/diy/ - Do It Yourself

Anonymous Sat Nov 12 03:15:04 2022 No.2501210 [View]
File: 72 KB, 1149x404, get power from a telephone line without disturbing it.png [View same] [iqdb] [saucenao] [google]

>>2500843
>48VDC, usually 23mA. Not much.

right, but not 48V and 23mA simultaneously. voltage drops with load.
think of it like a 48V battery in series with a 2400-ohm relay coil.
watch out for the ringing signal which is like 90Vrms. it provides painful shocks (happy face) and kills electronics (sad face).
but it wont ring if there's a load below some value of xxx ohms.

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/diy/ - Do It Yourself

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