# \#schematic

**URL:** https://forum.midibox.org/tag/schematic/766.md

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## [MBHP CORE V3 diagram](https://forum.midibox.org/t/mbhp-core-v3-diagram/20725)

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**Author:** [@BrianS](https://forum.midibox.org/u/BrianS)\
**Replies:** 2\
**Last updated:** [February 22, 2020, 10:03am UTC](https://forum.midibox.org/t/mbhp-core-v3-diagram/20725 "2020-02-22T10:03:51Z")

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A Friend built me a “Core” board, with 4 DIN and 4 DOUT smaller boards. I am looking for the schematic for this board, to see if I can possibly connect some POTS to the board as well. I am also looking for the circuit d…

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## [MidiBox SID / MB6582 mixer](https://forum.midibox.org/t/midibox-sid-mb6582-mixer/19524)

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**Author:** [@BulletZ](https://forum.midibox.org/u/BulletZ)\
**Replies:** 6\
**Last updated:** [June 14, 2016, 2:34pm UTC](https://forum.midibox.org/t/midibox-sid-mb6582-mixer/19524 "2016-06-14T14:34:05Z")

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Hi there, I don’t know if something like this has been proposed already but if it hasn’t, here’s a simple two-transistor virtual-earth summing amplifier for the mixer output of the MB6582. It’s suboptimal in many ways …