Notifications
Clear all
Topic starter
2024-02-28 9:36 pm
Amazon sells these 40-second recordable cards for $5.00. Has anyone ever dissected one to explore their assembly? I have a use case for the "guts" but not in a greeting card format. My understanding is micro-controllers with speakers can be purchased for less than $2.00 but don't know what else other than batteries would be required. Apparently programming is typically proprietary?
2024-02-29 1:25 am
Amazon sells these 40-second recordable cards for $5.00. Has anyone ever dissected one to explore their assembly? I have a use case for the "guts" but not in a greeting card format. My understanding is micro-controllers with speakers can be purchased for less than $2.00 but don't know what else other than batteries would be required. Apparently programming is typically proprietary?
Can't say as I have ever seen one. That $2 price is when you buy a few hundred thousand, I suspect more like $10 to $20 for a hobbyist. The 'guts' are mostly software with a mem mike, some sort of speaker and an MCU like maybe an esp01, 07, 12.
Start with searching Bill's videos for sound or music. I found the following video VIDEO and it's accompanying article ARTICLE
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.
2024-02-29 2:18 am
Hi @lancem631,
AliExpress, and probably others list many MP3 player cards, with low power built-in amplifiers for about a couple of dollars + postage. Of course, these do not include microphones or speakers.
e.g. https://www.aliexpress.com/item/33051438117.html
Note there are several different types on offer, so search and read the descriptions to see if any meet your requirements ... this was just the first one to appear on my search.
I have absolutely no idea if any of them are any good, so this is just an observation and certainly not a recommendation!!
Be prepared to sort out any problems, and deal with limited documentation, etc. Bear in mind, the advert may be the only documentation, although many such small boards also get discussed on the Web, so Google may be able to provide more insight.
------------------
Ron (@zander) has already pointed to Bill's I2S article, which Bill (@dronebot-workshop) is tested and documented solution, which you might find easier and less frustrating.
Good luck with your project, Dave