modifying minty boost circuit

Discussion in 'The Projects Forum' started by lokeycmos, Dec 28, 2011.

  1. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
    im building the minty boost circuit version 3 here:

    if you scroll down to the bottom of the page to the version 1 schematic, it has a low battery led. this is composed of LED1, R1,R2, and R3.

    id like to add this feature to the version 3 schematic. can i simply add this? will the rest of the circuit operate the way it should?

    edit:crap, i just noticed that version 3 and version 1 are 2 different ICs. wondering if this feature is even possible with version 3 IC?
  2. SgtWookie


    Jul 17, 2007
    The LT1302-5 used in version 2.0 and 3.0 does not have the LBI and LBO function pins.

    It COULD be added, but you would need to add a comparator IC, a voltage reference, a couple of resistors to divide the battery voltage, an LED and a current limiting resistor for the LED. It wouldn't fit on the same board.