The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Peter Nolan"
Subject: 100Hz from 25.6kHz crystal.
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Tue, 3 Dec 2002 12:54:52 -0000
NNTP-Posting-Date: Tue, 03 Dec 2002 12:54:25 GMT
I just got some 25.6kHz crystals from www.digikey.com I want to get 100Hz
from the O7 output of a 4060 14 stage ripple-carry counter/divider and
oscillator. I am trying to use the Pierce oscillator( I wish I knew more
about the Pierce oscillator than I do which is close to zip) that is drawn
in the Philips datasheet at:
From here one can download the datasheet. It downloads in seconds.
In spite of my best efforts I cannot coax the oscillator to oscillate at
25.6kHz. Instead it oscillates at around 422kHz. I have tried varying Rbias
and C3 over the recommended ranges but to no avail.
The datasheet for the crystal(C-2 type) is at:
I think this is a useful circuit to have in ones armoury.
Any ideas about how to get the circuit to oscillate at 25.6kHz.
To email please remove x from email@example.com
Ps. I choose FedEx economy for shipping but Digi-Key charged me for FedEx
Priority at $67.19. From that point on "Words were passed" (from the song
"My Home Town" on the album "Born in the USA" by Brice Springsteen) and
eventually I got the cost down to around $40 with a warning to anticipate
high shipping charges in the future. The 10 crystals cost a mere 10$. By the
way Digi-Key seem to keep a good stock of these crystals.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup