Add Lectrobox org and PID 0x71C4 (LectroTIC-4 Pulse Timestamper)

1209/71C4/index.md

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+---
+layout: pid
+title: LectroTIC-4 4-Channel Pulse Timestamper
+owner: Lectrobox
+license: GPLv3
+site: https://lectrobox.com/products/timestamper/
+source: https://github.com/jelson/rulos/tree/main/src/app/timestamper
+---
+A four-channel zero-dead-time pulse timestamper with 4-nanosecond
+resolution. Hardware records the moment a pulse arrives on each of
+its four inputs against a 250 MHz counter disciplined to an external
+10 MHz reference clock, and streams the timestamps to the host as
+ASCII over USB CDC. The same USB endpoint accepts SCPI configuration
+commands (slope, divider, stream-enable).

org/Lectrobox/index.md

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+---
+layout: org
+title: Lectrobox
+site: https://lectrobox.com/
+---
+Lectrobox designs and publishes small open-source electronic
+instruments and gadgets. Hardware schematics, PCB layouts, and
+firmware are released under GPLv3 in the companion RULOS project
+on GitHub: https://github.com/jelson/rulos