madbean wrote:Some video tutorials for Eagle

very cool.

On professional made boards you can see a "filling" between the circuit paths. So you have to etch less material. Is there an option to set this filling automatically with a defined space to the paths or do i have to draw them manually with rectangle and polygon tool? yes, there is. try l...

Great work Gauss. Looks like a nice project you've put together there. I noticed on you scheme the first op amp stage only has a gain of 11, is this to avoid op amp clipping? thanks. :D that's the voodoo lab overdrive spec and i suppose that is what they had in mind. it certainly makes it different...

i put together a voodoo lab overdrive layout that appears on gaussmarkov.net. the principle differences with the OCD are well-discussed here and similar changes have been applied by folks here and diystompboxes to many other circuits, so i will leave the details to other posts. i kind of like leavin...

Here's another tip that is a gm original. :D You can hide layers using the DISPLAY command. And you can route your traces on the TOP or BOTTOM layer. So there is a way to hide some of the unrouted "rubberband" connections: ROUTE them on the top layer and then turn off the display of the to...

nice vanessa! i just stumbled on your thread. it must be kharma because i am pretty random and sporadic about looking at stuff. and i don't usually scroll down this far. :D that LABEL command in your summary is cool. i didn't know about that one. thanks! here's a tip --- one that people miss frequen...

after i go through learning something, i often start to make connections with things that i have read before. so i just realized that R.G. Keen made a similar observation about the lower corner frequency in his classic " The Technology of the Tube Screamer " where he notes With the stock 4...

soulsonic wrote:Very nice, GM!

thanks! much appreciated.

The VLOD is not an op-amp clipper. In this sense the DOD OD 250 and the OCD clone (that I have seen: markm's schem) are much more similar. In the VLOD, the amplitude of the signal never gets over 1.1V for a 100mV guitar signal. I suppose this keeps the diodes from being super hard clippers. At the g...

briggs wrote:The mosfets arn't hard clippers in your typical manner.

no, my point is that the op-amp that precedes those diodes is clipping hard.

So given that the 2.2k resistor is correct, I can understand why better why the tone control is a low pass filter in all settings. The op-amp clipping is quite sharp and puts a lot of high frequency content into the signal. The MOSFET clippers remove some of that. But a lot more is taken out by the ...

thanks for the confirmation. i apologize for missing doug's comments. i will go back and read again.

hi, i'm suspicious about the value of the resistor to ground in the feedback of loop of the first op amp in the schems that i have seen for the OCD. 2.2K is like the value you would see in a tubescreamer. and in this setup, with a 500K pot between the output and the inverting input, you are basicall...

HI, Simply not taking the MAX1044. Takes the LTC1044 or LTC1054 or TCA962 for this. This chips have not Problems. 8) regards Uwe it looks like the MAX1044 is a newer chip than the LTC1044. the MAX1044 datasheet says "They are pin compatible with the industry-standard ICL7660 and LTC1044."...

how embarassing. it's mentioned right at the top of the datasheet.

thanks, gm

perhaps someone would be willing to teach me how to read the supply current characteristics of these chips? i looked at both the MAX1044 and the LTC1044 and i do not see any particular limits. some of the graphs seem to show currents on the order of 40mA. also, the LTC1044 seems to operate its oscil...

markm wrote:Interesting.
Not to derail this thread but, welcome gm!!

thanks, mark!

@lmkv15: nice (eagle) layout.

interesting. stobiepole and i used R.G.'s +/-9V supply circuit with a 1044 for a recent Gristleizer project. it worked well. stobiepole pointed out to me that there is an advantage to using the chip: you don't get any imbalance between +9V and -9V. they stay equal in magnitude. you may not get that ...