A teardown of Amazon’s cheapest multimeter the DT-830B by Electronupdate:
Purchased the cheapest multimeter I could find so I could extract the integrated circuit. A surprisingly simple IC!
The actual meter design was much as expected. Poor attention to detail for higher voltages, concerning lack of fuses on current measurements… pretty thin feeling probe set.
Attractive die however!
More details at Electronupdate blog.
Check out the video after the break.
Hey, I have one of those! Really, these things are all over the planet… Beautiful, beautiful. Reminds me of the old skool dies, like the 6502 etc, but without the regularity of register files or datapaths.
For comparison: few photos of UNI-T M830BUZ, bought in 1998:
http://commonemitter.blogspot.com/2012/07/teardown-m830buz.html
At the time 2-3 times more expensive than todays equivalents even ignoring inflation.
Well, it COULD do a thousand volts. It never said anything about surviving…