Make a E-bow Variant

Here I'm showing how to make a Ebow or some thing that works like that

After getting bored of searching over inter net i got this

thin making according to schematic it didn't worked(as some parts were no where to find)

so after experimenting with the circuit i come with this

though i need a cover/body for it.

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Step 1: Things I Used

things i used
1) op amp LM386
2) 10 uF cap X 2 
3) 100uF cap
4) 220uF cap
5) .473 uF cap
6) 9V battery + battery plug(or clip or any thing to connect battery)
& 7) most important induction coils that are customized X2 (i obtained them from old CFLs inductances)

Step 2: Making It

it can be made according to the given schematics try to keep all objects closer to op amp chip

Step 3:

as for the coils it can be customized as 

(rest is same as in circuit diagram)

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    23 Discussions


    3 years ago

    I m having a problem in finding the coils, I bought two inductors but they didn't work well. Any popular models for these coils from eBay for example ?

    1 reply

    Reply 2 years ago

    The working DIY version I've seen uses 8 ohm and 50 ohm coils from tiny speakers, but I've been unable to find a 50 ohm anything lol, so builder may have custom made the 50 ohm. I've also read that builders hav had success with making a coil with a magnet and copper thread. The insides of old DC adapter plugs are a good source for the copper (useful for DIY guitar pickups)


    3 years ago

    how can we add Harmonic mode to e-bow?


    4 years ago on Introduction

    Hi Alex. How many ohm in both transformer coils to you used ? 16 ohm ? , 13 ohm? or 8 ohm?


    4 years ago on Introduction

    Hey. I am working on this I just needed to know what are the alternatives that I can possibly use instead of the transformer coils. Like can i use an 8 ohm speaker as output and 50 ohm speaker as input after removing the rubber outer cover?

    1 reply

    5 years ago

    I wonder if an electric guitar pick up could be used in reverse as an inductor...hmmmm


    5 years ago! I have been searching for a circuit or ible for one of these for years! I can't wait to try this. My are a circuit!

    wich are the values for the coils?? i get one coil-transformer from a CFL and it have 13 ohms, this will be useful???
    sorry for my english, i'm from Mexico :D


    Reply 9 years ago on Introduction

    i m still testing it but as my guitar is acoustic results are good still have to test on an electric. as for the transformers i got them from an old CFL(Compact Fluorescent Lamp) u can get it from an electronic parts show or some where like that


    Reply 7 years ago on Introduction

    Hi, any updates on this project? I just discovered the ebow, and would much rather make one myself, but don't have the knowhow to experiment. Sounds like this was still a work in progress when posted. Is the info contained here enough to make something that works reasonably well at least?
    Thanks so much for the post by the way!


    7 years ago on Introduction

    Hey Alex, do you customize both the input and output coils? I.E cut their sidebars and place a weak magnet on top.


    8 years ago on Step 2

    many people a complaining about ebow now working, i will try new circuit and then post again but right now I'm in the middle college entrance exam preparation


    Reply 9 years ago on Introduction

    ya you can actuall the transformers are much more like those magnetic guitar pickups. For better results you can also use magnetic buzzers with their above cover and metal diaphragm remover in same manner i guess u can also use a regular speaker with their diaphragm remover and its coil intact but results vary.


    9 years ago on Step 2

    Is the 47n cap, a 0.047uF electrolitic cap? or a 0.473uF cap?
    Where do you use the other 10uF cap?
    Thanks for the post

    1 reply

    Reply 9 years ago on Step 2

    actually it is a mistake on my part the other 10uF cap was to be place in place of 100uF after a few experiments i found 100uF works better, you can try experimenting yourself