Christine!!!

[Matthew Sanford]

Just put together a Christine (thank you The Tone God!!!) on the breadboard! I tried Taylor's way but was glitching so threw in the buffers before noticing a wire missing from gain to tone, threw it in and...I LOVE THIS THING!!! Personifies that car really well!

I did run LFO & inverted to all pots but the volume (could make it tremolo), realized I can do a bus for each jack to switches to choose invert, non, or off, or just half the volume/tone pots. Even more insanity! It'd even cut out at times (the Power Starve I think) and sweep the oscillation frequency.

Really though I'm posting about thoughts on housing. At first (and kind of still) I'd thought a die cast '58 Plymouth Fury would be amazing, but a friend said like a paperback book. I was thinking (spoiler alert) on the scene she's on fire painted on top. I was thinking on/off LEDs for the headlights and LFO LEDs diffused across the front to light up the flames...but how? Maybe a sheet of clear plastic with aluminum foil shiny down cut and painted like the rest of it? Time to experiment I guess

[GGBB]

https://reverb.com/ca/item/38922401-icmpedals-christine-overdrive-pedal

[ElectricDruid]

https://reverb.com/ca/item/38922401-icmpedals-christine-overdrive-pedal

Undeniably funky!

[Phend]

Hum, from Parasit Studio "Here's an interesting fuzz if you like noise " 

[Matthew Sanford]

Hum, from Parasit Studio "Here's an interesting fuzz if you like noise " 

That's the vero layout I'm using, plus putting the TL072 back in...maybe a couple LM358 to buffer and invert each LFO. Is there a simplish way to warp the LFO through the op amp? Would be cool to get 4 instead of just 2.

And that Reverb pedal is what my original thought was! Except on fire, naturally.

[GibsonGM]

Sound clips?   

[FiveseveN]

Sound clips? 

You got one in reply #3 and here's another:

I'm convinced

[Matthew Sanford]

Sound clips?   

I put it on vero already and didn't get any before. Working out the off board stuff, daughter boards for vactrols with pots, maybe switches mounted top side with LEDs in 1/8" clear plastic with a cut out of the car on top, each glowing towards the pot, gain and volume on the bottom like tires. Am thinking a switch to take the buffer in/out, and a momentary to throw a global feedback 1M (if buffer is on) to tame the beast.

Hoping to get it all figured this weekend and mounted in a box!

[GibsonGM]

That IS insane...at 2:10, man, that's wooly, ha ha.  I didn't see the small vero below, thought the fuzz was a different ckt from the Christine.   Glitchy!   

[duck_arse]

.... plus putting the TL072 back in .....

what now? you'd be showing us that circuit diagram, wouldn't you?

and does it have to have green knobs?

[Matthew Sanford]

.... plus putting the TL072 back in .....

what now? you'd be showing us that circuit diagram, wouldn't you?

and does it have to have green knobs?

https://www.thetonegod.com/diy/christine



I am putting it together as The Tone God had divined, though I used the vero layout Phend had shared which is Taylor's unbuffered version...sadly that PCB was the one he was out of.

I am soldering dip switches and LEDs to send LFO to vactrols on each pot, gonna be more wires than I want but Gibson I'll make the glitchy madness into waves!

Uh...I should get soldering

[ElectricDruid]

Is there a good reason why the input buffer op-amp has no bias at all, or is it simply that the thing is so random anyway that who cares? 


Edit: Or the output buffer, come to that.

[Matthew Sanford]

Is there a good reason why the input buffer op-amp has no bias at all, or is it simply that the thing is so random anyway that who cares? 


Edit: Or the output buffer, come to that.

That, my good sir, is a question for The Tone God. My guess is the 4066 turns low voltage high, though seems a lot of feedback networks here. I know Taylor said he omitted it so his volume/tone knobs influence the circuit. I want both options so maybe a couple dpdt switches.

Here's where I'm at so far (soldering). The switch board has led on/off to the tune of the CV, needs wires to the CV jacks (2) and the pots-should be mounted on top. The thing with vactrols will have 3 pots, wires to the circuit and to the switches. All the CV voltage stays out of the circuit...and i need to get ones for gain and volume knobs. On the main board I need to add the buffer chip, so much room I was thinking some latching logic flip flop and momentaries for all the switching but...maybe v2.

Gotta run do things but hell bent to finish!

[duck_arse]

this is one of those very rare circuits designed using the E1 range. if the 4049 were replaced with a 4011, we could even get rid of 2 more numbers.



from listening to those clips, and if you are using opamps front and rear [with the required bias], it might be an idea to use the opamps to de/emphasise, maybe cut some the hiss.

[Matthew Sanford]

Just wanted to add a poor pencil full schematic. Only 12 more solders and one correction left! The way I've built it doesn't have the buffer on/off switch or the global feedback taming momentary. Both of those have 1M resistors left floating - the buffer has from ground to switch, the global has from output to switch. The latter I figured is better to float from the output rather than the inverting input...it'd be an antenna, right? Any other issues doing it this way?

And sounds will come soon!

[duck_arse]

...... but you will add a bias network for the opamps, won't you.

[antonis]

if you are using opamps front and rear [with the required bias],

but you will add a bias network for the opamps, won't you.

What a persistent guy..!!!

[Matthew Sanford]

...... but you will add a bias network for the opamps, won't you.

Not yet...but maybe I should? Vero is not affectionate to me (currently low guitar makes it through with plenty of radio) so I'm thinking to put it back on breadboard for sound samples, plus just got some optos to build Rring's super simple ring mod, so more things to mess with together

[antonis]

Not yet...but maybe I should?

I think so..

Even if op-amps are fed from symmetrical supply, AC coupling caps need a path to discharge..

[Matthew Sanford]

Makes sense. I left work extra early, just found the input ground wire broke off ( must've stripped a little too hard) so fixing that took care of radio. Found I'd misplaced the wire to the 4066 so fixed that. Now input buffer is low on both inputs but ramps up to 8v on the out, and all 3 on the output buffer sit at 8v. Also, the signal is distorted and low on the output of the input buffer. I'm sure I've got errors to find.

On that note I'll set it aside, breadboard and see if Vb makes a difference (it worked in proper fashion without, but...), and set a couple more to mess with together. Better off that way as my LFO box isn't right, too fast and leaning on one side. I already have a StompFLO on the board, maybe do a OneShot too so I can try what Mark talked about...should clear off the storage areas of the board too