Uploaded April 2018 | Updated September 2026, 1 week ago

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Followup-video to this one: youtu.be/vudfIq6PQMw

Support Roger on Patreon: patreon.com/kainkalabs

Additional info: It looks like the thermo-couple integrated in the tip is not a Type-K but a Type-N, which has a lower sensitivity.
That explains the measured sensitivity and the unlinearity/offset at 200°C and 350°C. It´s in perfect agreement with the published sensitivity when the unlinearity is not taken into account by softare.
Some more tests, comparison to original PCB, circuit analysis and ideas for simple improvements.
Related videos:
Original teardown: youtu.be/vudfIq6PQMw

Genuine Hakko FX-951 teardown from jwrelectro:
youtu.be/YYZs_pewRd4
Additional info/files from jwcelectro for the FX-951:
tigermultimedia.com/hakko-fx-951-soldering-station
Schematics & Datasheets of the fake FX-951:
kainkalabs.com/upload/index.php?f=15ad0d22095847

ATTEN AT-80D reverse-engineering + fixing the problems:
youtu.be/hQY4sKDlp3I

Support Roger on Patreon!
patreon.com/kainkalabs