 Mar 2013, 17:25

What about mosfet body diode? This kind of configuration starts clipping signal above 0.4V. I suppose it could go with this particular circuit (as this is a clipping circuit) but if it's a part of Deville clickless system, i don't thing it would be a wise thing to use mosfet as a switch...

Greenmachine · Post by **Greenmachine** » 26 Mar 2013, 21:52

Good looking pedal Jack. Way to go.

mrkaploca · Post by **mrkaploca** » 14 Apr 2013, 22:10

mmolteratx wrote:

Ah yea, forgot to change the naming when cleaning it up. I think the diodes are a screw up from copying my hand notes, but I threw them away after redrawing so I dunno if I got them right initially or not. Thanks for the corrections. New schem is attached.

So are cathodes or anodes connected to PIC? Jack stated it's cathodes, but your new schem. states it's anodes...

jsrfo · Post by **jsrfo** » 30 Jul 2013, 13:59

Can anyone tell me what P$1 and P$6 represent? Also, I do not see the Takamisawa relay on the schematic. Any help would be great.

Whalestone · Post by **Whalestone** » 05 Aug 2013, 13:19

jsrfo wrote:Can anyone tell me what P$1 and P$6 represent? Also, I do not see the Takamisawa relay on the schematic. Any help would be great.

I believe P$1 and P$6 are connected to the coil of the relay.

freq67 · Post by **freq67** » 05 Aug 2013, 14:16

I have to say Jack's Layouts are always sick....love this one...very clean.

mmolteratx · Post by **mmolteratx** » 09 Aug 2013, 07:06

jsrfo wrote:Can anyone tell me what P$1 and P$6 represent? Also, I do not see the Takamisawa relay on the schematic. Any help would be great.

P$1 and P$6 are +/- of the relay coil. Was too lazy to rename them when creating the part.

lukatosh · Post by **lukatosh** » 11 Aug 2013, 03:12

Hello!

from what i've understand...
Q1 and Q2 works as a switch to activate the boost function of the pedal?

can I implement that using a 3pdt??

i can omit Q3, R11 and C7 since this components works as a switching pop prevention ?

Please, excuse my bad english, thanks so much!

Jack Deville · Post by **Jack Deville** » 11 Aug 2013, 05:30

Yes and yes.

Jack DeVille Deuce Coupe [traced]