tom303 Posted June 6, 2003 Report Share Posted June 6, 2003 Hi all,when I mute all 16 buttons (leds are on) my midibox freezes after ca. 45 sec. (lcd light off and no function)Anyone knows this problem? - Please help!Thomas Quote Link to comment Share on other sites More sharing options...
lemonhorse Posted June 7, 2003 Report Share Posted June 7, 2003 Hi Thomas,I guess your MB Powersupply (+5V) goes down when all the LED's switched on - in this case a heat sink element (for the 7805) is a potential solution...Good Luck!- Lemonhorse Quote Link to comment Share on other sites More sharing options...
tom303 Posted June 8, 2003 Author Report Share Posted June 8, 2003 :DThank you! It looks like I use to much power. It's better now, but the 7805 is still getting very hot. Maybe I have to use low power leds...Thomas Quote Link to comment Share on other sites More sharing options...
LO Posted June 8, 2003 Report Share Posted June 8, 2003 Rather than using low power LEDs I think you can just use a larger value (or extra)Resistor? Quote Link to comment Share on other sites More sharing options...
pilo Posted June 8, 2003 Report Share Posted June 8, 2003 Maybe build another power suplly for the dout module... (with an other 7805)...a led need 0.025A, or less (0.01), the 7805 is for 1A max (0.5A is good)... so with the 220 resistor on the DOUT, you have 0.022A per leds, which make 44 leds max! (44 led on at the same time).And I don't care about the rest of the midibox! (LCD, pic ect...) Quote Link to comment Share on other sites More sharing options...
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