This Week on the Breadboard: The 'lectric Mama Flanger
- Thread starter Chuck D. Bones
- Start date
Chuck D. Bones
Circuit Wizard
I measured the clock freq range on my breadboard.
Fmin = 28.7KHz
Fmax = 272KHz
Those clock frequencies produce a BBD delay time (td) from 1.88ms to 17.8ms.
Flangers produce a series of notches in the freq response. The lowest freq notch occurs at 2 / td. The higher freq notches occur at odd multiples of the 1st notch freq. For instance, with Fclk = 51.2KHz, td is 10ms and the notches are at 200Hz, 600Hz, 1KHz, 1.4KHz, 1.8KHz, 2.2KHz, 2.6KHz, etc.
The bottom end of the RANGE control produces enough delay to get into the chorus range. Bumping C29 up to 680pF or 1nF will produce a stronger chorus effect. Be aware that slower sample rates produce more distortion and noise.
This article is worth a read:
https://www.sweetwater.com/insync/chorus-flange-and-phase-pedals-difference/
Fmin = 28.7KHz
Fmax = 272KHz
Those clock frequencies produce a BBD delay time (td) from 1.88ms to 17.8ms.
Flangers produce a series of notches in the freq response. The lowest freq notch occurs at 2 / td. The higher freq notches occur at odd multiples of the 1st notch freq. For instance, with Fclk = 51.2KHz, td is 10ms and the notches are at 200Hz, 600Hz, 1KHz, 1.4KHz, 1.8KHz, 2.2KHz, 2.6KHz, etc.
The bottom end of the RANGE control produces enough delay to get into the chorus range. Bumping C29 up to 680pF or 1nF will produce a stronger chorus effect. Be aware that slower sample rates produce more distortion and noise.
This article is worth a read:
https://www.sweetwater.com/insync/chorus-flange-and-phase-pedals-difference/
Last edited:
Bricksnbeatles
Member known well
I’ve just realized that the tapLFO lacks the offset CV of and depth CV inputs of the stompLFO, which are arguably the most important controls to have in a flanger, so while the additional 8 waveforms, wave-shaping ‘distort’ feature, and tap tempo subdivisions would be nice to have, it would be much more trouble to adapt to Chuck’s design than I initially was thinking about.
The stompLFO also has double the max speed of the TapLFO, so that’s pretty cool.
cooder
Well-known member
What. A. Crazy. Mofo.
In the best sense of the word.
Dial on the wave knob and it takes you through weird and wonderful whacky worlds of flanging LFOs, I wasn't quite prepared for how whacky it can get, lol....
Of course there's the more 'normal' flanger sounds as well that I better start myself off with to get fully into it, and yes having the blend knob is definitely a good move to be able to get it calmed down a bit.
The colour knob makes a massive difference too and dialing the top range of that with internal trimmer is important; it scared the beejezuz out of me first when I dialed that up and got into feedback zone.
Awesome design, mad genius I'd say. And I'm glad I had another spare 3102 left here after Chuck hooked me up (via a generous you know who person here) to a 3207 as well.
It's all go, hold on to the swoosh and swirl. Time to celebrate with a bit of photobombing.
As you can see in the gutshots she's a bit of a tight affair in there, I had two caps mounted underneath board and the inductor was meant to go underneath as well. However, I had only a 1000uH inductor which measured on the CCCT 840uH. I might replace that with a closer to optoimum 750uH when I get some.
Thanks so much for the awesomesauce projects here, all hail Chuck and the Boneyard me thinks.
In the best sense of the word.
Dial on the wave knob and it takes you through weird and wonderful whacky worlds of flanging LFOs, I wasn't quite prepared for how whacky it can get, lol....
Of course there's the more 'normal' flanger sounds as well that I better start myself off with to get fully into it, and yes having the blend knob is definitely a good move to be able to get it calmed down a bit.
The colour knob makes a massive difference too and dialing the top range of that with internal trimmer is important; it scared the beejezuz out of me first when I dialed that up and got into feedback zone.
Awesome design, mad genius I'd say. And I'm glad I had another spare 3102 left here after Chuck hooked me up (via a generous you know who person here) to a 3207 as well.
It's all go, hold on to the swoosh and swirl. Time to celebrate with a bit of photobombing.
As you can see in the gutshots she's a bit of a tight affair in there, I had two caps mounted underneath board and the inductor was meant to go underneath as well. However, I had only a 1000uH inductor which measured on the CCCT 840uH. I might replace that with a closer to optoimum 750uH when I get some.
Thanks so much for the awesomesauce projects here, all hail Chuck and the Boneyard me thinks.
giovanni
Well-known member
Which PCB is that? Some existing flanger board that you used to build Chuck’s circuit?!?What. A. Crazy. Mofo.
In the best sense of the word.
Dial on the wave knob and it takes you through weird and wonderful whacky worlds of flanging LFOs, I wasn't quite prepared for how whacky it can get, lol....
Of course there's the more 'normal' flanger sounds as well that I better start myself off with to get fully into it, and yes having the blend knob is definitely a good move to be able to get it calmed down a bit.
The colour knob makes a massive difference too and dialing the top range of that with internal trimmer is important; it scared the beejezuz out of me first when I dialed that up and got into feedback zone.
Awesome design, mad genius I'd say. And I'm glad I had another spare 3102 left here after Chuck hooked me up (via a generous you know who person here) to a 3207 as well.
It's all go, hold on to the swoosh and swirl. Time to celebrate with a bit of photobombing.
As you can see in the gutshots she's a bit of a tight affair in there, I had two caps mounted underneath board and the inductor was meant to go underneath as well. However, I had only a 1000uH inductor which measured on the CCCT 840uH. I might replace that with a closer to optoimum 750uH when I get some.
Thanks so much for the awesomesauce projects here, all hail Chuck and the Boneyard me thinks.
Chuck D. Bones
Circuit Wizard
Cooder designed the board and the graphics. Excellent work, as always!
jeffwhitfield
Well-known member
Me want! Where can I get a PCB for that? Lovely work! 
Chuck D. Bones
Circuit Wizard
Finally got mine boxed up. Had to fix a few dodgy solder joints 
The LED is one of those multi-color goodies that slowly fades from one color to the next. Nice job on the artwork, Brett!
The BBD & LFO chip are socketed.
The LED is one of those multi-color goodies that slowly fades from one color to the next. Nice job on the artwork, Brett!
The BBD & LFO chip are socketed.
Chuck D. Bones
Circuit Wizard
This is one of the ways they simulated a Leslie in the olden times. Uni-Vibe is another.
https://generalguitargadgets.com/pdf/ggg_leslie_sim.pdf
https://generalguitargadgets.com/pdf/ggg_leslie_sim.pdf
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