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Searching for the chip that produces this tone

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newbrain:

--- Quote from: andy3055 on March 12, 2024, 06:34:25 pm ---It has some sentimental value in that, three of my workmates gave it to me when I left the company and the country as well, with a card that said, "... so that you will remember us for a long time..." The thing is still reminding me of them (all girls) every morning!

--- End quote ---
For you it's like a precious gem.

No spoiler tag here, so...
(Pun based on the name Hōseki,  ほうせき, meaning precious stone, gem, jewel)

EPAIII:
I have a kitchen timer (minutes and seconds) that makes that exact sound. I use it to wake me after sleeping for an hour or so because I get uncomfortable after that when in bed. I always thought it was some kind of digital square wave thing which would be an efficient use of the coin cell battery that it uses. Even though I use it every day, that battery lasts for half a year or more.

wraper:

--- Quote from: pcprogrammer on March 14, 2024, 07:33:20 am ---Or an ATtiny that can easily do it without any other components apart from maybe a decoupling cap and a rc filter to make the sound a bit nicer than harsh square waves.

--- End quote ---
I think it will actually sound worse if harmonics are removed.

soldar:
For illustration.

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