Re: Multiplexing LEDs - calculating resistor value

On Tue, 27 Jun 2006 05:06:16 -0500, John Fields
<jfields@xxxxxxxxxxxxxxxxxxxxx> wrote:


COL48>-----------------------------------//----------+
|
COL02>----------------------+ |
| |
COL01>-------+ | |
| | |
[R1] [R2] [R48]
| | |
| | |
+5v>---------|----+---------|----+-------//----------|----+
| | | | | |
| E | E | E
+--B PNP1 +--B PNP2 +--B PNP48
C C C
| | |
[R49] [R50] [R96]
| | |
ROW1---+----------|---+----------|------//-----+ |
| | | | | |
+-[LED001]-+ +-[LED002]-+ +-[LED048]-+
| | |
| | |
| | |
ROW2---+----------|---+----------|------//-----+ |
| | | | | |
+-[LED049]-+ +-[LED050]-+ +-[LED096]-+
| | |
| | |
. . .
. . .
. . .

| | |
ROW8---+----------|---+----------|------//-----+ |
| | | | | |
+-[LED337]-+ +-[LED338]-+ +-[LED384]-+



--
John Fields
Professional Circuit Designer
.