Dave replaces a cracked 5th gen iPad touch screen. Content rock bottom? But child happy, and one less new iPad that needs to be manufactured. Forum HERE

More Mailbag! Forum HERE

Part 2 of the LED Flicker investigation. Modding the driver for input and output capacitance and it’s effect on power factor correction and thermal performance.

Dave investigates why his new LED panel lights are flickering on camera. Teardown and measurement time. Forum HERE

The LifeSaber Kickstarter outdoor survival tool is a classic example of a Jack of all trades, master of none product design. A master class in how not to design a practical product. Yet another wind-up/crank USB charger tool with everything but the kitchen sink. It even has ALIENS! Compare Dave’s survival kit with the LifeSaber ...

Dave got one of these newfangled slim wallets, the Stealth Razor from Airo Collective, a Kickstarter project, the world’s thinnest wallet. Does it actually replace a full traditional leather wallet? How practical is it? Does the RFID protection work?

A tutorial on how to read timing diagrams. An essential skill for designing and understanding digital logic, FPGA and microcontroller designs and datasheets. Forum HERE

Dave found this crazy bargain of the century no-name $9 0.02% class multifuction process calibrator on Aliexpress. Is it any good? Actually, it’s an AIMOmeter AMPX1 that sells for over $200 on ebay, so what gives? How can they possibly manufacture and sell a 0.02% class device for under ten bucks? Teardown time. Links to ...

When does PCB propagation delay matter in PCB layout? Dave goes down the rabbit hole from DIY TTL processor design to DDR memory design and layout. DDR memory termination. What is a timing budget? When is it important? How does signal integrity matter? When do you have to do serpentine PCB traces to match trace ...

How to convert a dumpster Sony CRT TV into a retro computer RGB monitor. Going through the design considerations, schematics, datasheets and the “jungle chip” and how to feed in the RGB signal and switch it. Also a look at the the old school CGA video interface on an IBM PCjr and how to convert ...