"Harley, Ageless Wings" wrote:

Paul...

Here is a low cost $69 pen type oscilloscope <<

>From the specifications section of their website:

Sampling Rates 50ns (20MSa/s) - 2ms
DC Band Width  DC - 5 Mhz
AC Band Width 100 Hz - 5 Mhz
A/D Converter 6-Bit resolution
RAM 128 Bytes
Input Coupling AC, DC, or GND (Ground)
Input Voltage Ranges
Note: All voltages measurements are referenced to 0V ground. The effective
ranges for AC volt measurements in DVM mode are 0.33V, 3.3V and 33V since
the peak-to-peak voltage must be digitized and converted to the RMS value.
1V, 10V, 100V
Trigger Definitions  Auto, Internal, External
Trigger Levels
Note: Level tolerances are dependent on the selected input voltage rang: 1V
+1V, 10V + 3V, 100V + 10V Six selectable levels
Trigger Modes  Continuous RUN/SINGLE Cycle
Display 16x64 dots resolution, LED backlighted
Serial Line 19.200 kBaud
7 Data Bits, 1 Stop Bit, No Parity
DVM Accuracy +2 to +5%
(depending on the parameter settings)
Power Supply 9 - 13 V DC
red (+) and black (-) alligator clips
Current Required Backlight Off = 12 mA Typical
Backlight On = 85 mA Typical
Dimensions (HWD) 6 ½ x 1 5/16 x ¾ in
(165 x 33x19mm)
Weight About 1 Ib, 14.4 oz. (86 g)
===========================================

And, it's not exactly $69...from their order page:
===============================================
20MSa/s Pen-Type Oscilloscope
osziFOX V5.0 2000 includes, PC-Software for MS-DOS and MS-Windows 3.1/95/98
on 3.5" disc, Manual in English on disc, Serial PC-Cable, Power Supply Cable
with Alligator Clips, Trigger and Ground Cable with clip. Packaged in full
color gift box 69.00

Battery Power Pack,
holds 2 AA-size batteries  9.99

Palm IIIc Software
includes 6ft Serial Cable 8.99

Select shipping and handling 14.00 (Fedex)
shipped by Federal Express anywhere in the U.S.or Canada within 3 days.
=================================================
They also have the 36 page operators manual available online...click on
"Downloads".

And, according to the distributor page, Radio Shack sells it. And, indeed,
on checking online, I find  it is available...but from online shopping
only ...not in their stores...for $79.99 plus shipping.

I'm interested....

Harley

Thanks for figuring out that web page. Had me mystified.

I don't think the amplifier is sensitive enough for the 
high speed pressure sensors but I am not sure about that yet.
All and all I think it better to pay a bit more and get a bit
more resolution and voltage amplification.

Paul Lamar

 
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