Please help a Student with a circuit
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Posts: 46,084
Hello all,
I'm a new student trying to use basicstamp to drive an ultrasonic
sensor(panasonic). So I need help in finding circuits. I need to
drive the sensor with a transmitter circuit(40Khz). I also need a
receiver circuit that will connect to the basicstamp. Please help
ASAP if you can.
Kindest Regards,
Andrew O.
I'm a new student trying to use basicstamp to drive an ultrasonic
sensor(panasonic). So I need help in finding circuits. I need to
drive the sensor with a transmitter circuit(40Khz). I also need a
receiver circuit that will connect to the basicstamp. Please help
ASAP if you can.
Kindest Regards,
Andrew O.
Comments
by Scott Edwards. The code is for the BS1 so you may need to update it if
you're using a different Stamp.
http://www.parallax.com/Downloads/Documentation/bs/mod/BASIC_Stamp_1_App_Notes
_V1-9.pdf
-- Jon Williams
-- Parallax
In a message dated 4/29/2003 9:38:00 PM Central Standard Time,
aolowu@y... writes:
> Hello all,
> I'm a new student trying to use basicstamp to drive an ultrasonic
> sensor(panasonic). So I need help in finding circuits. I need to
> drive the sensor with a transmitter circuit(40Khz). I also need a
> receiver circuit that will connect to the basicstamp. Please help
> ASAP if you can.
> Kindest Regards,
> Andrew O.
[noparse][[/noparse]Non-text portions of this message have been removed]
With regard to the BS1 app note by Scott Edwards that Jon mentioned:
A lot of it has to do with the adjusting the '555 timer and the '567
PLL to produce exactly 40 khz. With the BASIC Stamp 2, you can use
the COUNT command to do the calibration. The BS1 did not have that
command. Be very careful with the layout of the circuit. Do not
attempt to build it on one of those white plugboards. It should be
constructed with short point to point wiring.
Also, the op-amp specified is out of date. For that kind of circuit
a simple CMOS inverter operated in linear mode provides plenty of
gain. The following provides over x1000 gain:
1M 1M 1M
;-/\/\--; ;-/\/\--; ;-/\/\--;
| | | | | |
| |\ | | |\ | | |\ |
microphone -o--| >o-o-||--o--| >o-o-||--o--| >o-o--- to '567 PLL
|/ .001 |/ .001 |/
-- regards,
Tracy Allen
electronically monitored ecosystems
mailto:tracy@e...
http://www.emesystems.com
>You'll find a circuit in the original BASIC Stamp applications notes create
>by Scott Edwards. The code is for the BS1 so you may need to update it if
>you're using a different Stamp.
>
>http://www.parallax.com/Downloads/Documentation/bs/mod/BASIC_Stamp_1_App_Notes
>
>_V1-9.pdf
>
>-- Jon Williams
>-- Parallax
>
>In a message dated 4/29/2003 9:38:00 PM Central Standard Time,
>aolowu@y... writes:
>
> > Hello all,
> > I'm a new student trying to use basicstamp to drive an ultrasonic
> > sensor(panasonic). So I need help in finding circuits. I need to
> > drive the sensor with a transmitter circuit(40Khz). I also need a
> > receiver circuit that will connect to the basicstamp. Please help
> > ASAP if you can.
> > Kindest Regards,
> > Andrew O.
>
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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