[time-nuts] IRIG B

Don Latham djl at montana.com
Wed May 26 06:25:42 UTC 2010

Could probably do it all with a Propeller.

----- Original Message ----- 
From: "jimlux" <jimlux at earthlink.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Tuesday, May 25, 2010 9:36 PM
Subject: Re: [time-nuts] IRIG B

> Bob Camp wrote:
>> Hi
>> Audio codecs (especially monophonic ones) are pretty cheap these days.
>> Depending on volume they can get to the sub $1 range. Even in small 
>> quantity
>> they are below $4. That makes them a pretty tempting "front end" for a 
>> send
>> / receive box.
>> Bob
> i would think, given that the audio carrier is 1kHz-ish, that almost any 
> of the small microcontrollers would work, using a single bit in/out with 
> some RC signal conditioning.  Maybe a bit of a challenge for the receive.. 
> you'd need two inputs with different resistors.
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