Let us learn about the popular RTL-SDR

RTL-SDR is a low cost software defined radio dongle which can be connected to the computer and needs a software installed in the computer. Though some SDRs like HackRF and BladeRF are capable of transmitting, RTL-SDR is receive only. Community developed software is available free of charge. RTL2832U chipset based DVB-T TV tuner dongles were modified to produce RTL-SDR. DVB-T stands for Digital Video Broadcasting – Terrestrial. Receive frequencies can range from 500 kHz up to 1.75 GHz, which is quite a wide range useful for the radio hobbyist. It can run with single board computers like Raspberry Pi and even with Android mobile devices.