Use a Raspberry Pi, PiTFT, and RTL-SDR software-defined radio dongle to build a compact radio frequency scanner.
Overview, Freq Show: Raspberry Pi RTL-SDR Scanner
Raspberry Pi SDR Receiver - The
Freq Show: Raspberry Pi RTL-SDR Scanner
Using RTL-SDR with Linx running on a Raspberry Pi - NI Community
Raspberry Pi RTL-SDR Frequency Scanner – 2E0DFU – playing with amateur radio
Satellite Receive Station with RTL-SDR and Raspberry Pi
Best SDR Radio receiver Scanner Frequency range 10K-2GHz with driver software Android / Windows, Mac OS
Tutorial: Replay Attacks with an RTL-SDR, Raspberry Pi and RPiTX
Nooelec - Nooelec NESDR SMArt v5 Bundle - HF/VHF/UHF (100kHz-1.75GHz) RTL- SDR Kit with 3 Antennas. RTL2832U & R820T2-Based Software Defined Radio
Building a Ham Transceiver with an RTL-SDR, Raspberry Pi and Rpitx