EEVblog #1336 - DT71 LCR Tweezer Destructive Teardown + Lab Update - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 11, 2020, 10:42:53 pm
content: Destructive teardown o nthe Miniware DT71 LCR meter TweezersPlus a lab move update.

author: maginnovision
author_rank: Super Contributor
timestamp: September 11, 2020, 10:55:16 pm
content: Finally the serve their most useful purpose, a destructive teardown. Can't wait to watch(when I have time later).

author: SilverSolder
author_rank: Super Contributor
timestamp: September 12, 2020, 12:23:47 am
content: A lot of nice industrial design and ergonomic engineering work went into this product. What seems to be missing is an amount of "voltnut wizardry", to lift it to the next level!

author: olewales
author_rank: Regular Contributor
timestamp: September 12, 2020, 02:05:59 am
content: Hope there will be strong community support for this in form of open fimrware project. There is not much hardware in AVR component tester either yet devs managed to pull off impressive functionality using it. Clever utilization of those 12bit ADC and DAC could yield amazing results. Even just fixing bugs (functional secondary parameters, predictable auto mode behaviour) would make this device very usable. Absoulte accuracy for this kind of device is not essential anyway

author: CChin254
author_rank: Regular Contributor
timestamp: September 12, 2020, 02:06:55 am
content: IC Identification for this device:Block Diagram:

author: ckambiselis
author_rank: Regular Contributor
timestamp: September 12, 2020, 09:50:42 am
content: Quote from: EEVblog on September 11, 2020, 10:42:53 pmCould we have a few high-res pics of the traces on the twizzers, just to check what goes where, so we can make a cable to connect them to a classic LCR meter?Thanks

author: jonovid
author_rank: Super Contributor
timestamp: September 13, 2020, 05:24:31 am
content: reverse engineer the tweezers hinge design. 7:15 on the video.duplicate or similar by 3D printing the hinge, add your own gold plated tips & some silicone test leads plus banana plugs.hey presto you have your ideal test probes.

author: Bud
author_rank: Super Contributor
timestamp: September 13, 2020, 11:32:12 pm
content: With this tweezers with neodymium magnets on the bench you now have to worry about keeping them away from metal tweezers to prevent magnetizing the metal tweezers.

author: ckambiselis
author_rank: Regular Contributor
timestamp: September 14, 2020, 02:28:30 pm
content: Quote from: Bud on September 13, 2020, 11:32:12 pmWell if you are using quality stainless steel tweezers, that shouldn't really be a problem.

author: SilverSolder
author_rank: Super Contributor
timestamp: September 14, 2020, 04:03:54 pm
content: Quote from: ckambiselis on September 14, 2020, 02:28:30 pmI have found even the tiny amount of magnetism in high quality stainless can be an annoyance. I even have a demagnetiser on my desk to solve that problem!

author: Cnoob
author_rank: Regular Contributor
timestamp: September 17, 2020, 05:59:47 pm
content: you get Peek , Carbon+ Peek and ceramic tips for tweezers which should solve the magnetism issue.

author: SilverSolder
author_rank: Super Contributor
timestamp: September 17, 2020, 06:21:21 pm
content: Quote from: Cnoob on September 17, 2020, 05:59:47 pmThey look reassuringly expensive!But if it is the difference between something that works, and not...

author: Cnoob
author_rank: Regular Contributor
timestamp: September 18, 2020, 05:52:37 pm
content: Quote from: SilverSolder on September 17, 2020, 06:21:21 pmNot cheap but I like the ideal-tek ones and they are great for holding down 30AWG wire without out damaging the insulation when doing point to point wiring on square/round pad boards.