[time-nuts] Oncore 1pps driver & LED

Glenn glenn at net127.com
Thu May 4 19:35:15 UTC 2006


Could I just drive the LED off the DCD line?

thanks,
glenn


Randy Warner wrote:

>Glenn,
>
>You "should" be alright. You're driving a lot of CAT5, but since the
>data is only at 9600 baud you should be OK. The 1PPS on the DCD line
>will be fine too. To blink an LED you just need to buffer the 1PPS
>signal coming out of the UT+ as it does not have enough drive capacity.
>Just about anything will work: IC buffer or inverter (I use standard
>74LVC04's in my designs) or just a simple xstr inverter or emitter
>follower.
>
>Randy 
>  
>





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