Reply to "Design of a $10-20 DCS-TIU Port Tester Tool?"

stan2004OGR Forum Member

gunrunnerjohn posted:
...
A power LED with a big resistor might make sense, make it only draw a mil or two, you don't have to have them smokin' hot to indicate power.
How about the S-812C50AY-B2-U regulator, 500na quiescent power. Only 16V input voltage, but it sure doesn't waste power. 99 cents at Digikey.

Not sure about the 16V limit. I figure in this specific application some guys might hook the tester to AC track voltage which of course would be 18V command-voltage since this is for TIU testing!

If it were up to me (which it is not!), I would forego the AC option (9V battery only)…and use the real-estate and cost savings from the large electrolytic and diode for an on/off slide-switch and a resistor and power LED (1 mA).

7/22/188:13 PM

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