Re: How inaccurate is a 555 or 7555 REALLY?


"WildIrish" <wildirishtiming@xxxxxxxxxxx> wrote in message
news:1165116310.577657.14790@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

** Groper alert.


.002% would be good enough for me.... but i don't know where to find
examples
on making a tiny quartz crystal divide down to 420hz in a tiny package
(I don't have more than about 3/4" box to fit things into.) or any
other component
oscillators that can reach 420hz with the least number of components.

Any basic circuit diagrams online that someone can point me to would
be greatly appreciated! Sine wave output preferred, but I think square
will do if that ads complexity (I bet it would).

Again please remember I'm a novice with minor experience :)



** Then it is time to realise that YOU are not up to the task.

The size and performance criteria you have come up with make it a job for an
expert.




........ Phil



.