Guest ignamato Posted November 23, 2003 Report Share Posted November 23, 2003 Can I use a 9v battery for the MIDIBOX64?? Quote Link to comment Share on other sites More sharing options...
Steven_C Posted November 23, 2003 Report Share Posted November 23, 2003 Ignamato-it will go flat too quickly. (maybe after an hour or less)I successfully used (6x) AA batteries, and my MB64 also had a backlit 2x16 LCD. This lasted about 12 hours continuous use, but I never actually timed this! Quote Link to comment Share on other sites More sharing options...
pay_c Posted November 23, 2003 Report Share Posted November 23, 2003 I already wrote something about that, here I go once again: Â ;DNiMH Accus:9V ~150mAh4x (or 6x) AAAs ~700mAh4x (or 6x) AAs ~2000mAhA normal MB64 (with all backlight and stuff) uses about 200 - 500 mA (the MOST goes into the Backlight).You just have to divide the mAh through your current and know how long your Box will be on. So with a 9V Accu it's gonna be even less than an hour!So: Current saving! Cut off the backlight! This saves a LOT!Second: Use low current LEDs (they just need 3mA to light up) - you got to change the values of the resistors on the DOUT (appr. 1k - 1,6k instead of 220)!!That way you can go down to about 100 mA current or even less (very dependable on the number of lighted LEDs)!That makes about: 9V: 1,5h, AAAs: 7h, AAs: 20h (!!!)To go even higher, just put 4x or 6x batteries in row (6V,9V) and parallel to those again 4x or 6x batteries - doubled mAh. (e.g.: 2 times 4x AAAs in parallel makes 6V at 1400 mAh)Greets! Â :)P.S.: Perhaps something for the FAQ? Quote Link to comment Share on other sites More sharing options...
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