--- In "Juan Franco" <> wrote:
> Hello,
>
> You can use a transistor to drive the relay´s inductor. Can you
say me what
> voltage level does TS-72x0 DIO have? (5V or 3.3V)?
>
> Tomorrow I can you a schematic.
>
Juan:
Thanks for the offer. This is what I am trying to achieve:
output LED
from +------>|-------+
hdr | | R (6K or something)
------+ +---^v^v^v---------------
+ | | to hdr gnd
+-----/ --------+
input sw
That way I can use the same setup for input and output without
worrying about frying the board. I will have a switch panel
connected to the 16-pin DIO header. My concern is that if a pin is
programmed for output, and someone (me most likely) inadvertently
flips the switch, the output will be shorted to ground... This
would most likely result in a blown board....
The DIO header on the board is 3.3V. Eventually, in the production
version, the LED will be replaced by a opto-isolator, solid state
relay, or similar and the switch will go away. For testing, though,
I want to make this relatively idiot proof.
Thanks,
--Yan
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