I would attach e to ground and move the LED between c and the resistor.

Dan


On Tue, 23 Feb 1999 10:42:40 -0800, Lynx {Glenn Jones} wrote:

>Hello, everyon
>this will be used with a pic...
>
>What is the best way for puting a short duration, high current pulse
>through an IR LED for a 40KHz modulation remote? i was thinking of
>something like this...
>
>                           VCC
>                           |
>                           |
>                           /
>                           \  Small value Resistor
>                           /
>                           |
>                           |c
>                          /
>    Approx 10K Resistor |/
>>From PIC>----/\/\/\/----|    NPN (2N2222)
>                       b|\
>                         -\|e
>                          |
>                          |
>                         LED
>                          |
>                        -----
>                         ---
>                          -
>
>Is this the best way? I'd like to keep this inexpensive...
>
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