Must Have!
For LED tester
I ordered two of these, the seller was very helpful, they arrived very quickly and have been really useful.
I've used mine loads in the short time I've had them, it's especially useful for getting the SMD device polarity correct, nothing worse than checking the base of the LED for the polarity then it pinging out of the tweezers!
If you've got a 3D printer you can print yourself a base to mount it on (sorry blatant self plug, it's something I designed) https://www.thingiverse.com/thing:3098120 to help organize your LEDs as you test them and it makes the through hole tester a little easier to use.
The only improvements I'd like to see would be holes for M3 machine screws rather than M2's as M3s are more commonly to hand and/or some stick on feet, perhaps the LED symbol on the silk screen to reinforce the + / current flow direction, but otherwise, it's perfect for the job and incredibly handy to have.
Response from octal | Sept. 14, 2018
Hi Stephen,
Glad that you received your LED testers. Thank you for these nice words. It's very encouraging.
Very nice work with the 3D printed base. Really nice work, congrat!!!
I'll take into consideration the holes dimension remark.
Thank you for your feedback.