Electronics > Projects, Designs, and Technical Stuff
How to avoid shorting when sampling signals on an IC
magic:
https://sigrok.org/wiki/Probe_comparison
thm_w:
--- Quote from: dicky96 on November 03, 2019, 01:37:54 pm ---I've ordered these today
https://www.aliexpress.com/item/33039250212.html?spm=a2g0o.productlist.0.0.51321b78evJdw9&algo_pvid=ee90e604-220e-4f3b-a8ce-a0b08796b7ad&algo_expid=ee90e604-220e-4f3b-a8ce-a0b08796b7ad-0&btsid=edfb4d7a-aaf6-4e8c-a9b5-3ff46598f50c&ws_ab_test=searchweb0_0,searchweb201602_7,searchweb201603_52
I don't know if I can use them on 0.5mm QFP so I will try them and post here
--- End quote ---
I think defpom or another got those recently but didn't do testing yet (I can't find the video), to me it looked like they were too big and would short out the pins on 0.5mm. But one of the ali reviews says: "It's working up to SSOP, QFP 0.5mm pitch, lower You can grab only one pin." Either way its less than a cost of a single high end probe on that sigrok page so worth trying.
dicky96:
--- Quote from: thm_w on November 04, 2019, 10:38:17 pm ---
--- Quote from: dicky96 on November 03, 2019, 01:37:54 pm ---I've ordered these today
https://www.aliexpress.com/item/33039250212.html?spm=a2g0o.productlist.0.0.51321b78evJdw9&algo_pvid=ee90e604-220e-4f3b-a8ce-a0b08796b7ad&algo_expid=ee90e604-220e-4f3b-a8ce-a0b08796b7ad-0&btsid=edfb4d7a-aaf6-4e8c-a9b5-3ff46598f50c&ws_ab_test=searchweb0_0,searchweb201602_7,searchweb201603_52
I don't know if I can use them on 0.5mm QFP so I will try them and post here
--- End quote ---
I think defpom or another got those recently but didn't do testing yet (I can't find the video), to me it looked like they were too big and would short out the pins on 0.5mm. But one of the ali reviews says: "It's working up to SSOP, QFP 0.5mm pitch, lower You can grab only one pin." Either way its less than a cost of a single high end probe on that sigrok page so worth trying.
--- End quote ---
Yes I read that too. I'll happily do a video review when they arrive - they are already on the plane to Spain according to the tracking :-)
Rich
ptricks:
I don't probe on the chip if the pins are too close , I find a point on a trace connected to the chip.
graybeard:
tack a small piece of thin sold wire on with a soldering iron. I keep a spool of wire wrap wire with my soldering supplies for just that.
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