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Need to swap the order of 12 wires
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cowasaki:

--- Quote from: Tomorokoshi on October 27, 2019, 09:03:43 pm ---Qty. 6 small-format DPDT switches?

Something like this?
https://www.digikey.com/product-detail/en/e-switch/100DP1T4B1M1QEH/EG2407-ND/378876

It would require knowing the "binary" settings for the combinations you need.

Do you need to change them on the fly, or only during some setup time?

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That’s not really practical part way through a song on stage :)

I’m liking the above IC. The microcontroller could have a program for the set and then it could be changed with a single on off on non matching switch
Ian.M:
You don't *need* a 12x12 crosspoint switch.   Six coils is twelve leads so you do need 12x something.  However, with only six coils, any possible series combo (including any polarity combos) can be constructed with only seven nodes.  Any time you parallel coils you save a node.  That means you only need a 12x8 switch.  That gives you a spare node, so you could take the output from the wiper of a pot connected across two nodes to permit live fine adjustment of the hum-bucking effect.   I'm currently envisaging it as a 12x8 crosspoint switch powered by a 12V battery, e.g 4LR44, to get enough headroom as the battery discharges, a micropower OPAMP as a rail splitter to get symmetrical +/- rails for the switch with respect to output lead ground, and a ultra-low quiescent current regulator  to power the MCU.
cowasaki:

--- Quote from: Ian.M on October 28, 2019, 12:14:36 am ---You don't *need* a 12x12 crosspoint switch.   Six coils is twelve leads so you do need 12x something.  However, with only six coils, any possible series combo (including any polarity combos) can be constructed with only seven nodes.  Any time you parallel coils you save a node.  That means you only need a 12x8 switch.  That gives you a spare node, so you could take the output from the wiper of a pot connected across two nodes to permit live fine adjustment of the hum-bucking effect.   I'm currently envisaging it as a 12x8 crosspoint switch powered by a 12V battery, e.g 4LR44, to get enough headroom as the battery discharges, a micropower OPAMP as a rail splitter to get symmetrical +/- rails for the switch with respect to output lead ground, and a ultra-low quiescent current regulator  to power the MCU.

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That sounds great. I understand most of the last part but not how I can sort it with an 8
james_s:
What about relays? They can be switched by simple logic in any combination you like, they're relatively inexpensive, have low contact resistance, good isolation, just another idea to consider.
gbaddeley:

--- Quote from: cowasaki on October 27, 2019, 09:00:50 pm ---...It is for 3 humbuckers pickups on one guitar. Each humbuckers is made of 2 single coil pickups so 3x2x2 wires. The sound of the guitar can be changed by swapping the wiring round to have coils working in and out of phase, parallel, single coils etc...
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Guitar pickups are essential a high source impedance device. The sound is influenced by the resistance of the volume and tone controls and capacitor in the guitar, the lead (capacitive loading), and the input loading of the amplifier. If you throw in active analog switching, amplification and mixing, the sound will change, probably not for the better. Been there, done that. Dynamics and upper treble are affected the most.

A suggestion is to use miniature mechanical relays, with a multi-position single-pole switch and diode logic to select which relays are operative in each position. The relays can select in-phase / anti-phase for each coil, which coils are in parallel, and which are in series (if you really need that). You can choose the most interesting combinations using the diode logic.
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