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What you need to build a Raspberry Pi plane radar

by Marc Sheridan
The modern air traffic control tower at Barcelona El Prat airport, with white crossing supports, beside the runway

Our Raspberry Pi plane radar guide shows how to catch the signals planes broadcast and watch them on your own live map. Here’s what to buy for it, plus the cable that’s easy to forget.

How we chose: we did not build this ourselves. The list comes from FlightAware’s build guide and its Pro Stick pages. Prices move often, so follow the links for today’s price. Price ranges: Budget = under $100, Mid-range = $100-300, Premium = over $300.

Shopping list

Part Do you need it? Our pick Price range
Board Yes Raspberry Pi 4, 2 GB Budget to Mid-range
Power Yes Official 15 W USB-C supply Budget
Memory card Yes Samsung EVO Select 64 GB Budget
USB radio Yes FlightAware Pro Stick Plus Budget
Antenna Yes FlightAware 1090 MHz, 66 cm Budget
Antenna cable Yes, check your connectors N male to SMA male Budget

The software is free. Together, the parts land in our Mid-range band.

Diagram: antenna, cable and USB radio connect to the Raspberry Pi 4, which also takes the power supply, memory card and router
How the six parts connect · Illustration by DIGITAL WOXTER TECHNEWS.

The board: Raspberry Pi 4

A real Raspberry Pi 4 Model B board seen from above
The Raspberry Pi 4 Model B · Photo: Laserlicht, Wikimedia Commons, CC BY-SA 4.0.

The Raspberry Pi 4 with 2 GB is on FlightAware’s list of boards and has power to spare. Already own a Pi 3 or Pi 4? Use that. Flightradar24’s Pi24 accepts a Pi 3B+ or newer, while FlightAware’s page doesn’t list the Pi 5.

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Power: official 15 W supply

The Raspberry Pi 15 W USB-C power supply gives a Pi 4 the 5.1 V and 3 A it’s designed for. The Pi also feeds the USB radio, so a weak phone charger is a false economy. Check the listing, and in Europe make sure the plug suits your sockets.

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Memory card: Samsung EVO Select

FlightAware asks for 8 GB or more, so the Samsung EVO Select 64 GB is more than enough. Writing the image erases the card, so don’t reuse one with photos on it.

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USB radio: Pro Stick Plus

The FlightAware Pro Stick Plus is made for this job, with a 19 dB amplifier and a built-in 1090 MHz filter that helps in cities. In the countryside, FlightAware generally advises against filtering, so its plain Pro Stick may suit you better. Don’t buy the Nooelec NESDR SMArt XTR: Nooelec itself doesn’t recommend it for ADS-B.

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Antenna: 1090 MHz, 66 cm

The FlightAware 1090 MHz antenna is 66 cm long and tuned for this frequency. It’s the part that most affects how far you can see, so if you have to spend a little more somewhere, spend it here. FlightAware says a clear line of sight to the sky matters most, and that outdoor setups reach furthest.

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The cable that’s easy to forget

The stick has an SMA socket, and larger outdoor antennas often use a bigger N connector. If yours does, you need a low-loss N male to SMA male cable. Check three things first: the connector on your antenna, the length, and that it says SMA, not RP-SMA. Keep it as short as you can, because every metre loses signal.

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Upgrades for later

  • A small screen: FlightAware has an image for a 3.5-inch Waveshare display.
  • Surge protection: FlightAware lists a surge suppressor as an option for outdoor setups.
  • A case: a basic Pi 4 case keeps off dust and fingers, but it isn’t essential.

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Disclosure: this article contains affiliate links

If you buy through them, DIGITAL WOXTER TECHNEWS may earn a commission at no extra cost to you. Our picks are based on specifications, prices and published reviews, not on any payments. As an Amazon Associate I earn from qualifying purchases.

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