Comments on: Build Your Own Capacitor Discharge Probe

By: Nawual

Nawual — Thu, 26 Apr 2018 09:21:27 +0000

In reply to jon.

Hi, good idea the switch with 3 position.¿which can i use for this?

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By: jon

jon — Fri, 16 Feb 2018 01:30:48 +0000

Great little circuit. May i suggest, Why not put the 3 resistors in and add a 3 way switch to choose between the 3 depending on what your discharging ? I will go ahead and build myself one of these discharge tools using the 3 resistors and a switch (labelled).

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By: Reniel Silva

Reniel Silva — Thu, 03 Nov 2016 03:44:43 +0000

Thank You for this article! Can you post a picture of your probe?

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By: NAKUDO ROBERT.

NAKUDO ROBERT. — Thu, 07 Apr 2016 16:40:10 +0000

Thanks for sharing with us such a good innovation, may God bless you.

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By: Hicham

Hicham — Sun, 17 Jan 2016 09:17:56 +0000

Following Jestine technics that i learn from before was to place around 1.8 to 2kohms, basicaly your tool seems to be correct enough with leds indication, thank you George, good job making out a usefull tool.

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By: George Persico

George Persico — Sat, 16 Jan 2016 00:52:49 +0000

In reply to Andre.

Andre
This probe is designed to bleed away the charge on a capacitor, not to measure it. To measure 40,000 vdc you would need to construct a voltage divider using a very large value resistor at the top of the divider and a small (relatively speaking) resistor at the bottom to measure across.
If you do this often you should invest in a commercially constructed probe which can be safely used with your DVM. At 40Kvdc strange things can happen like conducting film on the surface if resistors. Mistakes can be costly. If any significant current is available mistakes can be deadly.

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By: George Persico

George Persico — Sat, 16 Jan 2016 00:31:57 +0000

In reply to Paulo Brites.

Permission given to use on your web page. Credit Jestine Yong so techs get back to here and learn more. George

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By: Tyrone

Tyrone — Fri, 15 Jan 2016 12:47:23 +0000

Very good tool George.

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By: Maurizio C.

Maurizio C. — Fri, 15 Jan 2016 00:49:46 +0000

Thanks! I look forward to buying one (patented) piece on the web soon!

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By: Allan

Allan — Thu, 14 Jan 2016 17:56:42 +0000

Hi George, what a cool capacitor tool. I sure love this article, great stuff and thanks for sharing.

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