Frederic Schmidt - Revision history

Frederic Schmidt at 12:37, 20 February 2024

2024-02-20T12:37:51Z

← Older revision		Revision as of 12:37, 20 February 2024
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	[[File:Headphone jack.png\|thumb\|headphone jack]]		[[File:Headphone jack.png\|thumb\|headphone jack]]
	The most important modification was also to add a 3.5mm headphone jack to the toy/instrument/machine and a small ~~Potentiometer~~ as a Volume control~~, when its~~ hooked up to a amplifier or if you use it with headphones~~, its~~ the small yellow thing.		The most important modification was also to add a 3.5mm headphone jack to the toy/instrument/machine so you can hook it up to external gear and a small potentiometer as a Volume control. When it's hooked up to an amplifier or if you use it with headphones. It's the small yellow thing.
	[[File:Volume pot.png\|left\|thumb\|volume pot]]		[[File:Volume pot.png\|left\|thumb\|volume pot]]

Frederic Schmidt at 12:34, 20 February 2024

2024-02-20T12:34:19Z

Frederic Schmidt at 19:42, 14 February 2024

2024-02-14T19:42:48Z

← Older revision		Revision as of 19:42, 14 February 2024
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	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. *[[File:PCB .png\|left\|thumb\|PCB]]		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. *[[File:PCB .png\|left\|thumb\|PCB]]

	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.		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.

	[[File:Case front with drilled holes.png\|thumb\|case front with drilled holes]]		[[File:Case front with drilled holes.png\|thumb\|case front with drilled holes]]

Frederic Schmidt at 19:40, 14 February 2024

2024-02-14T19:40:56Z

← Older revision		Revision as of 19:40, 14 February 2024
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	[[File:Use of spacers.png\|left\|thumb\|use of spacers]]		[[File:Use of spacers.png\|left\|thumb\|use of spacers]]



















	The buttons were sourced from an old children's toy that I also found at the recycling facility, the potentiometers were ordered in a set online with different values.		The buttons were sourced from an old children's toy that I also found at the recycling facility, the potentiometers were ordered in a set online with different values.

Frederic Schmidt at 19:40, 14 February 2024

2024-02-14T19:40:14Z

← Older revision		Revision as of 19:40, 14 February 2024
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	with the potentiometer, you can change the resistance and so the speed (Pitch)		with the potentiometer, you can change the resistance and so the speed (Pitch)

Frederic Schmidt at 19:39, 14 February 2024

2024-02-14T19:39:45Z

← Older revision		Revision as of 19:39, 14 February 2024
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	[[File:Open cassette player.png\|left\|thumb\|open cassette player with longer wires for the potentiometer\|336x336px]]		[[File:Open cassette player.png\|left\|thumb\|open cassette player with longer wires for the potentiometer\|336x336px]]
	[[File:Pot and wires routing.png\|thumb\|764x764px\|external potentiometer and wires routing\|left]]		[[File:Pot and wires routing.png\|thumb\|764x764px\|external potentiometer and wires routing\|left]]







			Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

			with the potentiometer, you can change the resistance and so the speed (Pitch)




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	~~Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.~~

	~~with the potentiometer, you can change the resistance and so the speed (Pitch)~~

Frederic Schmidt at 19:38, 14 February 2024

2024-02-14T19:38:55Z

← Older revision		Revision as of 19:38, 14 February 2024
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	The slightly thicker cables in black, blue and green were soldered to the electrical contacts where the old factory potentiometer was sitting.		The slightly thicker cables in black, blue and green were soldered to the electrical contacts where the old factory potentiometer was sitting.
	[[File:Open cassette player.png\|left\|thumb\|open cassette player with longer wires for the potentiometer\|336x336px]]		[[File:Open cassette player.png\|left\|thumb\|open cassette player with longer wires for the potentiometer\|336x336px]]
	[[File:Pot and wires routing.png\|thumb\|764x764px\|external potentiometer and wires routing]]		[[File:Pot and wires routing.png\|thumb\|764x764px\|external potentiometer and wires routing\|left]]


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	Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.		Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

	with the potentiometer, you can change the resistance and so the speed (Pitch)		with the potentiometer, you can change the resistance and so the speed (Pitch)






	=== Version 2.0 ===		=== Version 2.0 ===

Frederic Schmidt: final

2024-02-14T19:37:12Z

final

← Older revision		Revision as of 19:37, 14 February 2024
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	Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.		Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

Frederic Schmidt at 19:36, 14 February 2024

2024-02-14T19:36:35Z

← Older revision		Revision as of 19:36, 14 February 2024
Line 28:		Line 28:




	Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.		Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

Frederic Schmidt at 19:36, 14 February 2024

2024-02-14T19:36:04Z

← Older revision		Revision as of 19:36, 14 February 2024
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	Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.		Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

← Older revision		Revision as of 12:34, 20 February 2024
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	Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.		Now I was able to play back the cassette at different speeds (pitch it up and down) and also change the pitch while playing.

	~~with~~ the potentiometer, you can change the resistance and so the speed (Pitch)		With the potentiometer, you can change the resistance and so the speed (Pitch).



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	The buttons were sourced from an old children's toy that I also found at the recycling facility, the potentiometers were ordered in a set online with different values.		The buttons were sourced from an old children's toy that I also found at the recycling facility, the potentiometers were ordered in a set online with different values.

	At the end, i was able to set different speeds with the potentiometers and trigger them with the four buttons.		At the end, I was able to set different speeds with the potentiometers and trigger them with the four buttons individually.

	===== TAPES: =====		===== TAPES: =====
	I used a tape with recordings of bird voices that sounded very weird but still like birds but different species		I used a tape with recordings of bird voices that sounded very weird but still like birds but different species, if you pitch them up and down. I also used a tape loop with only one synth-sine-wave on it that I was able to pitch up and down to a specific tone with the help of a guitar tuner.

	if you pitch them up and down ~~and i~~ also used a tape loop with only one ~~Synth~~ sine wave on it that I was able to pitch up and down to a specific tone with the help of a guitar tuner.

	If you use two buttons, the values are added to each other and you can play some kind of portamento.		If you use two buttons, the values are added to each other and you can play some kind of portamento.
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	== The book of repetitions ==		== 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.		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 also used 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.		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. *[[File:PCB .png\|left\|thumb\|PCB]]		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 slow down (pitch down) but I found an other way to pitch down (slow down), wich I'll explain later. *[[File:PCB .png\|left\|thumb\|PCB]]

	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.		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. One common way to do this 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 contacts are exposed to touch.

	[[File:Case front with drilled holes.png\|thumb\|case front with drilled holes]]		[[File:Case front with drilled holes.png\|thumb\|case front with drilled holes]]
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	If you make a recording and keep the play button pushed down, it will loop the playback.		If you make a recording and keep the play button pushed down, it will loop the playback.

	sometimes ~~its~~ also distorting the sound and there are happy accidents happening sometimes. ;)		sometimes it's also distorting the sound and there are happy accidents happening sometimes. ;)
	[[File:Video The book of repetitions.mp4\|left\|thumb\|Video The book of repetitions]]		[[File:Video The book of repetitions.mp4\|left\|thumb\|Video The book of repetitions]]