just finished drawing this....and...
i'll start building this right now..i know it's agly with all these wires and standing resistors(sorry...), but i think that for those big schems, there is no other way to get them on vero.
first of all, this layout has 2 mistakes that i'll update later today.
i need some help from the more experienced friends here.
i've build this...but
my zener diode is getting really hot.i don't remember the watts, but it's a 8,2.
what should i do?should i search for higher watt value?
other than that i have signal passing thought, and a very annoying microphonic-like "delayed signal" in parallel with a clean signal, that somehow reacts with the delay and fdbk pots.i'm working on it...
also there is a great possibility that my cool audio chips and the ne570 are fakes...unfortunatelly i bought them from polida on ebay...along with some lt1054 which were definately fake...i don't know maybe i'm just loosing my time here...
hey! now that i'm on my pc, i see that actually the diode is as it's in the schematic..
strange...i've read somewhere that there must be a combination of a zener and a resistor, but with the schematic, my layout it as it should...
still nothing...my voltages are all good but i have a very loud annoying sound like a dronein parallel with a clean sound. the strange thing is that it starts right from the first 100nf input cap!!!(i've changed that but nothing...)does the circuit generates that sound somewhere and feeds it back to the input???i don't know...i think i'll leave it for today...
thanks mate...yeap...i've found that last night..also there is a missing cut under 150Ω near output, and the 100nF from pin8 of the first v3205 to ground is wrong. i has to be from VD to ground. i've also made a mistake with the mods for less distortion, but fixed that too. i 've checked everything point to point but nothing...i'm starting to believe i have fake ics...i think i'll order some ne570 and v3205 from a reliable source.
i desoldered fdbk 2 so i can probe my board without the whiny-drone sound that was "feedbacked" all over the place.now i can have one desent repeat out of both pin3 of the BBDs.the annoying sound is still there but very quiet. it kicks in after 16k R33, between ic3a and ic3b, or in my board, at the top tl074 under pin7 at the connection of 2x16k and 2,7nf
we have a dmm on vero!
the f$%^er at my lockal shop gave me 24Ω for 24k and i used them for that 24,3k...i just through inside a 25k and nailed it!
i'll update the layout on that cut Ciaran found too, and i think i'll make an other one with the distortion mods and without the useless LED and the transistor. but...bottom line...it works!
i'll try to post a demo in the next days
thanks once again Ciaran for your time and help!
please...take your time...i've spend at least 16 hours debugging. with some not verified ics. i basically build this thing to see if they are working. if you ever try this, please read madbean's pdf, and be patient.
this and the "rust bucket" were my nemesis.
now i can rest for christmas
The Dirtbag and Rustbucket were surely monsters that you made your bitches. Amazing work!
If the DJ is taking requests, I'd like to throw the Micro Synth into the ring. I know you mentioned in the past that you had started working on it, or at least had started considering it. I would LOVE to build that pedal up.. I'm totally willing to put my efforts and (limited in comparison to some others on this forum, including you for sure) knowledge to good use on that project..
But, whatever you decide to tackle next, I'm sure it will be extremely well-received and welcomed!
Happy holidays all.. and thank you again Sav for this masterpiece.
before I lost about a dozen effects to a water heater bursting in my basement (while all my effects were plugged into the wall... all circuits totally fried), I had a memory boy. I fell in love with that short-delay, chorused, ghostly metallic sound you can coax out of that box.
What would it take to trim down this DMMan and turn it into a MB? It's got the same sine/square modulation switch, feedback, mod speed, etc settings... I was hoping someone here could shine some wisdom down on the topic.
thanks for your kind words mate!
yes...i started micro synth but i wanted to use 13700 ics so that more people can build it. well...i somewhere stuck in that conversion...sorry..
i promise it will be the next big one!!!
as for the memory boy, i read that it's the same thing with DMM, but with internal trimmers for the controls that missing. maybe i'm wrong, and what i said is for the memory toy...i don't know..
maybe someone else has an idea???