Analog VCO-first thing-octave select-rotary switch question
I updated the blog post: at least part of the problem is the switch. I should probably try to find one of higher quality, I am pretty sure if you heat up the ones I got from bang good even a tiny bit...
View ArticleCEM3340 VCO LMNC
Frequency Central PSU is alive! :cry: LMNC update cem3340 layout isn't 100%.... My waveform outputs (Triangle, sawtooth, and ramp) are humming :D but my frequency pot isn't working. Tried adjusting the...
View ArticleCEM3340 VCO LMNC
Frequency Central PSU is alive!ut that will be amazing. I'm assuming the ic's are getting hot cause of a short somewhere. I did check my PSU is providing 12v/-12v. Hunt the continues! Master P:I...
View ArticleAnalog VCO-first thing-octave select-rotary switch question
[quote="PHOBoS"] I like the idea of using the resistor arrays, you could use one with 8 so you don't need the seperate resistor.And yeah they are quite tricky to solder. Thanks Phobos. Good advice as...
View ArticleCEM3340 VCO LMNC
Project, do you have a picture or diagram of your board? I have just finished building the LMNC VCO based on his diagram and was able to get it to work *mostly*. The square wave is not very flat and PW...
View Article4x4 VCA Matrix on 5x stripboard
also, some schematics would be nice...can't check for errors without schematics
View ArticleADSR by nicolas3141 - fonik redraw scheme
hi mate,the the purpose of the gate in being constantly switched on when not plugged in, could be that by doing so you have a defined state of the gate inputand, almost certain it has to do with the...
View ArticlePT2399 Circuits?
Hi CyclicYou are right. I actually meant to link to the PT2399 VC on Joe's github (and yes this one is not the eagle files but for diy etching): https://github.com/jbeuckm/ScottBernardi-VCdelay-PCBI...
View ArticleCEM3340 VCO LMNC
Now if anyone can explain why the PW pot would cause a cutoff at low and high values I'd be able to put this issue to bed. Currently adding the tri to sine based on the design in this thread. \My...
View Article808 Bass Drum Clone Eagle PCB & CNC Gcode
HiQuestion about the midi cv drums, can this be used with normal midi devices or do I need to have something else? Not familiar with the sysex messages. Can I example trigger these with my MPC via...
View ArticleAnalog VCO-first thing-octave select-rotary switch question
https://audiodiwhy.blogspot.com/2020/01/3340-vco-finished.htmlEnded up using 4x SMD .1% resistors in array and 1 extra high performance SMD, but the 1 extra wasn't needed at the end of the day. Also...
View ArticleAnalog VCO-first thing-octave select-rotary switch question
Looking very nice. Good work.Last time I've finished two Skull & Circuits VCO1 (3340 based with octave switch and lot of outputs) but as usual I lost my time modding them to get proper stable...
View Articlebasic volt per octave keyboard schematics
I’m still using that final schematic of this in my key pedals, never could get it to tune right for more that 3 octaves, but it’s great for what I use it for now.
View ArticleCEM3340 VCO LMNC
[quote="rockprada" I've got a lot more time on my hands with the current shutdown in Michigan. [/quote]Prada: Yeh tons of time on our hands eh!I don't/can't stripboard....I am too crappy at it....but I...
View ArticleCEM3340 VCO LMNC
So I found an updated actual schematic from lookmumnocomputer and it has a handful more resistors added in the PWM circuit. I was able to modify my layout to show what worked for me. The biggest issue...
View Article4017 Baby Sequencer Stripboard
:welcome: :partyguy:What you are experiencing is most likely the result of a floating (unconnected) input. One of the 'rules' when using CMOS chips isto never leave an input unconnected (unless you...
View Article4017 Baby Sequencer Stripboard
:welcome: :partyguy:What you are experiencing is most likely the result of a floating (unconnected) input. One of the 'rules' when using CMOS chips isto never leave an input unconnected (unless you...
View Article[veroboard] 3 in and 3 out matrix mixer with buffered inputs
Thanks for posting that schematic. I'm actually interesting in building one my self and I've got a question regarding the buffered 4.5v. How you create it ? What I mean is that in order to make this...
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