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Dear nirious
Hi
It is very simple! We will have a ic ( like a ISD series ) that consist some latch . in first step we will have a A/D converter . when the voice changed to the digital value , you can save them with latches as well as . when you need them , you can get them and give them to the D/A converter . (by pushing the key .)
Best Wishes
Goldsmith
IC's on toys as far as I know are nonreprogrammable, so theres no way you can alter its data (digitized voice) but you can make your own chip and proram it and replace the IC of your toy as suggested by goldsmith. By the way, does anyone knows what is the type of IC packaging used in low-end toys, they look like black ceramic glued on board?
Dear Onigece and nirious
Hi
That black type of IC s called secret IC s or small pack( my mean is that it is 2 reason for making these types of IC s )
they use a base crystal without package in the board . and it is impossible that you know that what is in it!
Best Regards
Goldsmith
To my knowledge the "talking" chips in toys are programmed and you cannot alter the program.
But I purchased many times various greeting cards with an "open" chip into which you can talk your short sentence. Those greeting card chips you can alter many times. Replace the toy chip with the reusable one including the speaker and microphone.
The built in ICs in toys are normally COB (Chip-On-Board) and are factory programmed and are OTP (One Time Program) because they are cost effective production, can not be modified. The Recordable chips (in greeting cards) are EEPROMS for short length of recording, entirely different from pre-recorded ones.
Yes those can be fixed in toys but that is replacement not modification.
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