im working with repairing cell phones and I need to test connectivity, but the multi-meters that i have too big of a tip. are there micro tip multi-meters for precision use on tiny chips as small as 1mm-3mm?
closed as off-topic by tcrosley, PeterJ, Nick Alexeev♦ Sep 12 '15 at 6:04
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I have replaced the gross sized meter probe times on some of my meters with short sewing needles. These have the advantage that they are very sharp and very hard steel so they stay sharp a long time.
In my case I found the needles too small diameter for the collet on the end of the probe lead so I tightly wrapped 30awg bare wire around the end of the needle opposite the point. The wrap length was about 0.5 inch. Then with good flux and a hot iron I soldered the wrapped wire in place to increase the overall diameter of the needle body.
One set of probes I prepared like this about 8 years ago still has nice sharp ends.
Fluke has some very sharp probe attachments you can buy, I use them a lot. If I don't have those I use a pair of alligator clips and my pics (sharp dental tools you use for rework). They make for very precise sharp little probes.
A dremel or a metal file will make short work of the probe tips. Make them as thin as you need.