String pluck detector??

[slacker]

Sounds really cool. Looking forward to the updated schem, not that I'll understand it all.

[markusw]

Looking forward to the updated schem,

Will try to put it together this weekend...

not that I'll understand it all.

I think I should draw it a bit less confusing.....

Markus

[markusw]

Here's an updated schem including the LED/LDR gain control, programmable divider and sine generator.
I hope it's not too confusing....

http://www.aronnelson.com/DIYFiles/up/PLL_AMS100_PD_NE555_current_sch_31-03-07.pdf

Regards,

Markus

[rockgardenlove]

That's quite a schem you have there...impressive.

[StephenGiles]

Greetings from sunny Mar del Plata, Argentina!! That looks a very interesting circuit.

[markusw]

Greetings from sunny Mar del Plata, Argentina!! That looks a very interesting circuit.

Regards to Argentina  Have a nice holiday !

Markus

[markusw]

Here's nother update for the schem:

http://www.aronnelson.com/DIYFiles/up/Harmonic_Ring_Modulator_current_sch_15-04-07.pdf

Still missing: a two-band tone control. Any suggestions would be highly appreciated 

Next steps will be to make sine and sqaure wave blendable so you can have everything from pure sine to square wave as a carrier. Also a distortion stage a la Ring Stinger for the dry signal as well as some blend pots for mixing dry, ring mod, and maybe distorted guitar signal still have to be done......

I was already thinking about which controls might be useful with expression pedal and what other outputs to add as jacks (e.g. the AMS100 pluck detector ouput). Any ideas?

Will try to do some soundsamples for the sine octaves in combination with the RingMod next week.....


Regards,

Markus

[jrc4558]

Still missing: a two-band tone control. Any suggestions would be highly appreciated 

Although I'm utterly intimidated by the complexity of the schem (I'm just an amateur, amateur I tells ya!!!) I vote for Baxandall tone control, popularized by SansAMP, and seen i nthe schematic by Tonepad.com:  http://www.tonepad.com/project.asp?id=22

[toneman]

Hi M,
for a tone control-- i'd go 4 a PAIA 4730
it's a voltage controlled multimode filter..LowPass BandPass & HighPass.
all available at same time.!.  U can combine the HP & LP and make a NotchFilter also   
Sine waves have nothing to filter, but the SQuare waves certainly do.

As for pedal controls---
changing the fuzz changes the timbre of the RingModulation.
Since your carrier, now, is an octave multiple of the fundamental,
using a VoltageControlledFilter (VCF) will allow control via a pedal.   
So,....how about another 4730 here(??)  --after the fuzz...

Since U have most of the circuit(s) for an envelope follower, using an EF to "gate" the RingModulation
or the fuzz, might be interesting....(?)
Kind of like a hybrid of a Meatball-meets-RingO-thru-a-Filter-thingie...

I like the word "thingie" ......verrrrrry "technical".

How big did U say the pcb was going to be?    LOL!!!

afn

Tone

[markusw]

for a tone control-- i'd go 4 a PAIA 4730
it's a voltage controlled multimode filter..LowPass BandPass & HighPass.

I forgot to say I need a "simple" two band tone control 

I vote for Baxandall tone control, popularized by SansAMP,

Thanks for your vote  This one gets my vote too

The 4730 is too complex for my purpose. I want to finish that thingy soon. So additional modules will have to wait 
Nevertheless, thanks a lot for your help toneman!!

Sine waves have nothing to filter,

The voltage controlled low pass (LM13700) works fine for getting a rather pure sine wave. I just need a "post-ring-mod" tone control...

How big did U say the pcb was going to be?

Considering that the PCB will be pretty large with the circuit in it's present form I fear I have to skip additional " Meatball-meets-RingO-thru-a-Filter-thingie..." modules 

Regards,

Markus

[ignsk]

Impressive project and realization.
I think I'll have to go through all that once or two times more.
Pretty thick indeed.

Sounds really good to me

thank you all

[markusw]

Impressive project and realization.
I think I'll have to go through all that once or two times more.
Pretty thick indeed.

Sounds really good to me

thank you all

Glad you like it 

I think it would help if I made a summary on how the circuit works, or at least I think how it works 

Markus

[ignsk]

I think it would help if I made a summary on how the circuit works, or at least I think how it works 

Obviously it would... as far as I'm concerned . I did not went through my second reading yet so I'm still stuck in the maze of those trigs PLL VCO S&H  but I know I 'll make it(Wonderfull hope of the noob  )

[loss1234]

can anyone here help me understand this schematic? the lf398 doesnt make much sense to me (the pins are what?) and there is no input processing shown. is there a good low pass filter schematic i could put in front of this project?

any 4046 experts out there? (thats the main section i am interested in is the 4046 and diviiding part

thanks!!!

[RGP]

I'm very interseted in building Marcus W's Strring Pluck Detector. It sounds awsome.  What I'm trying to figure out is the connections to some of the ICs. Can anyone explain what pin numbers are used for the 4015 and the 4040?   

[ElectricDruid]

Here's the pinout for the 4040 and 4015:





Q outputs are easy, Clock inputs are pin 10 on the 4040, 1 and 9 on the 4015.

Be aware that that schematic is from a simulation. So the circuit might be tested in the sim alone, and it doesn't look entirely complete to me - or at least assumes quite a lot of stuff.

[RGP]

Thanks for your quick reply.  What confuses me are the labels Marucs used such as dsa, dsb etc. I/m not familiar with logic circuit labels. Any help you can give explaining this is greatly appreciated 

[ElectricDruid]

Thanks for your quick reply.  What confuses me are the labels Marucs used such as dsa, dsb etc. I/m not familiar with logic circuit labels. Any help you can give explaining this is greatly appreciated

It's not a question of being familiar with logic circuits. It's just a question of matching up the labels on the schematic with the pinouts - and not all pinouts will use the same labels. If the schematic had pin numbers, we wouldn't have to bother, but as I said, it's a simulation drawing, not a "proper" schematic from some CAD/CAM software.

For the two you mention, we've got "D_A" and "D_B" on the 4015 pins 7 and 15, so I'd guess those are the ones. I don't know what they do exactly without looking up more about the 4015.

[RGP]

I looked closely at several similar schematics for the E&MM Harmony Generator and I think the 4040 connection labled R might be pin 11 & the one labled CP might be pin 10. On the 4015 CP might be pins 1&9 tied together. MR pins 6&14 tied together. I think you're right about the DSA & DSB being pins 7&15. One other thing. What do the small circles mean?       
I'm redrafting Marcus' schematic in an old graphics program I use. Once I have it done I'll find out how to post it here. Again, thanks much for your help.     

[ElectricDruid]

Ah, now, the small circles *are* a proper logic symbol. That is used to indicate an inversion. So for example, a NAND gate symbol (like the 4093) is the same as an AND gate (a curvy box thing) with an extra little circle stuck on the output:



In this case, we've got some little circles on some of the *inputs*, indicating that they're inverted logic AKA "Active low". That's pretty common on Chip Enable pins and Reset inputs.