My old linear Li-ion charger somehow blowed up. I found small hole in the chip. As my all batteries were exhausted, I need to build new charger. I voted for new technology- switching charger for Texas Instruments. I selected BQ24103 chip as it is stand alone 1 and 2 cells charger. Here is the abstract […]
When we have more than one video camera and we need to watch all images at same time we can place separate monitor for each camera. But person watching all this stuff will became mad after some time. Also, we must have lots of place for all these machinery. And it is very difficult to […]
I have old, used handheld Two-way Radio Kenwood TK-248. This is quite old, max 5W power output, 136(132?)-174MHz VHF band transceiver. The batteries are almost dead, but the radios is still working. Also I have wall-cube adapter to feed device from mains and special kenwood charger. Both stations were set to single channel and I […]
Everybody knows outdoors security cameras hanged on poles, house corners and other places. Typically it is white, gray of silver colored boxes with small windows in the front. Like these:
What is inside this box? Here is one opened, but without lenses.
Contents of the box:
A) heating element. Just small heater to heat the housing and especially […]
For my video surveillance project I needed special video camera to make video shots in the dark. One local company offered YOKO YK-3B41 or YK-3B43 video cameras. The body, lenses and IR emitting diodes are located in the same box. The box has IP65 class and the manager in that local company told, that it […]
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