Yes, this is important (and I think it's mentioned in the TNS-BUF manual). I had nasty spurs from an overhead florescent light in one test run until I put black tape over the LEDs.
On Aug 19, 2018, 4:38 AM, at 4:38 AM, Poul-Henning Kamp <[email protected]> wrote: >-------- >In message <[email protected]>, Bruce >Griffit >hs writes: > >>It exploits the fact that for a RED LED at least the difference >>between the LED forward voltage and the transistor Vbe is ~ 1V and >>has a fairly low tempco and has low noise (at least for RED LEDs). > >... in darkness. > >When using LEDs this sort of way, they should always be totally >shielded from all external light. > >-- >Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >[email protected] | TCP/IP since RFC 956 >FreeBSD committer | BSD since 4.3-tahoe >Never attribute to malice what can adequately be explained by >incompetence. > >_______________________________________________ >time-nuts mailing list -- [email protected] >To unsubscribe, go to >http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
