Dave takes you on a complete walk-through of a typical (7400) digital logic datasheet and explains all the specifications and information. Forum HERE

Dave looks at several USB logic analysers from ZeroPlus Arduino Starter Kit Forum HERE

Dave tears down the Keithley 617 Electrometer, capable of measuring sub-femtoamp (attoamps!) resolution. Forum HERE Hires Teardown photos: Video on the relay matrix

Dave tests the Uni-T UT-513 5000V high voltage insulation resistance tester with the PIntek 15kV HVP-15HF HV oscilloscope probe to see if it’s suitable for crude multimeter overload testing, with some spectacular results on the ANENG AN8008 Coupon Code: bargainprobe for 15% off Dave’s HVP70 probe! You can even pay with Bitcoin! Forum HERE

Trivia time. Dave explains one of the reasons why annoying centre negative DC power jacks exist. Forum HERE

What’s inside the Masterlock 4400 Bluetooth Padlock? Dave tests and investigates a particular magnetic attack mode. Forum HERE

What does the CE mark on a product actually mean? How do you get one? What is it NOT? What is a Declaration Of Conformity? There might more to this mark than you realised! The FCC mark is also discussed. Forum HERE

Dave shows how to do power supply MOSFET rail switching and demonstrates and discusses why supply sequencing might be needed. Forum HERE

More mailbag! More teardowns! Forum HERE SPOILERS: Tekbox TBLC08 CISPR16 Line Impedance Stabilization Network (LISN) for the measurement of mains line-conducted interference RF Telemetry Transmitter teardown Telecoms line PCB’s from the 1980’s and 1990’s Gridseed G-Blade Scrypt cryptocurrency miner Rogaine video advertisement hardware teardown

Servicing and cleaning the Olympus BHM microscope and 3D printing a Cree LED replacement