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john70t's Avatar
 
Join Date: Aug 2001
Location: midwest
Posts: 39,908
I would guess that even old school filament test light should draw no more than .25-2W power.

Testing is a few seconds.

If any modern circuit is designed that frail....i.e. designed to fail

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Old 09-14-2023, 11:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
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Join Date: Jul 2001
Location: Leave the gun. Take the cannoli.
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Quote:
Originally Posted by john70t View Post
I would guess that even old school filament test light should draw no more than .25-2W power.

Testing is a few seconds.

If any modern circuit is designed that frail....i.e. designed to fail
Old style test light with an incandescent bulb not only will draw more current, but when you have it connected to the battery the tip will measure close to 12v unless it is probing a ground. That can fry logic/computer signals.

The 'digital' one will draw negligible current, and will not present a voltage to the point being checked.
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Old 09-14-2023, 11:50 AM
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Join Date: Apr 2001
Location: Linn County, Oregon
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At the price, I figure well worth replacing the old bulb type in your toolbox.

Dad, that is the most succinct explanation I've read. Thank you..

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Last edited by pwd72s; 09-14-2023 at 03:14 PM..
Old 09-14-2023, 12:04 PM
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