Driving LED''s
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Posts: 46,084
While you're in the manual, take a look at the PWM command. With a resistor
and a cap, you can output an analog value from a Stamp pin. For more
precision, you might consider an A2D convertor.
You might also check your display specs. If you have direct control over the
segments, the MAX7219 will probably do the trick.
-- Jon Williams
-- Parallax
In a message dated 1/15/02 2:26:42 PM Central Standard Time, chapman@t...
writes:
> A Basic Stamp I/O is a digital output, logic 0 is zero volts and logic 1 is
> +5 volts. TTL-level, 0-5 volts. Look at table1.2, page 11 of BASIC STAMP
> MANUAL Version 2.
>
Original Message
> From: "naylor_nick" <naylor_nick@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Tuesday, January 15, 2002 10:19 AM
> Subject: [noparse][[/noparse]basicstamps] Driving LED's
>
>
> > Hello,
> > Here is the situation. I am trying to use a Basic Stamp to
> > drive a 3.5 digit LED display. Can this be done? I have no idea
> > how it coul dbe done. However, I do have an A/D converter IC that
> > also has 3.5 digit drivers on it. That is controlled with a
> > voltage, 200mV max. Can the basic stamp output a certain voltage on
> > a certain I/O line? Can anyone point me to a website that might
> > help me out?
>
[noparse][[/noparse]Non-text portions of this message have been removed]
and a cap, you can output an analog value from a Stamp pin. For more
precision, you might consider an A2D convertor.
You might also check your display specs. If you have direct control over the
segments, the MAX7219 will probably do the trick.
-- Jon Williams
-- Parallax
In a message dated 1/15/02 2:26:42 PM Central Standard Time, chapman@t...
writes:
> A Basic Stamp I/O is a digital output, logic 0 is zero volts and logic 1 is
> +5 volts. TTL-level, 0-5 volts. Look at table1.2, page 11 of BASIC STAMP
> MANUAL Version 2.
>
Original Message
> From: "naylor_nick" <naylor_nick@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Tuesday, January 15, 2002 10:19 AM
> Subject: [noparse][[/noparse]basicstamps] Driving LED's
>
>
> > Hello,
> > Here is the situation. I am trying to use a Basic Stamp to
> > drive a 3.5 digit LED display. Can this be done? I have no idea
> > how it coul dbe done. However, I do have an A/D converter IC that
> > also has 3.5 digit drivers on it. That is controlled with a
> > voltage, 200mV max. Can the basic stamp output a certain voltage on
> > a certain I/O line? Can anyone point me to a website that might
> > help me out?
>
[noparse][[/noparse]Non-text portions of this message have been removed]