Hardware Upgrade Forum - View Single Post - [Thread Ufficiale] Pile/Batterie ricaricabili

nicola1985 · 31-03-2009, 20:46

Ho letto con + attenzione e dice proprio quello che pensavo...l'attacco diretto causa lo sfarfallio dei led.per questo il tipo ha costruito quella schedina!vi dovrebbero essere dei diodi di non ritorno...

At first I simply direct drove them off the power supply voltage. Again, I'm not a fan of direct drive but there was no possibility of destroying the LEDs since the supply voltage was at most 2.85V with my modified supply. This setup worked OK except that the voltage fluctuations when the BC900 was in charge mode caused the backlight to flicker. I decided that I couldn't live with this so I made a step-up constant current driver board. The LED array is now driven at 60 mA, or about 8.5 mA each, regardless of the supply voltage.

31-03-2009, 20:46	#2134
nicola1985 Senior Member Iscritto dal: Mar 2003 Messaggi: 5494	Ho letto con + attenzione e dice proprio quello che pensavo...l'attacco diretto causa lo sfarfallio dei led.per questo il tipo ha costruito quella schedina!vi dovrebbero essere dei diodi di non ritorno... At first I simply direct drove them off the power supply voltage. Again, I'm not a fan of direct drive but there was no possibility of destroying the LEDs since the supply voltage was at most 2.85V with my modified supply. This setup worked OK except that the voltage fluctuations when the BC900 was in charge mode caused the backlight to flicker. I decided that I couldn't live with this so I made a step-up constant current driver board. The LED array is now driven at 60 mA, or about 8.5 mA each, regardless of the supply voltage. Ultima modifica di nicola1985 : 31-03-2009 alle 20:53.