[McHUG] Another Re: Meet To Eat / Calling All Dirty Birds

[Peter Morton]

Rich-

I just looked up the LMC567 datasheet at www.national.com.  The output of 
the LMC567 goes low (open collector) during the presence of the prescribed 
tone at the input.  The output of the chip requires a pull-up resistor to 
+5V (or whatever voltage is required at the input of the next circuit).

-Pete, W3GVX


----- Original Message ----- 
From: "Rich Mitchell" <geobra at att.net>
To: <pat at patkilroy.com>; "MicroController Ham User Group - Physical 
Computing for HamRadio" <mchug at mailman.qth.net>
Sent: Thursday, March 11, 2010 12:35 PM
Subject: Re: [McHUG] Meet To Eat / Calling All Dirty Birds


[snip]