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16 May 2014

2014-05-14-20-33-36

LiPo Booster -

LiPo  Booster is a breadboard-friendly boost converter board based on the TPS61230 IC from Texas Instrument. It has an output voltage of 5V, and is designed to be used with a single cell LiPo battery.

For normal and half size breadboards, the LiPo Booster can be plugged into the power rails without blocking the vertical 5-pin strips. It can also be used with a tiny breadboard or breadboard of any sizes as shown below.

LiPo Booster - [Link]

30 Apr 2014

ypod_board

by mictronics.de:

This page is related to the yamppPod (yPod) MP3 player project of Jesper Hansen at www.yampp.com  The hardware of this player is based around an Atmel ARM7, here AT90SAM7S128 and the VLSI VS1033 MPEG3 codec. Powered by a single LiIo/LiPo battery, the player also includes a color LCD, a 5-way switch for user inputs and a TWI EEPROM to store settings. A Micro SD card slot provides access to the music and system files stored a simple Micro SD card. Recharging the battery as well as data exchange with a PC is done by the USB interface available via mini-USB connector. A 3.5mm stereo jack provides the audio signal for headphones or any kind of amplifier. And everything located on a tiny 4-layer PCB.

yamppPod MP3 Player - [Link]

30 Oct 2013

2013-03-17-14.48.42_small-600x450

Xose Perez of Tinkerman has written an article detailing the build of his weather station:

Arduino FIO based weather station with a DHT22 temperature & humidity sensor and a BMP085 barometric pressure sensor. The whole sensor will be powered by a solar panel (doubling as irradiance sensor) and backed by a LiPo cell.

[via]

Weather station - [Link]

11 Feb 2012

Wade made a tiny Arduino compatible board. It has 8 Digital I/O pins, 4 Analog pins, and an on-board lipo charger.  The ATmega32U4 microcontroller has more memory than the original Arduino. [via]

Digital pins 0-7, Analog 2-5, and a RST, V+, and GND pin are broken out to two rows of pins, maintaining about half the pins in a familiar shape and organization. A JST connector for LiPo batteries like the ones available through SparkFun and Adafruit and an MCP73811/2 charger circuit makes the Demiduino well suited for portable applications. On the back, I’ve also included CR1225 clips for ~3v3 power from easy to find coin cell batteries, and a power switch to save battery life.

Demiduino, another tiny Arduino compatible board - [Link]


11 Feb 2012

Paul Asselin has written a description of his design of a USB Lithium Polymer battery charger – [via]

I wanted to build a cheap USB LiPo charger and didn’t like the unavailability nor the price of the Maxim’s MAX1555. Searching for something better, I stumbled upon the Microchip MCP73831. It is still way too expensive in single quantities but there ain’t too many options.

The board is intentionally small and has a status LED. There really isn’t much more to it, it’s a single purpose device and just does the job. It is proudly Open Source Hardware.

LiPo USB charger using the MCP73831 - [Part1]+[Part2]

23 Sep 2010

This project is a tiny, lightweight LiPo battery voltage monitor/alarm system based on PIC microcontroller. [via]

This simple PIC project includes a simple A-to-D application that measures the voltage of a battery pack via a resistor divider network, compares it to a reference voltage (5v regulator) and then displays the battery voltage on 2 LEDs (indicating battery voltage strength).

Simple-Volt: LiPo Monitor System – [Link]

26 Aug 2010

In this youtube video watch what happens when you overcharge a LiPo battery. As you understand a  LiPo battery is extremely hazardous if mishandled. Please pay attention to the warnings for this type of battery!

LiPo Battery explosion - [Link]

9 Aug 2010

This project describes how to build a portable solar charger tracker. It analyses the charging process. This unit connects with a small solar panel and a LiPo battery and keep track of solar panel voltage, battery voltage and current goes through the panel to battery charger. The design is intended for 6V panels and single cell LiPo batteries but can be adapted for any kind of panel and charger. Device is powered from batteries and uses Arduino Duemilanove. [via]

Portable solar charging tracker - [Link]

18 Oct 2009

l_dsc_0100

Alex at Tinkerlog writes:

For my latest projects I used a lot of single cell LiPo batteries. They are really nice. High power density, low self-discharge, no memory effect and they can deliver quite an amount of current. But LiPo battery handling is a bit more complicated than other rechargeable batteries. You have to take care of under voltage and over charging as that may destroy the battery.

I used the Sparkfun LiPoly charger, based on MAX1555, for some time and it works really well. The only thing I missed was a way to control the current. After some research I decided to try another chip, the Microchip MCP73833. [via]

LiPoly charging with MCP73833 - [Link]

31 Oct 2008

Fast charger for NiCd, NiMh, LiPo and SLA batteries

The Universal Charger usage is very easy but some point must be strictly followed in order to avoid any problem in battery and charger management. First read the charger documentation, then follow these recommendations in order to have a good charger usage.

Universal Charger – [Link]



 
 
 

 

 

 

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