Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Enjoy the builds and please also visit us on Facebook and Twitter
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Saturday 16 January 2016
Madbean Shortstack Overdrive
Noticed frank had posted this in response to someones questions about the bluesberry mod for the hotcake. When i compared the schematic to the hotcake i noticed a few differences so I thought it would be a nice addition and variation to have on the site. The only addition to the schematic I mad is I added the typical 1M pulldown resistor to prevent any switch popping.
I believe you need to reverse the orientation of the diodes, otherwise D2 will always be conducting. See my follow up comments. Thanks!
ReplyDeletecool. just saw the post and fixed the diodes. i listed to the hotcake and its a nice OD, and some of the psych bands i really like and have seen live use it. i think some of the value changes in the madbeans version will make a significant difference in tone. so will be worth doing.
DeleteJust made this, works a treat! I used 240r resistors in place of the 220r. Unfortunately I don't the right reverse log pots, I used linear which has made those controls effectively useless but it still sounds sweet with the gain dimed. Cheers!
ReplyDeleteawesome. how does it sound compared to the hotcake demos? i'm super curious since there are no demos for this, well at least any that i could find.
DeleteWell I don't think I can be much of an authority on this but from what I can tell it sounds very hot cakey. I need to wait until my next tayda order arrives before I can really judge I t in its full glory. Also for the record I used a TL071.
ReplyDeleteGotta get them 741s!
DeleteBuilt this using a 741 and it sounds really good. I also had to use linear pots for the vol & gain but will rectify soon.
ReplyDeleteHi there,
ReplyDeleteis D2 already reversed or is the schematic OK now?
I build it but its not working yet...
Thanks a lot for the great work!
Jochen
hey jochen. the layout matches the schematic and is verified. if you built it and it didn't work there's got to be a build error somewhere. post the problem and some pictures of your build in the debugging section on the forum.
DeleteFor those wondering about D1 and D2. They are optional and you can build this effect without them. I would start by building without and testing, then add them in to see if they change the sound significantly. Also, if you leave them out, you can eliminate the upper blue jumper wire. And any vero with only ONE jumper is worth building ;)
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteIt sounds like Hell -Yeah :)
ReplyDeleteMy mistake (bad Solderpoint).
I´ll Post a Pic of the finished Pedal as soon as possible.
no worries buddy. the important thing is it's working and you're happy with the build. just remember if you're ever having a problem where to post about it so someone can try and help you out.
DeleteWhere does it goes the volume 1 lug? I just leave it without conection?
ReplyDeleteThanks in advance! :)
Goes to ground. It should be in the notes, I'll fix it later.
DeleteThe 100uF is for power filtering. I'm not sure what oscillation you're talking about, there's not issues with this layout.
ReplyDeleteThe pulldown resistor is used to reduce or eliminate (hopefully) the popping you get when you switch on and so are breaking that connection to ground. So yes you still require it, unless you get no popping of course, but you'll need to experiment with that yourself.
ReplyDeleteIs there a reason that the Volume is listed as 50KC above but according to the build document (https://drive.google.com/file/d/0B7EnzxavIi5_bks0cUo5bVhBUnc/view) should 50KA? And Volume 1 needs to go to ground or not?
ReplyDeleteAlso, what effect would changing the Gain pot to 10KB have?