Search found 69 matches

by commathe
10 Sep 2014, 06:44
Forum: DIY Stompbox designs
Topic: Class-A JFET / Triode Exaggerator
Replies: 47
Views: 15364

Re: Class-A JFET / Triode Exaggerator

Curious, will definitely give it a try!
by commathe
20 Aug 2014, 01:56
Forum: DIY Stompbox designs
Topic: Square to triangle wave conversion
Replies: 7
Views: 2745

Re: Square to triangle wave conversion

Interesting! Didn't know that relation. Thanks!
by commathe
18 Aug 2014, 05:04
Forum: DIY Stompbox designs
Topic: Square to triangle wave conversion
Replies: 7
Views: 2745

Re: Square to triangle wave conversion

You could use an integrator (an active low-pass filter without DC feedback). Though higher frequencies will create quieter outputs and lower frequencies might clip. Worth a try though!
by commathe
11 Aug 2014, 00:56
Forum: DIY Stompbox designs
Topic: Raygun Youth Chaos Fuzz
Replies: 34
Views: 17570

Re: Raygun Youth Chaos Fuzz

A bunch of 4046s just arrived. It feels like a sign. It was meant to be
by commathe
03 Jul 2014, 01:59
Forum: DIY Stompbox designs
Topic: Building A 4558 opamp from scratch.
Replies: 20
Views: 9734

Re: Building A 4558 opamp from scratch.

I find it tough to believe a discrete component op-amp will be better. You are adding in so many levels of inaccuracy and component variation that I am highly skeptical it will *imporve* performance. That Burson discrete op-amps page made me facepalm so hard for so many reasons. It was the "let it b...
by commathe
11 Jun 2014, 02:15
Forum: Ready-To-Build Effect Projects
Topic: Generic I/O board for pedals, with bistable relay [verified]
Replies: 52
Views: 4680

Re: Generic I/O board for pedals, with bistable relay [verified]

:applause: Fantastic! Good effort, and thanks for the code! I'll definitely be studying it.
by commathe
05 Jun 2014, 03:33
Forum: DIY Stompbox designs
Topic: Servo Offset Biasing for JFETs
Replies: 29
Views: 10390

Re: Servo Offset Biasing for JFETs

Bump. Did you breadboard this? Did anyone? I am hungering for a way to bias jfets automatically. Also, it's fascinating to think about this stuff from a technical stand point. Really interesting design!
by commathe
06 May 2014, 03:51
Forum: Ready-To-Build Effect Projects
Topic: Another Optical Compressor
Replies: 51
Views: 3158

Re: Another Optical Compressor

For some reason I can not see the original schematic. I think the host is blocked in my country. Could someone re upload it?
by commathe
04 May 2014, 12:29
Forum: Boutique Stompboxes dissected...
Topic: Death By Audio - Robot [traced]
Replies: 176
Views: 44865

Re: Death By Audio - Robot [traced]

Awesome! Definitely going to try this out!
by commathe
24 Apr 2014, 07:14
Forum: Boutique Stompboxes dissected...
Topic: Way Huge Echo-Puss
Replies: 0
Views: 840

Way Huge Echo-Puss

Any interest in gut shots of this? Made of a main board and a two separate ones for the switch and another the jacks and power inputs. Main board is two sided with a combination of surface mounted and through hole bits. Can't tell if it is more than two layers. May be a few days (possibly Monday) be...
by commathe
24 Apr 2014, 01:05
Forum: Boutique Stompboxes dissected...
Topic: Death By Audio - Robot [traced]
Replies: 176
Views: 44865

Re: Death By Audio - Robot [traced]

Which makes it all the more frustrating. I have 8 chips, 3 of them are giving me the same oscillation issue which makes me feel like I must have made a mistake that my quadruple checking isn't catching.
by commathe
23 Apr 2014, 05:13
Forum: Boutique Stompboxes dissected...
Topic: Death By Audio - Robot [traced]
Replies: 176
Views: 44865

Re: Death By Audio - Robot [traced]

Interesting. I thought about trying out that method but wasn't sure if it'd work. I thought the resistor between "true" ground and -3.6v was needed for something special. I feel like a voltage regulator would provide slightly more reliable results though. I can't even tell if my issues are arising f...
by commathe
23 Apr 2014, 02:35
Forum: Boutique Stompboxes dissected...
Topic: Death By Audio - Robot [traced]
Replies: 176
Views: 44865

Re: Death By Audio - Robot [traced]

I'm definitely going to try out your method. Been having a nightmare with this pedal. Still haven't got it off the breadboard.
by commathe
16 Apr 2014, 03:09
Forum: Ready-To-Build Effect Projects
Topic: "Little Angel" - Super Simple PT2399 Mini Chorus
Replies: 357
Views: 26623

Re: "Little Angel" - Super Simple PT2399 Mini Chorus

Isn't the Vref pin into the op-amps? How come that simulates the power being switched on and off?
by commathe
15 Apr 2014, 05:15
Forum: Boutique Stompboxes dissected...
Topic: Bondi Effects - Sick As Overdrive
Replies: 24
Views: 14552

Re: Bondi Effects - Sick As Overdrive

I like the graphics. It's nice to see something that is aesthetically pleasing for once.
by commathe
14 Apr 2014, 06:07
Forum: Ready-To-Build Effect Projects
Topic: "Little Angel" - Super Simple PT2399 Mini Chorus
Replies: 357
Views: 26623

Re: "Little Angel" - Super Simple PT2399 Mini Chorus

Can anyone help me understand how this chorus works? I don't understand how the PT2399 is working in this circuit and I don't get how it even creates the chorus sound :(
by commathe
14 Apr 2014, 01:43
Forum: Debugging
Topic: HT8950 (DBA Robot) oscilating/whining?
Replies: 0
Views: 1588

HT8950 (DBA Robot) oscilating/whining?

Has anyone else here had issues with this or know what might cause it? I have built it off the attached schematic. However, on my breadboard all I get is a whine that vaguely interacts with the guitar but completely overpowers it. It does a bunch of weird things like stops making sound when I play c...
by commathe
05 Apr 2014, 12:22
Forum: Boutique Stompboxes dissected...
Topic: Death By Audio - Robot [traced]
Replies: 176
Views: 44865

Re: Death By Audio - Robot [traced]

I breadboarded this one up but I am getting a very weird high pitch squeal that is adjustable with the degrade/robot knob. It totally drowns out any guitar signal going in. It also seems if I disconnect one of the three pins (12/13/14) from the little network it stops, but then the chip stops output...
by commathe
17 Mar 2014, 01:28
Forum: Modern Stompbox Effects (1975 - ...)
Topic: MESA Grid Slammer tracing (schematic and vero layout inside) [schematic]
Replies: 24
Views: 11749

Re: MESA Grid Slammer tracing (schematic and vero layout ins [schematic]

Has anyone figured out what diffrence connecting the middle of the two sets of clipping diodes (a la Timmy) has yet? I'm really curious about that choice as it seems pointless to me.
by commathe
06 Mar 2014, 03:40
Forum: Boutique Stompboxes dissected...
Topic: TC Electronic - Spark Booster [traced]
Replies: 46
Views: 17508

Re: TC Electronic - Spark Booster [traced]

Awesome! I had been looking for this.