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More Mailbag Macarism Forum HERE Podcast: Download

How is a double sided plated through hole solder masked and silk screened component olverlay PCB manufactured? Take a step-by-step tour of a PCB manufactuing plant. www.pcbzone.net Forum HERE Hard electroplated gold card edge connectors VIDEO Desing for manufacture tutorial VIDEO DFM Automated PCB Panel Testing VIDEO Alba PCB Group …

Solar Freakin’ Roofs! How viable is Tesla’s Solar Roof concept? What did Elon Musk not mention at the product launch? UPDATE: Yes, the press kit mentions they all have identical looking solar and non-solar tiles to chose from for shaded/inefficent areas. How efficient are they? Who much energy is required …

How did you take “digital” photos in the 1980’s and early 90’s? With an analog still video camera that stored images on a PAL format 2″ video floppy disks, that’s how! Enter an age before SD cards, flash memory, JPG files, and USB! A teardown of a 1991 vintage Canon …

Old component bonanza Mailbag! Forum HERE SPOILERS: TI-74 BASIC pocket computer teardown from 1985 OpenMYR WiFi Motor Kickstarter Several 4-banger calculators GEZE automatic roller door controller teardown E-Book reader teardown and PCB bypassing techniques Switch & Lever Podcast: Download

It’s finally here! The first Solar Roadways installation happened in Sandpoint Idaho after $3.9M in funding and 6.5 years of development. Does it work? Is it practical? Once again, Dave runs the numbers… Forum HERE Podcast: Download

Dave sketches up an idea for a more integrated Raspberry Pi supercomputer cluster with integrated ethernet and power. Forum HERE Podcast: Download

A viewer found an EMC issue with the Keysight U1272A multimeter Dave confirms both conducted and coupled issues and finds some spooky action at a distance! Comparisons with other meters confirm they don’t have the same issue. Fluke 87 GSM Problem VIDEO Forum HERE Podcast: Download

How does a high voltage differential probe work? How is it safe? Is it isolated? A teardown and some reverse engineering of the Lecroy AP031 25MHz HV Differential probe. a.k.a Sapphire Instruments SI-9001 Forum HERE Podcast: Download

Dave takes a look at how to optimise the low burden voltage multimeter design from PART 2 to eliminate some parts. And explains the µCurrent shunt circuit design and how that applies to this new optimised design. It’s basically a practical tutorial in circuit design optimisation. Then another design variation …

Mailbag time again. Forum HERE SPOILERS: Dave’s first multimeter hack! Sinclair PDM35 Multimeter Russian analog multimeter Canyse 801 data logger Kickstarter Masso CNC Controller Lumintop Prince 1000 lumens flashlight torch Lumintop micro USB rechargeable 18650 cell teardown Canon Ion Still Video Camera and the VF-50 2″ floppy disk Podcast: Download

Dave looks at the current measurement front end of a typical multimeter and figures out how to redesign it for lower burden voltage. It’s not quite as easy as you might think, there are comprimises and traps for your players. And something you probably didn’t know about HRC fuses. µCurrent …

Inside the cheap arse Jaycar SL3467 “Rave” DMX controlled RGB LED disco party lights scored for $1 from the dumpster sale. Did Dave get ripped off? Podcast: Download

The annual Jaycar warehouse sale, take it for a buck or it goes in the dumpster! UPDATE: Yes, all the hard drives work. Forum HERE Podcast: Download

What is an oscilloscope? What is it useful for? How is it used? What is the difference between an old school analog and a modern digital storage oscilloscope? Rigol DS1054Z is a good basic digital scope How not to blow up your oscilloscope VIDEO Mysteries of X1 Oscilloscope Probes Revealed …