Today we are unpacking a brand new LCR meter from a company called Tonghui in China. It was purchased on ebay and took less than a week to arrive.
Chinese market packaging
Tonghui TH2822A LCR meter
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Author Archives: reagle
Keithley 197 Microvolt DMM in pictures
Today’s quick visual teardown is of an 1984 vintage Keithley 197 microvolt DMM, Despite considerable age, it’s still quite alive and kicking and very useful for measuring low currents and voltages.
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- Front
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- Handy short manual on the back
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- Display driver
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- Painted transistors- some type of matching indication?
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- A bit of a bodge?
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- Guard traces around sensitive circuits
Kikusui PLZ 72W electronic load teardown
Today’s quick teardown target is a 1985 vintage electronic load made by Kikusui of Japan. It came from eBay with a noisy fan, but was otherwise fairly functional despite the considerable age.
Only 2 inches wide
A make-shift data acquisition system
Recently, I was in urgent need for a data logger with a relatively fast sampling rate of at least 10Khz. As usually the need appeared late on Friday and system had to be functional over the weekend so ordering something was not an option. Continue reading
No-name GU10 LED lamp teardown
In the usual Kuzyatech fashion, when something breaks, we must take it apart. Today, one of the “early adopter” GU10 style LED lamps decided to fail mechanically:
We have a problem
Fading display repair on Fluke 8840A
Today’s repair subject is a Fluke 8840A bench DMM that has some display troubles. It would work normally for a bit and then start fading out. A bit later it would come back and work again. The initial thought was that the display simply had too many run hours and is worn out. In that case a replacement is required and is not a very cheap solution. Continue reading
Part of the week: Tag Connect
After a long hiatus, part of the week section is back. This week’s part is actually a bit more than just a part. It’s a whole concept called Tag Connect. When I first saw their ad, I smacked myself and said “why didn’t I think of that?!”. I am sure many others did the same, as it just takes all the things we’ve already been doing and makes them even better. Continue reading
Kicky Dude kit instructions
This came out from a need to scratch a personal itch. We needed a prompter to give signals when and where to kick the target for our Taekwondo practice. So we made a little dude who stands and beeps/blinks semi-randomly to show kick location. It’s a perfect kit to put together with a child as there are few parts and they are large and easy to solder. There are 59 total solder joints to make. Continue reading
Kicky Dude Taekwondo Trainer kit
Now available on tindie as a kit is the latest design- a martial arts training assistant aka Kicky Dude. Full write up and assembly instructions coming up. Thanks to awesome Multadroit Media for making it look so cool!
Bringing Samsung Galaxy Nexus back from dead
Today we have a new patient in the lab: a Galaxy Nexus phone that took a dunk in a river. It has been dried right after that and continued to function for a good six months after until it finally died. The only thing that happens when power is turned on is you get a short but blinding flash of camera LED and then everything goes dead. Time to take it apart and see what we can do. Continue reading