25,759 Stars, a $3,991 Bare-Board Quote and a '20 km' Figure That Is Really a Timing Limit: Auditing the Open-Source AERIS-10 Radar

Tue, 29 Sep 2026 00:00:00 +0000

A GitHub repository called PLFM_RADAR currently has 25,759 stars, 5,886 forks and a one-paragraph pitch that would be remarkable even if half of it were true: an open-source, low-cost 10.5 GHz phased array pulse-LFM radar, published with schematics, Gerbers, BOMs, FPGA Verilog and a Python GUI. Two versions — a 3 km “Nexus” and a 20 km “Extended”. The press picked it up in April with the headline “Open-source DIY radar that’s 95% cheaper than $250k commercial offerings”.

That framing is where the trouble starts, because the repository itself is a very different document from the marketing. It is also, on balance, a more interesting one: a 225 MB open-hardware project where you can watch a solo engineer, an AI-assisted contributor pipeline and a group of strangers on the issue tracker try to converge on a buildable X-band radar at the same time.

PLFM_RADAR on SoloSoft

25,759 Stars, a $3,991 Bare-Board Quote and a '20 km' Figure That Is Really a Timing Limit: Auditing the Open-Source AERIS-10 Radar