EEVblog

µRuler International Deliveries

Has anyone received their rulers yet *outside* of Sweden? If so, could you please report in and if possible post a photo or let me know if it has a Swedish post mark on it like this. You can do this via twitter, this blog, Pozible comment, or this forum …

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EEVblog #544 – Fluke 5450A Resistance Calibrator Teardown

What’s inside a vintage Fluke 5450A Resistance Calibrator used in cal labs to calibrate multimeters? Schematic HERE Coto reed relay High Resistance measurement with a relay matrix: https://www.youtube.com/watch?v=fs2MfTW4o_Q https://www.youtube.com/watch?v=-mavHYV-H6o Forum HERE Podcast: Download

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First international µRuler has arrived

The first mailing house envelope has arrived, in Sweeden of all places, and then Singapore: No Australia on the return address, and they said they would print a barcode but didn’t. Perhaps that delayed the delivery?

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EEVBlog #543 – PCB VIA Current Investigation

Dave tests the myth that plugging a PCB VIA with solder does nothing (or not much) to improve the current handling capability. Is manual wire feed-through any better? Does the industry rule of thumb of 0.5A per VIA have any basis? What is the typical plated VIA/hole thickness? http://saturnpcb.com/pcb_toolkit.htm Previous …

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