Here are some interesting videos on professional audio and video technologies field: Mini backstage tour of the control area video takes a quick look at some of the stuff in the main control area of a big show. The next videos show what is inside some of the audio and video equipment: EEVblog #840 – →
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. →
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 →
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 →
Here is teardown of another cheap USB charger bought some time ago for around two euros from some chinese online shop. Brand “Designed by Able” Model 1300. Label Circuit board Closeup of circuit board One finding is that rectifier is replaced with diode, meaning that this half-wave rectifies mains power. Other findings: – The switcher →
DIY Wi-Fi Wireless Switch For Smart Home With ABS Shell Socket Remote Control Switch Module is an IoT home automation device. This device, also known as Sonoff from ITEAD, can control 110V to 230V AC mains power on/off (up to 7A or 10A depending on document). The switch is controlled with mobile app (or local →
Everybody likes high tech tear-downs. Hare are is information on what is inside of the two two hottest smart phones at the moment: iPhone 7 and Samsung Galaxy Note 7. While the iPhone 7 Plus retains the design basics of the previous generation it does have a lot of upgrades. Including a new dual camera →
I saw this normal screen gas station this morning whan trying to get gas. I put in my credit card, but nothing works. I took the card out. New attempt to put in the credit card made something strange to happened: The card terminal rebooted. I got several screens with all kinds of system information →
SilverCrest SWS-A1 is an IoT controlled electrical outlet device sold by Lidl. It connects to home Wifi network and that can be controlled with smartphone app anywhere where you have Internet connection. Silvercrest app allows to control the electrical outlet on and off (ON is meaning contact the power between electrical appliance and power supply. →
I have written several postings on Qi wireless power. To get a good idea how Qi really works, I bought cheap bare Qi charger board Qi Wireless Charger PCBA Circuit Board + Coil Charging (costs only slightly over two Euros / USD).Qi Wireless Charger PCBA Circuit Board + Coil Charging kit consists ofQi Wireless Charger →