Histórico do passo nº 13 do guia Apple Watch Series 4 Teardown

Alterações no passo nº 13

Edição por Sam Goldheart — 23 de set de 2018

Edição aprovada por Sam Goldheart

	[* black] Apple upped its heart rate sensing game, adding electrical tracking ([https://en.wikipedia.org/wiki/Electrocardiography\|ECG\|new_window=true]) to its previous optical tracking sensors.
	[* icon_note] The Apple Watch is a [https://en.wikipedia.org/wiki/Electrocardiography#Limb_leads\|Lead I\|new_window=true] ECG, which means it's only measuring between the right and left arms. The first electrode is the Watch back pressed against your wrist, the second is the crown, held by your opposite hand's fingers.
	[* black] These electrodes detect the tiny changes in electrical polarization across your skin while your heart beats. The watch then interprets that data to give you heart rate and other data.
	[* black] So, where's that wrist electrode? There are several ribbon cables that disappear into the glass, which may be providing conductors and insulators for this system.
-	[* black] This golden donut is ''likely'' an antenna, ~~but it would be way cooler if it were reading your electricity, wouldn't it?~~
+	[* black] This golden donut is ''likely'' a streamlined antenna, as we've not seen the [guide\|97521\|fiddly brackets\|stepid=179038\|new_window=true] of yesteryear.