2011 Build Pictures

[TekniK]

Damn,thats awesome,congratulations !

It realy asks to be touched,nice design

[loydb]

[jordroid]

[quote="loydb"

Do you have a pcb and/or scheme for this that you'd share? Thanks![/quote]

Well, i did it in my usual disorganized way by breadboarding Ray's circuit and then tweaking it till i liked it, and then transfering the breadboarded circuit straight to perfboard without taking proper notes. When i say based on Ray's design i mean it's mostly his exactly, with just a few changes.

If i remember correctly i added a gain potentiometer to the front and a comparator wired to light up an led when the input signal was right around +/- 5 volts so i would have a visual indication of when the signal was at the desired level.

I also messed with the values around the gate circuit to get it to trigger reliably with my guitar, i never became super happy with it, mostly because i have a hard time playing consistently enough, not because of circuit deficiencies.

As is the levels of the pulse and sub pulse were a bit lower than +/- 5 volts, i don't remember if i did anything about that or not, i know i thought about it. Changing R48 and R49 (from the sub commander schematic) should alter the level of the pulse and sub pulse if desired. As a stand alone guitar effect it's probably not necessary but i wanted it to interface nicely with modular gear.

I used the opamp calculators and comparator calculator on Ray's site a bunch, and then just breadboarded to taste. I will add that i am fairly new to this and don't know if what i've done is anywhere near "best practice", or closer to "design nightmare", but if you want anything more specific i could pretty easily pull that module out and try to figure out exactly what i did.

[droffset]

Here's something I made for that 555 design contest. It was really fun to make and I learned a lot on the fly while doing it.



555 contest entry by drOffset, on Flickr


555 contest entry by drOffset, on Flickr

[TekniK]

[iorobyy]

midi arp2600 clone with some genuine original arp submodule inside
1 x arp 4027
1 x arp 4034
1 x arp 4074
1 x arp 4012
the other circuiteries are cloned by original arp schematics
plus a belton reverb section , a og2 delay module section, and a real tube
distortion section.

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[loydb]

Oooooo. I love the 2600. Somewhere down the road I want to build a 2600 clone as well, nice work.

[TekniK]

wow very nice those arp panels

[dougseidel]

Some of my favorites right now:

Fritz Jerkster
Wogglebug
MFOS VCF
Dual MFOS VC LFOs
Bi'n'tic filter/osc (Bridechamber version)
1/4 phone-to-banana interface
(power supply in the back)

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[TekniK]

i like the dual lfo look

[jordroid]

Here is a "just for fun" project. My brother gave me a literal bucket full of tiny momentary switches someone was tossing out, and i wanted to do something with them. It's a 3 octave single buss keyboard using Ray Wilson's design. The lowest octave is the bottom row, highest on top, with the two middle "C" notes appearing twice. Inside the box is just the switch/100r resistor part, it connects to the "brain" part with a TRS 1/4" cable. Ultimately i want to use it in a pre patched synth with an Acoupel CV recorder/sequencer as a remote control for programming sequences, and for directly playing in a twitchy/video game button mashing kind of way. I was a little bit worried that it would have issues with glitchy triggering, but it works great!

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[adambee7]

that would be great to add to a sequencer aswell.

[Boogdish]

My arpeggiator prototype. Controls are (left to right, from top left):

-Reset (goes to root note and restarts clock)
-Movement (Up/down, up repeating, down repeating, pendulum, up non-repeating, down non-repeating, random)
-Chord to arpeggiate(Major, Minor, Major 7, Minor 7, Maj 7 w/o 5th, Min 7 w/o 5, 1 + 5, Octaves)
-Range (Selects between 1 and 5 octaves)
-Tempo
-PWM for the gate out
-Tempo modulator attenuator
-PWM modulator attenuator
-Tempo mod in
-PWM mod in
-Gate out
-Trigger out
-CV in
-CV out

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[dougseidel]

Boogdish: I like the labels on this- do you etch right into those panels?

[emdot_ambient]

[kupfer_m]

The first of many....

Yusynth VCO

[Boogdish]

I finished two in a week! It's amazing what you can accomplish when you shun society!

It's a sequencer specialized for use as an EG. When fed a trigger, it goes through the sequence once, when fed a gate it will loop between points set by the switches below while the get is held down so you can get LFO-ish sustains.
Smooth control is your basic glide/portamento to make it less clicky, I made it variable as different amounts of smoothness will be needed at different speeds.
Time controls how fast it runs through the sequence, with an input and attenuator for external CV control.
Switches engage ping-pong mode for the loops and LFO simulates a gate permanently on.

On the bottom are two of Ian Fritz AR/AD circuits for when all that other stuff gets too complicated.

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[mark_olson]

Boogdish:

Your front panels are absolutely fantastic. How are you doing the lettering?

Really really nice!

I don't have the means or even the desire to make panels that are really "pretty", mine have a decidedly DIY look, but I wish I could make ones that really have balls like yours do.

Mark

[TekniK]

[Photon]

an electric engraver maybe? anyway it looks cool.

[Boogdish]

Oh, I meant to respond to Doug's comment in that last post but forgot. Thanks for the kind words, gents.

I engrave with a dremel, then spray paint black and sand off the excess spray paint, which also shines up the rest of the surface a bit. I'm still working on my engraving technique, I wish I had more control than I do now.

Also, I made a little video showing the ENV-SEQ. I apologize in advance for my crap camera work.

http://www.youtube.com/watch?v=mKvlIneAobA

[mark_olson]

[jordroid]

Boogdish, super cool envelope rig, i was thinking it was a 4017 sequencer (10 steps and all) except the forward/backward capability makes me think it's not, is it done with a pic, or...? Cool idea!

[Boogdish]

It's two chips, a 16F913 PIC and a quad op amp being used as an output buffer and voltage summer/limiter of the time CV. I'm sure it could be done using standard CMOS chips, but for me, it's easier to figure it out with a PIC.

I'm thinking about starting over with it and have the PIC read the values of the pots then output with the PWM or a standalone DAC. That way the PIC could do the filtering of between step voltages and have smoother transitions. I think I'd also have try having separate time controls for A/S/R.

[emdot_ambient]

Wow, I really like that, Boogdish! Very cool.