July 16th, 2008

LiPo Balancer Element

LiPo Balancer Element

The LiPo balancer cell acts like a big and very accurate zener diode; when the cell voltage is under a threshold fixed by the user the system is in “idle state” and watch only for the voltage with a equivalent resistance of some KOhm and a negligible current shunt. When the voltage reaches the threshold the balancer element will start to shunt current from the cell with an internal power resistor: the amount of current sunk by the element is proportional to the cell overvoltage with respect the user “safe” threshold.

LiPo Balancer Element: [Link]

MAX6953 LED Matrix or development board

The MAX6953 from Dallas Maxim is a compact cathode-row display driver that interfaces a microprocessor (like PIC or AVR) to four 57 dot matrix LED display trough an I2C compatible serial interface. The Max chip includes some nice features like:

  • low-power shutdown mode
  • segment blinking
  • test mode that forces all LEDs on
  • 16-Step digital brightness control

This project can be considered both a led matrix controller and a development board for MAX6953. The project presents only the max6953 and the led matrix, if you want it to display anything, you’ll also need to stick a microcontroller in there and write some code. You might want to check this other article 507 LED Matrix which has everything included.

MAX6953 LED Matrix or development board: [Link]

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