8 Questions 180 Answers 0 Followers
Questions related from Vladimir Kubov
In receivers with frequency conversion, false artificial signals, so-called "Birds", may occur at the frequencies and their harmonics of internal heterodynes. The SDR receiver HackRF One is...
17 April 2025 1,617 2 View
Radar Mowement Detector RCWL-0516 is based on 3.1GHz single transistor oscillator. This is not Colpitts or Hartley oscillator. This oscillator uses Transmission Line Ring Resonator Feed...
28 December 2017 1,975 0 View
Several months ago I purchased Luxmeter UNI-T UT383. This is a nice suitable device, but it indicates wrong illumination datafor outdoor conditions. The summer noon cloudless outdoor illumination...
26 September 2017 4,158 0 View
Need help on decoding Sun Irradiation Meteo Weather IWEC or IMGW epw Data Formats. What are the names of data columns in epw file? Here is example file.
16 May 2017 5,787 2 View
The Hall effect is explained with Lorenze forces.This effect has maximal value when electric current I and magnetic fild B are mutually orthogonal. The Magnetoresistive effect of resistance...
12 February 2017 5,184 11 View
The I(V)-curve for small Amorphous Silicon PV-battery is very differ from I(V)-curve for big Crystalline Silicon PV-battery. So simplest model with Photo-Current Source and Shunt Diode (classic...
08 April 2015 6,823 1 View
Here is example of temperature variations on two identical solar PV-batteries for Short Circuit- and Open Circuit - mode. The electrical load mode had switched on 12:22, and temperature...
09 March 2015 8,200 12 View
I had run such experiments with real monocrystalline Si PV-batteries since June 2014. I had measure the photo-current, and back-side temperature of two identical PV-batteries with different...
09 February 2015 5,526 13 View
