ULN2803 confusion
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In the basic stamp appnotes there is a trainset controller setup using a
ULN2803. It shows Pin 10 of the 2803 going to ground. My understanding of the
clamp diodes is that your could connect pin 10 to the +12v, not ground - to
short out the reverse voltage caused by noisy components de-energizing.
Since this is powering rails, I'd imagine there'd be no reverse voltage... Is
that why its grounded instead of going to +12?
http://www.parallax.com/Downloads/Documentation/bs/mod/BASIC_Stamp_1_App_Notes_V\
1-9.pdf Page 179
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ULN2803. It shows Pin 10 of the 2803 going to ground. My understanding of the
clamp diodes is that your could connect pin 10 to the +12v, not ground - to
short out the reverse voltage caused by noisy components de-energizing.
Since this is powering rails, I'd imagine there'd be no reverse voltage... Is
that why its grounded instead of going to +12?
http://www.parallax.com/Downloads/Documentation/bs/mod/BASIC_Stamp_1_App_Notes_V\
1-9.pdf Page 179
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
previously acknowledged by Paralllax reps. ULN2803 pin 10 should go
to +12V, not gnd.
Regards,
Steve
On 30 Jun 03 at 10:51, pm wrote:
> In the basic stamp appnotes there is a trainset controller setup
> using a ULN2803. It shows Pin 10 of the 2803 going to ground. My
> understanding of the clamp diodes is that your could connect pin 10
> to the +12v, not ground - to short out the reverse voltage caused by
> noisy components de-energizing.