Print PDF
Favorite
Email
Before the electric keyboard came out you had these:
A primitive version that responded by thing the knobs.
By pushing hard or soft on the knobs, you can change the pitch or tone of the sound coming out of it.
(or select different knob combinations with your fingers, using two or more fingers)
This version has bin based on the macbook in technical design. (alu-housing) Two blocks of wood with cut out space in the middle nicely finished with a bit of paint. Removable battery compartment, led indicator and volume control make it the perfect old-school instrument from the old days.
A primitive version that responded by thing the knobs.
By pushing hard or soft on the knobs, you can change the pitch or tone of the sound coming out of it.
(or select different knob combinations with your fingers, using two or more fingers)
This version has bin based on the macbook in technical design. (alu-housing) Two blocks of wood with cut out space in the middle nicely finished with a bit of paint. Removable battery compartment, led indicator and volume control make it the perfect old-school instrument from the old days.
Layout_Kraakdoos.pdf(595x842) 144 KB
Definitely needs a 1/4" output!!
The circuit can be download here, it is in dutch but everone who solderd before can do this. the "bouwinstructies" or building instructions dont tell anything new.
http://www.transistorbart.nl/store/catalog/Layout_Kraakdoos.pdf
A few few things I run into:
-The picture shows a top-side view pcb.
-The grey spots the represent cuts or removed copper, these are also underneth the transistor Lm709!!!
- There is no "wrong-polarity-diode" in de circuitry
- the volume potentiometer in the picture is not connected!! you have to change the circuitry.
-the numbers correspond to the nobs you can touch, they have the follwing order on de crackle box top- side: (I think, based on video footage compared to my own crackle box...)
1 O O 4 (top side view)
2 O O 5
3 O O 6
- the cracklebox only works when multiple points are touched, and you do need large surface to touch, it will not work good just by holding the wires between your fingers.
A "1/4" or 3,5 mm jackplug is not possible because this will influence the impedance on the speaker output. It also changes the pitch, tone and volume, using a build-mic or just hold it close to one is much easyer....
Hope this will explain a lot...