July 22, 2010 AT 11:24 am

BACK IN STOCK – USB LiIon/LiPoly charger – v1.1!

Usblipo Lrg-1

BACK IN STOCK – USB LiIon/LiPoly charger – v1.1! This is a Lithium Ion and Lithium Polymer battery charger based on the MCP73833. It uses a USB mini-B for connection to any computer or ‘USB wall adapter’. Charging is performed in three stages: first a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up. The fast-charge current is 200mA by default, but is easily adjustable from 100mA up to 1000mA by soldering a through-hole resistor on-board. This board is great for DIY projects because it has 3 indicator LEDs – one for power, one for charging status and a third that indicates when charging is complete. Keep the battery connected to the charger and pass power through the additional JST connector using the included cable!

  • Comes assembled and tested with a free bonus JST cable!
  • 5V input via mini-B USB connector
  • For charging single Lithium Ion/Lithium Polymer 3.7/4.2v batteries (not for older 3.6/4.1v cells)
  • 200mA charge current, adjustable up to 1000mA by soldering in a resistor
  • Separate JST connectors for battery and load system so batteries don’t have to be removed for charging
  • Chip supports a 10K thermistor which we have stuffed as a plain 10K. For people who require temperature monitors (using high charge rates), remove the 10K and solder in the thermistor in its place
  • 0.1″ (2.54mm) pads next to the JST in case you want to use terminal blocks or connect it to a breadboard
  • Free 2-pin JST cable included!

Battery and USB cable not included (but they’re available in our store).


And these two books are back in stock too!

Parduinobook Med
Practical Arduino (Jon Oxer & Hugh Blemings)
This book is best used for people who’ve gone through our tutorials and want more! Please note that the book does not come with any electronic parts or hardware. You’ll probably want an Arduino starter pack or similar so that you have the Arduino, USB cable, power adapter, wires, and a protoshield. Read more


Makeelectronics Lrg
Make: Electronics (Charles Platt)
We checked out this book before putting it in the shop, its geared towards ultimate-beginners and teaches electronics starting from basic core of analog to some digital to microcontrollers. You’ll learn tools, prototyping soldering techniques, transistors, 555′s, etc. while completing useful projects. A nice and tidy intro! This book is a good accompaniment to learning microcontrollers/Arduino in that it fills the necessary electronics theory and background. Read more

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