open-reverse-logic

Reverse-engineering "Logic" e-cigarette with open-source alternative

Introduction

I was bored.
Got a broken spare, but main IC had its pin eaten by corrosion. Since I can't do bonding-wire-level soldering I decided to sacriface this one.

Description

The circuit is actually very, very simple.
There are 5 main subcircuits:

• battery (-) isolation
• output
• charger
• piezo input
• indicator LEDs

The circuit seems a bit messy now. I'm trying to figure out parts used in this.
Unfortunately finding exact parts will be a bit hard (SOT-xx markings, eh?), but I feel like some people might find something suitable based on their experience.

Open Source?

Yeeeeeah. Another project I'm going to start and abandon after a week. It's nothing hard though. Once "somewhat suitable" parts are found, the rest of the work boils down to redoing the PCB.

Contents

Just a schematic. For now. Let's see if this takes off.