Uploaded January 2026 | Updated September 2026, 2 weeks ago

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I waited far too long to buy one of these portable oscilloscopes.

The FNIRSI 2C53T is $90 on Amazon: amzn.to/49BxVJA (Amazon affiliate link)

Here are the other videos I referenced:

- Branchus Creations' overview of the 2C53T: youtube.com/watch?v=RyU4aKOZWcY
- Matthias Wandel's review of the DPOS350P: youtube.com/watch?v=dcexJ4CTvOg
- My previous video on the Pico GPS clock: youtube.com/watch?v=w_EJMtji93g

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Contents:

00:00 - FNIRSI 2C53T
01:45 - Testing timing
03:05 - Probe setup
04:54 - Triggering on nanoseconds
07:22 - Cable length matters
08:45 - Quick summary of the oscope
09:31 - 3D printed clock LCD filter update
10:09 - Testing the signal generator (sine wave)
12:12 - Other waveforms
14:02 - When 1 Hz is actually 2 Hz