If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The USB LiPo Charger is a basic charging circuit that allows you to charge 3.7V LiPo cells at a rate of 500mA or 100mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries.
This 0.5W, 8Ohm speaker is only 40mm in diameter and just over 4mm thick. If you want to get some sound out of your project but have a tight space budget, this is a good way to do it.
This is a 1 inch single sided square protoboard. Standard 0.1" spacing with a 4-40 (3mm) hole for mounting. Every three holes are connected with a 20mil trace.. sold in package of 2.
