This is the V2 version which supports either a CR2032 Battery or a Li Ion Battery. The charger for the Li Ion Battery is onboard.

A blinky badge based on the circuit design from this Youtube video. https://www.youtube.com/watch?v=vA7GH97h4tY&feature=youtu.be

BOM ( CR2032 Version)

• 6x BC847 SOT23 Small Signal Transistor

• 6x 0805 47uF Capacitor

• 6x 0603 10k Resistors

• 6x 0603 220-1k Resistors

• 6x 0603 SMD LED of your choice

• 1x CR2032 SMD Holder

• 1x SMD Slide Switch

BOM ( Li Ion Version)

• 6x BC847 SOT23 Small Signal Transistor

• 6x 0805 47uF Capacitor

• 6x 0603 10k Resistors

• 6x 0603 220-1k Resistors

• 6x 0603 SMD LED of your choice

• 1x Li Ion Battery

• 1x Green 0805 LED to denote charge completion

• 1x 1k 0402 Resistor

• 1x 2k( see Footnote 1) Resistor 0402 for 200mAh Charging current bias.

• 1x Micro USB Connector

• 1x MCP73831 or LTC4054 SOT23 Li Ion battery charger

• 1x SMD Slide Switch

Optional

• 6x 3mm LED

Footnotes

• Please check Charger chip datasheet to match 1C(or less) charging current for your battery.