Monday, 26 October 2015

Madbean Harbinger One

This is Madbean's version of the famous Univibe pedal.
I've added a "Multi-Vibe Mod" to it.
You can find all infos on this circuit or buy one of his PCBs here:
http://www.madbeanpedals.com/projects/index.html

09/11/2016 Layout Updated! Changed the charge pump daughter board.


There's also a different but verified layout by Savvas in the Forum section.

15 comments:

  1. Rock on! Building this on PCB was daunting enough... haha

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    1. Hey Luke, what was daunting about the PCB?

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    2. Nothing really just a lot of parts, it took a while to populate. Madbean's PCBs are a breeze.

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    3. my first build was a vox tonebender my second was a red rooster my third was a madbean harbinger one.if you build this spend the extra money and get the most expensive LDRs small bear sells. I bought 8 and matched 4 testing them with a dmm picking the four closest in resistence readings .To do this use alligator clips hold them under a lamp then cover them and count to 3 or four then right down the resitence. the good ones hit 20 meg in about 5 seconds . the quicker they go to high resistence the better .the 7532 are good but the hermetically sealed improve this dramatically.Also i tried mounting the ldrs both flat and raised pointing at the bulb at a 90 degree angle.i prefered the raised and pointing at the bulb. this also makes the light shield less of a factor.Remember when biasing the bulb dimmer is better.you want almost orange or yellow not intense white light. i topped out at just the beggining of white light.

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  2. Thanks Alex . i did the forum vibe mod to my savvas layout i did the .01 for all four for the phase 90 option. I noticed that the voodoo vibe has a tremolo setting. is it possible to mod this to be a tremolo as well?

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  3. Hello, could a Harbinger One built with the Madbean PCB be converted with this mod without a lot of difficulty? I very much like the mod, but am worried that the overall build will be far too complicated for me, so am wondering about getting a Madbean PCB instead. Many thanks.

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  4. Did someone already have the time to verify this one? That would be so awesome!!!

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  5. I built it and it works, so it's verified I guess. The only thing that is not working properly is the 18V board. As it is it only gives about 14V. In the schematic of the Harbinger One by Madbean you can see that there are 3 pcs 1N5817. If you follow that configuration it will give you 18V.

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    Replies
    1. Thanks for verifying it!
      I've updated the daughter board on the layout.

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  6. I forgot to mention that I used the upgrade kit for Univibe from Banzai. It contains the lightbulb and four LDR.

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  7. I've just started on this one, looking forward to firing it up some day soon

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    1. Please watch the position of the LM7815: the flat metal side must point to the right ( as seen on the vero layout) so the picture as it is maybe a bit confusing. I hope you understand what I mean, and good luck with your build.

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  8. I do not think the daughterboard is correct. First of all in the madbean harbinger manual on page 9 it says to leave out D1 (D5 on this vero) when using 9V wall wart! This is also logical as you would (on this vero) connect +9V to D4 on both sides!! D5 could however be connected to pin 8 of the LT1054 (as done in the madbean roadrage) and you can leave out the jumper to the right of D5.
    Also, the 100uF from +9V to ground is missing (I know this is not the most important cap). Lastly in the Harbinger one schematic the 100nF is not on the +9V side but on the +18v (and other side to ground). This is not very important as in the roadrage the 100n is on the +9V side.

    Also, you could leave out the zener. This only protects the LT1054 for an overvoltage as the LT1054 can "only" handle 16V at input.

    More info can also be found in the Roadrage manual by Madbean.

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