Oscillo

Oscilloscope projects: one instrument — oscilloscope, spectrum analyser, logic analyser and meter — on a Raspberry Pi Pico 2 (PiLyzer) or an Arduino R4 (ArLyzer), and the applications that drive both.

Project	Hardware	Applications
Pico2	Raspberry Pi Pico 2, bare or behind a front end — the PiLyzer AFE, a one-op-amp mini AFE, or a picoLABO PL2407AFE; an original Pico too, bare or on the PL2407AFE	macOS · WebUSB
ArLyzer	Arduino Nano R4, UNO R4 Minima or UNO R4 WiFi — the same protocol as the Pico 2, up to eight analogue inputs and logic on D2–D9; the UNO R4 WiFi also over Wi-Fi	the same macOS · Web applications
PCBScope	PCBScope / DPScope SE	Native macOS HID application restored from the original project

Open PiLyzer Web · Download macOS releases · Watch the introduction (6 min, Japanese with English subtitles)

The build log, in English with Japanese subtitles: PiLyzer #1 · PiLyzer #2 · ArLyzer on three Arduino R4 boards

PiLyzer's firmware, KiCad schematics, documentation and native app now live under Pico2/; ArLyzer's sketch and the UNO R4 WiFi's Wi-Fi bridge under ArLyzer/. The Git repository remains at this level. Each native app is an independent Swift package; run its build commands from its own directory.

(cd Pico2 && ./Scripts/make-app.sh)
(cd PCBScope && ./Scripts/make-app.sh)

PiLyzer Web talks directly to the instrument in Chrome or Edge on a desktop computer — macOS, Windows and Linux alike, with nothing to install on any of them: WebUSB for a Pico 2 (firmware 1.6 and later), Web Serial for an ArLyzer. A Pico 2 W or an UNO R4 WiFi serves it itself over Wi-Fi, at http://pilyzer.local or http://arlyzer.local, so a phone or a tablet needs no USB at all. Demo mode also works without an instrument: Try demo in PiLyzer Web, and from 3.3.10 Start a demo in the middle of the Mac app's empty screen, each one click. Captured samples remain in the browser; CSV export saves them locally. From 3.3.6, the copy on GitHub Pages counts page views, and which way an instrument was connected (USB, serial or the demo), with Google Analytics. The copy a board serves, and one run locally, load nothing of the kind, and no samples, readings or device details are sent.