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Searching for the chip that produces this tone
nocamig429:
Hi!
I've been intrigued recently on what chip originally produces this sound:
https://youtu.be/iNpXCzaWW1s
Unhappily all the physical devices I tracked down are using epoxi blobs :/
Do anyone have any idea?
andy3055:
I have a bedside alarm clock that has the same chime. It is about 30 years old. Made in Japan .. HOSEKI. See photos.
nocamig429:
Thank you so much! ^-^
I'm researching it now, it seems that this DIP-8 STP2740C is still sold, but most datasheets websites have no idea what it is and redirect to similar identifications that are mosfets :-//
Not even STM (supposedly) seems to remember manufacturing these
wraper:
It's just a generic sound produced by huge number of different clocks and watches. There is no one specific chip that does it, there are hundreds if not thousands of them.
pcprogrammer:
--- Quote from: andy3055 on March 12, 2024, 02:25:02 pm ---I have a bedside alarm clock that has the same chime. It is about 30 years old. Made in Japan .. HOSEKI. See photos.
--- End quote ---
You meant to say "I had a bedside alarm clock" :-DD
--- Quote from: wraper on March 12, 2024, 04:15:54 pm ---It's just a generic sound produced by huge number of different clocks and watches. There is no one specific chip that does it, there are hundreds if not thousands of them.
--- End quote ---
Most will be simple non volatile memory based playback devices. Simple way to mimic it is to record the sound and reduce the amount of data to low sample rate 8 bits per sample and use a small microcontroller with PWM output to play it back.
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