Posted on February 14th, 2015 12 comments
How does a metal detector work?
Dave teardown and reverse engineers the circuit in a $17 Harbour Freight wand type metal detector, and also explains how to do basic reverse engineering of a PCB.
Posted on February 11th, 2015 8 comments
Dave breadboards a 1988 vintage Tandy / Radio Shack VCP200 speaker independent voice recognition chip from Voice Control Products Inc.
Will it work after 27 years?
Will it recognise his Australian accent?
Posted on February 7th, 2015 14 comments
Dave shows why Uni-T multimeters generally suck in this teardown (and a little bit of a review) of the $180 UT71E 0.025% accuracy multimeter with power measurement capability.
He also opens the UT71A, UT61E, and compares the input protection and rating with a Brymen BM257.
Hires teardown photos:
Posted on February 6th, 2015 18 comments
Radio Shack has gone bust and declared bankruptcy!
or Tandy as it is known in Australia.
Dave reminisces about the good’ol days
Posted on February 5th, 2015 5 comments
Dave got caught out by thinking his EDC MV106 Voltage Standard had failed, when it hadn’t. Perhaps due to his excitement of being able to do a repair video on it.
Another trap for young players.
EEVblog #210 – Krohn-Hite DC Voltage Standard Teardown & Calibration