[sdiy] Error on the SoundBite board!

Paul Schreiber synth1 at airmail.net
Sat Feb 2 07:01:18 CET 2008


>> R20 was 100K change to 1M
>>
>> R21 was 1K, change to 100ohms.
>
> Not having the schematics here, what were these resistors?
>
These are resistors used with the crystal and a 74HCU04 hex inverter to form 
the crystal oscillator. Look at any HCU04 datasheet, the circuit is there. 
If you are a REALLY old fart, then the original circuit is in the Motorola 
McMOS Handbook, c.1977.

Paul S.




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