[sdiy] Adding MIDI to cheap non-MIDI keyboard?

[Roman Sowa]

There are a lot of MIDI encoders available for things like that. Just 
cut the aparently poor synth circuitry, leaving only contact leads and 
connect to such encoder.
Can't tell how the contacts are made in such mat, it may be 1 wire per 
note, or there are a few diode martix strip PCBs along an edge and then 
all wiring reaches the synh box.

Anyway, this is simple DIY project for someone doing a bit of 
microcontroller programming, but if you don't want to bother reinventing 
the wheel, you can buy ready to use board. No need to sacrifice working 
MIDI keyboard of any kind just to get the electronics.

I'm not the only one making those so you don't have to buy it from me ;)

Roman

W dniu 2026-05-22 o 02:49, Didier Leplae via Synth-diy pisze:
> Does anyone have ideas about adding MIDI capability to a cheap keyboard 
> that doesn’t have midi out?
> 
> A friend of mine is interested in using a piano mat, made for kids, in 
> performances, but these kinds of keyboards are very limited in their 
> sounds. So, I wondered how feasible it would be to add a midi out.
> 
> 204980-z1.jpg
> Giant Piano Mat | 25-Key Floor Keyboard | Sharper Image 
> <https://sharperimage.com/products/giant-piano-mat?pc=20GOOGLE&utm_source=Google&utm_medium=CPC&utm_campaign=&Keyword=&device=m&creative=&cm_mmc=CPC-_-Toys_Games-High-Pmax_-NA&network=x&matchtype=&adpos=&creative=&cpgnid=20449531410&mkwid=%7Cpkw%7C%7Cpcrid%7C%7Cpmt%7C%7Cpdv%7Cm%7Cslid%7C%7Cproductid%7C204980-01%7Cpgrid%3D&ptaid=&gad_source=1&gad_campaignid=20458902433&gbraid=0AAAAAD2cqCUI8MxDTjDLfNL7uhdfViWv-&_su_rec=FP-aYnzs-FKQsDD5SjkbPUuyo_NUye2kNIfmrONztX7vXumZd3RUk-WF0h9EE9ek2zNsZMvR4TXZ8wKri93C7mtufd8LotpefTdUmK2mcbk5ZGx1SCFfV2720Enp-R4mkJH6cRwnt9LWXee-BbJkldeIl7ZHPavMo3BiArr8avD0iTmfma6jl9XUkuJBy8rm916xrJAV4u8vFqyFAk00oHYYCX3JvVqXWV2KlVUayl2x9Y8r48irA1NPc758&_su_rec_id=93701661-d517-4b9b-a02e-ba2d43d9984f-1779410685>
> sharperimage.com 
> <https://sharperimage.com/products/giant-piano-mat?pc=20GOOGLE&utm_source=Google&utm_medium=CPC&utm_campaign=&Keyword=&device=m&creative=&cm_mmc=CPC-_-Toys_Games-High-Pmax_-NA&network=x&matchtype=&adpos=&creative=&cpgnid=20449531410&mkwid=%7Cpkw%7C%7Cpcrid%7C%7Cpmt%7C%7Cpdv%7Cm%7Cslid%7C%7Cproductid%7C204980-01%7Cpgrid%3D&ptaid=&gad_source=1&gad_campaignid=20458902433&gbraid=0AAAAAD2cqCUI8MxDTjDLfNL7uhdfViWv-&_su_rec=FP-aYnzs-FKQsDD5SjkbPUuyo_NUye2kNIfmrONztX7vXumZd3RUk-WF0h9EE9ek2zNsZMvR4TXZ8wKri93C7mtufd8LotpefTdUmK2mcbk5ZGx1SCFfV2720Enp-R4mkJH6cRwnt9LWXee-BbJkldeIl7ZHPavMo3BiArr8avD0iTmfma6jl9XUkuJBy8rm916xrJAV4u8vFqyFAk00oHYYCX3JvVqXWV2KlVUayl2x9Y8r48irA1NPc758&_su_rec_id=93701661-d517-4b9b-a02e-ba2d43d9984f-1779410685>
> 
> <https://sharperimage.com/products/giant-piano-mat?pc=20GOOGLE&utm_source=Google&utm_medium=CPC&utm_campaign=&Keyword=&device=m&creative=&cm_mmc=CPC-_-Toys_Games-High-Pmax_-NA&network=x&matchtype=&adpos=&creative=&cpgnid=20449531410&mkwid=%7Cpkw%7C%7Cpcrid%7C%7Cpmt%7C%7Cpdv%7Cm%7Cslid%7C%7Cproductid%7C204980-01%7Cpgrid%3D&ptaid=&gad_source=1&gad_campaignid=20458902433&gbraid=0AAAAAD2cqCUI8MxDTjDLfNL7uhdfViWv-&_su_rec=FP-aYnzs-FKQsDD5SjkbPUuyo_NUye2kNIfmrONztX7vXumZd3RUk-WF0h9EE9ek2zNsZMvR4TXZ8wKri93C7mtufd8LotpefTdUmK2mcbk5ZGx1SCFfV2720Enp-R4mkJH6cRwnt9LWXee-BbJkldeIl7ZHPavMo3BiArr8avD0iTmfma6jl9XUkuJBy8rm916xrJAV4u8vFqyFAk00oHYYCX3JvVqXWV2KlVUayl2x9Y8r48irA1NPc758&_su_rec_id=93701661-d517-4b9b-a02e-ba2d43d9984f-1779410685>
> 
> 
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