Question: what do you do with a “wirelessly” re-charged electric toothbrush when its battery eventually dies?
Answer: salvage the tiny induction coil from inside the sealed body of the toothbrush handle. It’s ideal for making your own pickups. All it needs is a magnetic core and some patient, fine wiring work.
I glued a stack of a few 12mm diameter molybdenum magnets inside the coil’s bobbin, using a quick-setting epoxy resin. The results from a single coil pickup were so pleasing that I added a second, arranging the opposing magnetic senses and observing the required electrical polarities in order to make a mini-humbucker. I marked the magnets and the wires with red and black Sharpie pens to keep the assembly on track. The hardest part for me was stopping the fierce wee magnets from clumping together, so I used small clamps and glued them to a baseplate at two different times.
There are plenty more detailed photos in this shared Google Photos album of mine which might inspire you build your own version:
https://photos.app.goo.gl/i7Srwm8NHam78wHCA
Have fun!
Comment
Great thread! I learned a lot from this one. Brain hurt.
I remember it, it kinda looked like a 60’s Burns with all the plastic control plates on the face? Line 6 pretty much has that modeling guit market sewn up with their Variax guitars tho?
The Volkswagen guitar i mean .
Yeah . it had a good concept , but was generally considered a pos . Needed some more production tweeking me thinks .
That guitar has an onboard midi interface like the iRig software?
Thanks guys , It's spring cleanup nowadays in most places , a good time to look out for washer and driers , Older models have a end of cycle buzzer , usually located in the top right of the control panel . looks like a lil jackhammer with an axle usually banging against a piece of metal or the side of the machine . Another coil grab. for ya . and some have some funky knobs too.
And then we have piezos .------ musical greeting cards , microwave ovens , some older stylophones , etc etc . aRE all good PIEZO grabs .
On another note . (Amp related , not pickup related . ) In 2006 volkswagon had a deal with first act guitars , You would get a free vw guitar with purchase of the car , and the car was fitted with a guitar amp in the radio . so you could tailgate party and just plug you guitar into the car . open the doors and jam out .
This had folks calling auto wreck yards looking for that radio .. but . un-benounced to many . the amp wont work with just plugging a regular guitar into it . The first act guitar had an amp modular circuit in it that allowed it to work with the car radio amp.
However , You can still do this with any car radio and any guitar , If your car has a 3.5mm input jack, you can get a preamp or headphone amp, and plugthe guitar into it, and the preamp into the car. presto ! The reason you can't just plug the guitar into the car is that the stereo is looking for a line level signal, of between 1 and 1.6 volts while the guitar puts out about a third of that.
still may have volume issues tho .
ok . babble over .
peace out.
Ray, best to use wall warts rated higher than 9 volts, the higher resistance will give a louder pickup?
Thanks to Pick for the list. I knew of most of them, but not all. One thing to add, though. If the wall-wart doesn't have some heft to it, it likely doesn't have enough wire to do anything with.
Thank you Peter! Oh goody! I have another thing to tear apart!
Info for BrianQ:
The DC resistance of the pickup measured at the guitar's output jack socket is 7.3K ohms.
The output level works very well with my Crate GT212 amp at between 3 and 4 on its gain knob. Subjectively it's loud to my ears.
Cheers, Peter.
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