I'm building an array of LEDs on parallel circuits.
I'm new to electronics and am trying to figure out how many 100mA LEDs I can place in each row, and perhaps what kind of resistor I might need at the beginning of each row. You see one row in the diagram. Several rows will be connected together (above and below the diagram, from the same power source).
Here's a diagram, with the |+| representing a positive wire connection to an LED and a |-| representing a negative wire connected to the LED. The 4.0V power source is on the far left. The // marks where I'd put a resistor if I need it.
LED characteristics:
* 3.4V forward voltage
* 100mA
+//++++++++++++++++++++++++++++++++ cathode
+ . . . . |+| . . . . . . . |+| . . . . . |+|. . . . . . .|+|. . . . . . .
[4.0V] (LED 100mA)(LED 100mA)(LED 100mA)(LED 100mA) etc...
- . . . . |-| . . . . . . . |-| . . . . . .|-| . . . . . . .|-|. . . . . . .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - anode
I'm new to electronics and am trying to figure out how many 100mA LEDs I can place in each row, and perhaps what kind of resistor I might need at the beginning of each row. You see one row in the diagram. Several rows will be connected together (above and below the diagram, from the same power source).
Here's a diagram, with the |+| representing a positive wire connection to an LED and a |-| representing a negative wire connected to the LED. The 4.0V power source is on the far left. The // marks where I'd put a resistor if I need it.
LED characteristics:
* 3.4V forward voltage
* 100mA
+//++++++++++++++++++++++++++++++++ cathode
+ . . . . |+| . . . . . . . |+| . . . . . |+|. . . . . . .|+|. . . . . . .
[4.0V] (LED 100mA)(LED 100mA)(LED 100mA)(LED 100mA) etc...
- . . . . |-| . . . . . . . |-| . . . . . .|-| . . . . . . .|-|. . . . . . .
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - anode