Ways of checking logic level of BS2 output??
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Hi,
I need to check wif u pple on how to check e logic levels of a
BS2 o/p. Do I really need a logic probe?
The logic pen got a red and black connection. How do I power it up?
Blur
I need to check wif u pple on how to check e logic levels of a
BS2 o/p. Do I really need a logic probe?
The logic pen got a red and black connection. How do I power it up?
Blur
Comments
You can check logic levels with a simple
LED circuit -- put a 480 ohm resistor in
series with the LED, then put it across
the data pin and ground. If you 'know'
the pin is high, and it doesn't light,
you may have the LED backwards -- swap
leads, and it should light.
Make sure you use 'HIGH P0', or insure
you set that pin to an output first.
--- In basicstamps@yahoogroups.com, "barangsg" <barangsg@y...> wrote:
> Hi,
> I need to check wif u pple on how to check e logic levels of a
> BS2 o/p. Do I really need a logic probe?
> The logic pen got a red and black connection. How do I power it up?
>
>
>
>
> Blur
(pen-style). I got one and it saved lots of trouble having a reliable
instrument to verify logic levels. Furthermore, the probe I have also
provides a tone signal which is very convenient when you have to look
at anything else while measuring.
Many people today belive that logic probes are outdated (well they
may be not the right tool to check a 2GHz pentium), but I think this
is not true. They are in fact a valuable tool when used properly, e.g
with basic stamps.
Regards
Adrian
I've look around but only saw those tat hav a red n
black plug jacks at the connecting end. Used them b4
on those big troubleshooting board. How do I power
them up w/o the big board? Eg. Red jack to +ve of BATT
n Black to -ve of BATT? R there any types tat we
insert batteries into them n operate?
Thnks!
--- Adrian Schneider <adrian.schneider@t...>
wrote: > Beside what is already said, I recommend
using a
> true logic probe
> (pen-style). I got one and it saved lots of trouble
> having a reliable
> instrument to verify logic levels. Furthermore, the
> probe I have also
> provides a tone signal which is very convenient when
> you have to look
> at anything else while measuring.
>
> Many people today belive that logic probes are
> outdated (well they
> may be not the right tool to check a 2GHz pentium),
> but I think this
> is not true. They are in fact a valuable tool when
> used properly, e.g
> with basic stamps.
>
> Regards
> Adrian
>
>
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my logic proble is one with two leads - a red micro clip (+V) and a
black crocodile clip (GND) to power the probe. The probe usually
needs 5V at least for TTL or more (up to some 15V for CMOS). This
depends of the circuit under test. Batteries with sufficient supply
voltage are expensive, big and heavy and it is usually easier to get
the supply power from the circuit. Beside this you would need a
ground connection anyway.
Regards
Adrian