This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, August 7, 2017

JHS Angry Charlie

I've gotten a few requests to redo the MI Audio Crunch Box with board mounted pots. How is that relevant to the Angry Charlie you ask? Well, it's the same circuit. JHS added a cap in parallel with the existing cap coming off the Presence control to ground which tames some of the highs. So if you want the Crunch Box, just leave that cap out.


25 comments:

  1. Yeah! This is very cool! Thanks man! You are the diyer evangelist!

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  2. means adding a 100nF cap on crunch box will make it Angry Charlie. nice!

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  3. Excellent work, congratulations to you

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  4. For anyone who's adventurous, I mashed up the Angry Charlie/Crunchbox with the original Guv'nor tonestack. Christened it the "Dirtbag". Will be verifying this tonight:

    http://imgur.com/a/T8NPi

    All tone pots are A10k, B100k for Vol/Gain.

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    1. It's verified. I really, really like this version. I find the tone stack to be a lot more flexible than the Angry Charlie/Crunch Box. I just kept wanting a bass control. Plus this one lets you scoop mids and get a pseudo-metal sound.

      There's not a TON of volume in the pedal, but it gets above unity even at minimum gain settings.

      The clipping LEDs light up quite nicely so it's a good candidate for mounting them in the enclosure.

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    2. nice, I'll give it a shot
      thank you

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    3. one more to clarify, is that 2.2uF above the IC a ceramic or elco?

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    4. I used a Tantalum cap there because I had it on hand. You can use that or an electro.

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    5. hi Ian, first of all, it works! but how to make the volume louder ? is it possible ? thx

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  5. Good morning. The only thing I do not understand is the mounting of the diodes ... I see that they are mounted in different verses, but what side of the diode is the cathode? Thank you. Joseph.

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    1. The flat side of the LED indicates the cathode. In this case the cathode of D1 is on the right, the cathode of D2 is on the left.

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    2. Thanks for the clarification. in the coming days I will build it and let you know how to sing. joseph.

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  6. Man do I have the weirdest issue with this one and kinda stuck. I cn trace the signal amplified&all to pad 1 of the tone pot. Then it's just gone, it will not come through to the other pads..=). It's not the pot(checked and tried multiple), I've refloated everything and checked voltages all. After many etched boards, this is the weirdest...And most likely it's just something stupid I've missed. Still, this making my own pedals is an awesome way(most often) to quiet down my adhd brain so that I can sleep, thanks dude!

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    1. Did you check for any shorts from pads 2-3 of the tone pot or pad 3 of the presence pot? My guess is something is shorting to ground and killing your signal.

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    2. Oh yes, right you are. I stayed away for a day and looked at it again...And there it was, right under ny nose, how could I miss it eventhough I checked the board after etching...A tiny copper bridge straight to ground.

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  7. Thanks for your layouts! I built this one and it works but I have a few weird kinks maybe you could help me out with. The volume is super loud, even when fully CCW. I could add a trimpot but wondering if something else caused this. Also, I have gain and tone full CW but not a lot of gain and has high end loss. Any ideas? I used all high end components and no substitutions

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    1. Sounds like there's an issue with the volume pot. Is lug 1 connected to ground? Because you shouldn't have any volume when it's fully CCW. I'd check out DIYSB to see if anyone else has had a similar issue (check for threads on the MI Audio Crunch box since this is the same circuit).

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    2. The problem was in the pot wiring, thanks for the suggestion. It's my first point to point build with board mounted pots.. I guess my eyes crossed at some point. Thanks for the quick response, I'll post pics of my build as soon as the graphics arrive

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  8. Hi, I have this one http://effectslayouts.blogspot.ca/2015/07/mi-audio-crunch-box.html how can I mod to JHS Angry Charlie?

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    1. Add a 100nf cap from Presence 3 to ground.

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    2. thanks brother. lets try!

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  9. Hi, I have serious doubts the 0.1uF added cap is correct. If you look at the Sweet Tea (a JHS double pedal which contains an Angry Charlie at one side), there is an SMD cap just on top of the IC, which must be the decoupling cap for the power supply of the IC. It is the only SMD component in that board and there are no 0.1uF caps close to the regular size 22nF tone caps. So I believe that "extra" 0.1 uF cap you see close to the opamp in the Angry Charlie guts pictures around the internet does only that: stability for the power supply of the IC. Unfortunately I didn't find any picture of a disassembled Angry Charlie to look at the other side of the board and confirm what I wrote, but I tried to add that cap in my clone pedal and that muffles the tone too much, compelling me to set the tone pots way too high to have an acceptable brightness.

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