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I found them at the recycling facility where we picked up the tired machines that still worked fine (most of them) | I found them at the recycling facility where we picked up the tired machines that still worked fine (most of them) | ||
== The Pitchman == | |||
The Pitchman was built out of an old Panasonic Walkman that still worked fine, when it fell into my hands and it still does, but now it has some extra features. | The Pitchman was built out of an old Panasonic Walkman that still worked fine, when it fell into my hands and it still does, but now it has some extra features. | ||
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[[File:Video Pitchman.mp4|thumb|Video Pitchman]] | [[File:Video Pitchman.mp4|thumb|Video Pitchman|border|left]] | ||
== The book of repetitions == | |||
For the book of repetitions, I sourced a small PCB of an old children's toy that was used to record and play back ca. 10 sec of sound controlled by two buttons, one to record as long as you hold it down and one to play back the recording function used also a beep sound to indicate start and end of the recording. | |||
To make it more fun, I used a technique called [https://de.wikipedia.org/wiki/Circuit_bending circuit bending]. and did some research on this. | |||
I found out, that this small PCBs of children's toys, with the ability of playing back sounds (also if they are fixed and not changeable), are using some kind of oscillator as a reference for the playback speed. You'll find it under the black dot on the PCB. I poked around with some wires and soon found the right spot to install a bend. I connected a small resistor next to the playback circuit to "high" (positive pole) and it resulted in faster playback. I couldn't find a bend to make it slower but I found a other way to pitch down (slow down), wich I'll explain later. * | |||
Since the hard "wired connection" is only able to make the playback very fast or normal (if not connected), I needed to find a way to get different resistances and one common way to do so is, to simply touch the contacts with your finger. Moving and pressing changes the resistance and also the current that is flowing and at the end the speed of playback and so the pitch. I extended the wires of the bend I found and connected them to a rubber pushbutton where i removed the coating from and scratched the PCB so the copper contact was exposed to touch. | |||
At the end, I putted the bended circuit in a happy meal plastic book and installed all the necessary components in the book casing. I also added two screws to be able to push the buttons from outside, when the book case is closed. | |||
The most important modification was also to add a 3.5mm headphone jack to the toy/instrument/machine. | |||
<nowiki>*</nowiki>If you record something in the pitched up state, with your finger pressed on the open contacts and then remove them, it will be pitched down. | |||
If you make a really short recording and keep the play button pushed down, it will loop the playback. | |||
[[File:PCB .png|left|thumb|PCB]] | |||
[[File:Install in book case with battery pack.png|left|thumb]] | |||