I am building a mobile IR-transmitter. It is going to be used outdoors with a rather high current through the LED. In my first prototype i used a 9V battery to a 5V vreg. Then there is a PIC12F675 controlling the LED. I am using a transistor connected to the PIC with a 20 ohm resistance between the LED and +5v. That would be 250 mA through the LED.
Can a 9V battery deliver that much current? It is only for a short while (2 us) the LED is on. Then it is of much much longer (24 us). I thought it might be better to use AAA batterys? To use 3 of them insted of one 9V battery. Can a AAA battery deliver more current than a 9V?
What do you think?
Can a 9V battery deliver that much current? It is only for a short while (2 us) the LED is on. Then it is of much much longer (24 us). I thought it might be better to use AAA batterys? To use 3 of them insted of one 9V battery. Can a AAA battery deliver more current than a 9V?
What do you think?