Teardowns

Sinewave DC to AC inverter teardown

I have earlier posted DC to AC inverter teardown that showed wat was inside one cheap “modified sinewave” inverter. Now I do a tear-down to a more expensive “true sineware” inverter PI150S from Velleman. This inverter convers 12V DC to nice sinewave 230V 50Hz AC power  (up to 150W). View to front and back. This unit

Juicero may be the absurd avatar of Silicon Valley hubris, but boy is it well-engineered | TechCrunch

https://techcrunch.com/2017/04/24/juicero-may-be-the-absurd-avatar-of-silicon-valley-hubris-but-boy-is-it-well-engineered/?ncid=rss&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook&sr_share=facebook Ben Einstein, general partner at Bolt, served up this excellent teardown of the Juicero on the company blog. If you were wondering how a juice press could possibly cost $400… well, this is how.

Bad idea: GPS tracking of cars

Recently, the media has been on discussion on making the country roads to be controlled by private company and Finnish cars envisaged the so-called mandatory. black box. On this discussion it has been several times mentioned that the Finnish Government has planned a mandatory monitoring devices for all cars to collect “road tax” based on

Bizarre car to “mains” adaptor

Some time ago I built Avalanche pulse generator circuit. In that project I used a slightly odd car to “mains” adaptor device as the DC/DC converter to generate the voltage (around 100V) needed to power the avalanche circuit. Here is view of that part of Avalanche pulse generator circuit: I had bought that device that

Trust UPS teardown

An uninterruptible power supply (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. The on-battery runtime of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment.

Huge video display technologies

Big wall size video displays has been available from quite bit of time. Very many modern big displays are built using LED technologies that I covered yesterday in Big LED video display technology posting. This article covers some of the older technologies how big wall size video displays have been built. Before huge video displays

Cell phone charger

I have used some for time Barkan PB22B 2200mah Portable Charger Black to charge my smart Samsung S4 mini phone. I had some issues first that the charging was not reliable with my phone (worked well with some other devices). I decided to look what was wrong with USB Power Current Voltage Tester, and with