Basic Elektrical Repair

https://en.wikipedia.org/wiki/Wireless_powerline_sensor https://www.jameco.com/Jameco/workshop/jamecofavorites/non-contact-AC-voltage-detector.html https://www.mdpi.com/1424-8220/19/8/1812 https://www.bosch-professional.com/gb/en/community/category/gsb-180-li-vs-gsb-18-v-ec/14461550-t#/main More important "soft" torque is higher in both the old and new GSB 18 V-EC models compared to the GSB 180-LI.  The max torque is a hard joint, for example if there are two similar drills, one with a light plastic chuck and the other with a "heavier" metal. The metal chuck drill usually has a higher "hard/max" torque.   Also the weight differences between the carbon brushed electric motor and brushless. ( rotating masses ) I would buy a cheaper model if the price difference is significant.  https://www.bosch-professional.com/gb/en/community/category/why-the-different-professional-range/385576-t#/main Very confusing model name / brand code https://www.youtube.com/watch?v=...

    My friend Apple Watch Series 4 have boot loop problem. It turn out that power button shorted or something wrong with it. After disconnect power button cable (that come with Mic...), the watch turn on normally. Apple Watch power button part replacement. I can not found or not have enough time to order replacement part, so I let the watch work without power button (and Mic too). The attempt on repair this minuscule button is for diagnostic only, since it is hard to find replacement part (recently I fond some but not all can by ordered). Since I need this power button to do hard reset (this require both Crown button and power home button press together as I remember). https://www.deviceparts.com/power-button-flex-cable-for-apple-watch-series-4-40mm-ori-r.html => deviceparts.com seem only for Shop/Whole store buy or personal buyer but with minimum $150 order (without shipment :( ? ). https://www.impextrom.com/en/power-switch-flex-for-apple-watch-4-gps-wifi-a1977-40mm-p10000...

https://ecee.colorado.edu/~bart/book/book/chapter7/ch7_3.htm https://cnx.org/contents/6dHkc9zc@1.48:GYAoAVIF@8/6-5-Equipotential-Surfaces-and-Conductors https://semiengineering.com/why-euv-is-so-difficult/ https://sea.pcmag.com/feature/19648/the-promises-and-challenges-of-euv-at-globalfoundries https://www.extremetech.com/computing/162376-7nm-5nm-3nm-the-new-materials-and-transistors-that-will-take-us-to-the-limits-of-moores-law Chenming Hu - Taiwanese-American - Father of FinFET.