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EEVblog

EEVblog 1476 – Keithley 515A Wheatstone Bridge TEARDOWN & TUTORIAL

Teardown of the Keithley 515A Megohm Wheatstone bridge, plus a tutorial on how Wheatsone bridges work and their applications. Manual & Schematic: https://download.tek.com/manual/515A(Model515A).pdf 1960’s Daven precision resistor and attenuator catalog: http://www.technicalaudio.com/pdf/Daven/Daven_attenuator_switch_lab_Catalog.pdf 00:00 Keithley 515A Megohm Wheatstone bridge 03:50 – The Magic smoke test 04:00 – Zero check test 04:40 – …

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EEVblog 1475 – What’s This SMD Part?

Answering another viewer question. Can we identify or find an alternative for this SMD part? https://twitter.com/PoiSolutionsLLC/status/1529065036433571840 Forum: https://www.eevblog.com/forum/blog/eevblog-1475-smd-part-indentification-substitution-search/ Youtube: Odysee: Podcast: Download

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EEVblog 1472 – Resistor Cube Problem SOLVED

How to solve the resistor cube problem using equipotential nodes, short and open techniques, and circuit simplification. Twitter: https://twitter.com/engineers_feed/status/1519561534787051521 Forum: https://www.eevblog.com/forum/blog/eevblog-1472-resistor-cube-problem-solved/ 00:00 – The Resistor Cube problem 04:28 – The SECRET to circuit simplification using equipotential nodes 06:04 – Analysis “by inspection” 14:22 – Summary of the solution 16:14 – …

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