Chaos142/LottBespittingDiode — reverse-engineered prompt

Build me the Lott Bespitting Diode project, a browser controlled infrared blaster for my own devices and authorized testing only.

I want to plug an RP2040 based IR blaster into my computer over USB, open a web control page in a Chromium browser, press a Connect button, then send standard 38kHz IR commands to the hardware. The page should feel like a simple control panel, with a place to enter raw NEC address and command values, browse or load saved IR code data if available, and show clear connection and send status.

Please also create the CircuitPython firmware that listens over USB serial, understands the incoming command strings, and drives the IR output with accurate NEC timing and carrier modulation for a MOSFET driven IR LED array.

Include clear setup instructions for prebuilt hardware and for flashing a fresh RP2040 board with CircuitPython. Add safety and legal warnings that this is only for equipment I own or have permission to test.