Introduction: Multimeter Probe From a Pen

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My multimeter probe died and I made a new one out of an old pen. Here's how I did it.

Step 1:

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Search for a (not working) pen and rip it apart.

Step 2:

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Scavenge the case and the metal tip. Metal tip isn't really neccesary, you can replace it with glue.

Step 3:

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Make a hole in the rear end of pen's casing (sharp scissors are perfect for it) and run a wire through it. (I was dumb enough to do it later, incredible pain in the... you get the idea)

Step 4:

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Get something that's pointy and made out of metal (like a nail or a screw) and some wire. When choosing a wire, make sure it's flexible enough for multimeter use AND is good for using the voltages you plan on measuring. My wire is 300V, which is just a little more than what I ever measure.

Wrap the wire around the pointy-metal-thingy (in my case, screw).

After that I used some good-old brute force to drive the screw into the pen's tip. It stuck there so well I didn't need to use any glue and I'm certain it won't budge.

Step 5:

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Screw the tip back on and solder on some kind of a plug to attach it to your multimeter, unless you own a silly multimeter like I do, which uses no plugs on probes. They're directly soldered on.

Comments

paragodmedic (author)2010-10-01

Be very careful with this homemade probe - especially around high voltages. Many plastics are not suitable for insulation, and the voltage can arc over. I read about this many years ago in an electronics magazine. This should be fine for low voltages, but be very cautious!

mechexpert (author)2010-01-27

hey thanks , my multimeter probe failed & this is just perfect to replace it

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