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Category Archives: Electronics

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Awesome spectrum analyzer from DVB-T tuner

majek.sh Posted on 2013/02/19 by majek2013/06/22

Few weeks ago I stumbled upon some topic on one of FPV forums about checking frequency, spectrum, antennas etc. I realized that people are using cheap DVB-T tuner based on Realtek RTL2832U chip as spectrum analyzer, SDR (software defined radio) … Continue reading →

Posted in Electronics, Linux, R/C | Tagged r/c, rtlsdr, spectrum analyzer | 11 Replies

LCD88: R/C DIY transmitter

majek.sh Posted on 2013/01/12 by majek2013/09/01

Another one? 🙂 There are some other open source transmitter projects, so why did I start another one? At first, I started it in 2009 – there wasn’t too much free options avaliable, ready made transmitters were also very expensive. … Continue reading →

Posted in Electronics, R/C | Tagged arduino, avr, diy, frsky, lcd88, ppm, r/c, transmitter | 6 Replies

E-OSD

majek.sh Posted on 2012/08/30 by majek2015/02/08

Here you can find some information, schematic and modification of HobbbyKing’s cheap E-OSD. Everything on that page i did almost year ago, but I think it deserves for some immortality and maybe it will be useful to someone 🙂 How … Continue reading →

Posted in Electronics, R/C | Tagged avr, diy, e-osd, osd, r/c | 7 Replies

G-OSD mod – new input

majek.sh Posted on 2012/08/20 by majek2018/11/18

G-OSD schematic diagram and making new analog input to it. I was very curious how everything is connected in G-OSD. It is similar to E-OSD but different – they added potientiometers, analog inputs and gps. And there was also one … Continue reading →

Posted in Electronics, R/C | Tagged diy, g-osd, osd, r/c | 8 Replies

Voltage divider for FrSky

majek.sh Posted on 2012/08/20 by majek2012/09/23

Very simple voltage divider for FrSky. I use 3S battery, so I have maximum 12.6V while FrSky accepts only maximum 3.3V on its analog inputs. This time without schematic because there is no need to draw two resistors and two … Continue reading →

Posted in Electronics, R/C | Tagged diy, frsky, r/c, small things | 2 Replies

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