Neurolinks and Shabbos, Alexa and Shabbos, Electronics and Shabbos

Electronics activated through brainwaves is it permissible to use them on Shabbos?
Electronics activated through voice is it permissible to use them on Shabbos?

Using a whoop strap or a Fitbit
What is the issur of electricity?
Is there an Issur of increasing current to exisitng electricity?
What’s called a מעשה regarding מלאכת שבת?
Binyan in Keilim