Re: Selection of a microcontroller for Childs Toy...

On 29 Jun 2005 21:15:00 -0700, hypnoplay@xxxxxxxxx wrote:

>Hi,
>
>We are designing a simple childs toy with the following features:
>
>* Must Respond to up to 5 buttons
>* Output up to 2 minutes of preprogrammed sounds through a speaker
>* Must be programmable to respond in different ways according to the
>order of the button pressed
>
>It is preferred that the microcontroller contain an 8 - 12 bit onboard
>DAC, EEPROM programability, low voltage consumption...
>
>Optional features would include melody output (To play music while
>sound is playing).
>
>I have investigated the Winbond Powerspeech series. It seemed perfect
>at first glance, however it is not offered with EEPROM. We plan on
>producing these in bunches of 100-500 thus necessitating the EEPROM.
>
>Any suggestions would be appreciated.
>
>Thanks,
>
>Tim

'real' DACs will be expensive and rarely found on low-cost micros - you should look at using PWM
etc. techniques.
The Atmel ATTiny26 has a PLL peripheral clock mode that will do PWM with a 64MHz clock. With
suitable software you should be able to get a decent audio signal using this. Sucks a bit of power
in this mode but if you're driving a speaker this will not be too significant,
.

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