Posted on July 28th, 2015 2 comments
In this tutorial Dave explains how to precisely measure and calculate the remaining (or wasted) energy capacity in a battery using the graphical analysis technique using a spreadsheet.
The differences between constant power and constant current loads and when to use them is discussed.
Also, the importance of ESR and measuring the battery voltage under load is demonstrated.
This is a particularly relevant to the Batteriser product and proof is provided that shows that even over the entire current range, the wasted energy in a battery can be no better than a few 10’s of percent for a 1.1V cutout voltage. Blowing the batteriser claim of 80% wasted energy out of the water.
All of my battery related videos are HERE
Posted on July 24th, 2015 3 comments
Posted on July 21st, 2015 7 comments
Dave tears down the Rockband 3 Stratocaster Mustang wireless guitar controller from the Guitar Hero Xbox game manufactured my Madcatz
Posted on July 21st, 2015 1 comment
Isolated Current Measurement Interface from PM Test Equipment
PAL TV Pattern & RF Generator Teardown
LED Panel meter teardown.
Mail from Antarctica!
Sandmarc GoPro Selfie Stick & Pole
Sandmarc Armour GoPro bag
Rockband 3 Stratocaster Guitar Controller Teardown HERE
Posted on July 17th, 2015 9 comments
Dave debunks cordless anti-static wristbands you can buy on ebay for $1. Do they do anything at all?
Controlled quantitative static voltage measurements with a surface DC voltmeter are done to prove they are 100% bullshit!
And a direct comparison with a proper anti-static wrist strap and bonding point is included.
And a bonus tutorial on how to calibrate a surface DC voltmeter.
Dave’s 555 Timer T-Shirt is HERE