Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
It is for an electrinic cigarette, the battery works at 3.3v - 4.2v. Im trying to work it without the battery, through a usb. I cant get my probes in to measure the current from the battery when its used but when its on 5v it draws 0.85A, which is weird because i thought you could only get 0.5A from a usb, is this info any good?
A single Silicon rectifier will have a forward voltage drop of about 0.8V at 0.8A. A 1N5817 Schottky rectifier will have a forward drop of about 0.4V. Add one of each in series and you will drop the 5V to about 3.8V
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