Most suitable driver chip

Started by Unknown ●May 22, 2008

Reply by ●May 27, 20082008-05-27

On May 27, 6:49=A0pm, Tom=E1s =D3 h=C9ilidhe <t...@lavabit.com> wrote:
> Here's what I'm thinking of going with for the display:
>
> http://users.imagine.ie/toe/led_display.bmp

Ah crap I spoke too soon. I want to be able to turn both LED's off by
setting the uC pin to high impedence.

Maybe I should add a pull-up/pull-down resistor to the microcontroller
and then replace one of the FET's with a BJT?

Reply by Ben Bradley ●May 28, 20082008-05-28

On Tue, 27 May 2008 10:57:18 -0700 (PDT), Tom&#4294967295;s &#4294967295; h&#4294967295;ilidhe
<toe@lavabit.com> wrote:

>On May 27, 6:49&#4294967295;pm, Tom&#4294967295;s &#4294967295; h&#4294967295;ilidhe <t...@lavabit.com> wrote:
>> Here's what I'm thinking of going with for the display:
>>
>> http://users.imagine.ie/toe/led_display.bmp
>
>
>Ah crap I spoke too soon. I want to be able to turn both LED's off by
>setting the uC pin to high impedence.
>
>Maybe I should add a pull-up/pull-down resistor to the microcontroller
>and then replace one of the FET's with a BJT?

   Have you considered a 'high side' driver array such as the TD62783
instead of discrete components? It makes a good complement to the
2003/2803 series for array driving applications like this.