PSN-L Email List Message

Subject: Re: Folded Pendulum Design
From: "Jonathan Peakall" jpeakall@............
Date: Sun, 16 Feb 2003 07:44:19 -0800


Brady,

>How would I go about integrating an A/D converter into my circuit that =
would have an output of >"  98156158 " for the values =
98, 156, 158?



You need a microcontroller, such as a Stamp or PIC. This reads the ADC =
and then sends the results and the control characters.



>How many samples per second does the 8 bit have compared to the 10 >bit =
and the 12 bit, and what exactly does bit mean?



Bits have nothing to do with sample rates. The sample rate depends on =
the ADC that you have. The 10 bit 12 bit thing has to do with the =
resolution of the ADC, not the speed. A 10 bit ADC returns (I believe) a =
number between 1 and 2048. A 12 bit returns a number between 1-4096. So =
smaller divisions can be acheived with an ADC with a higher bit rating.



HTH,



Jonathan



www.madlabs.info



  ----- Original Message -----=20
  From: Brady Romberg=20
  To: psn-l@.................
  Sent: Saturday, February 15, 2003 7:10 PM
  Subject: FW: Folded Pendulum Design


  I am currently a freshman at Colorado School of Mines and last =
semester for one of my classes I was required to design and build a =
working seismometer.  Our final design consisted of a folded pendulum =
which used magnetic induction, an amplifying filter circuit, an A/D =
converter, and Alan Jones' AmaSeis software.  I am continuing on with my =
folded pendulum design this semester and I am trying to make some =
improvements on it but I have some questions that I am having trouble =
finding the answer for so if anyone could help me find some answers I =
would really appreciate it. =20

  =20

  Where could I find a thin flexible metal sheet that I could use for =
the inverted pendulum joints?

  Where could I find what I believe is called a PZ electro crystal (the =
crystal that expands when it receives a current) for testing our unit?

  Where could I find information about optimizing the magnet / coil / =
damper system?

  How would I go about integrating an A/D converter into my circuit that =
would have an output of "  98156158 " for the values 98, =
156, 158?

  How many samples per second does the 8 bit have compared to the 10 bit =
and the 12 bit, and what exactly does bit mean?

  =20

  If you have any questions about my design, advice, or helpful =
information you can contact me at bromberg@............

  Thank you for your time.

  =20

  Brady Romberg

  =20










Brady,
 

>How would I go about = integrating=20 an A/D converter into my circuit that would have an output of = >=93  98<cr><lf>156<cr><lf>158=20 =93 for the values 98, 156, 158?

 

You need a = microcontroller,=20 such as a Stamp or PIC. This reads the ADC and then sends the results = and the=20 control characters.

 

>How many = samples per=20 second does the 8 bit have compared to the 10 >bit and the 12 bit, = and what=20 exactly does bit mean?

 

Bits have nothing = to do with=20 sample rates. The sample rate depends on the ADC that you have. The 10 = bit 12=20 bit thing has to do with the resolution of the ADC, not the speed. A 10 = bit ADC=20 returns (I believe) a number between 1 and 2048. A 12 bit returns a = number=20 between 1-4096. So smaller divisions can be acheived with an ADC with a = higher=20 bit rating.

 

HTH,

 

Jonathan

 

www.madlabs.info

 

----- Original Message -----
From:=20 Brady = Romberg=20
Sent: Saturday, February 15, = 2003 7:10=20 PM
Subject: FW: Folded Pendulum = Design

I am currently a = freshman at=20 Colorado School of Mines and last semester for one of my classes I was = required to design and build a working seismometer.  Our final design consisted = of a folded=20 pendulum which used magnetic induction, an amplifying filter circuit, = an A/D=20 converter, and Alan Jones=92 AmaSeis software.  I am continuing on with my = folded=20 pendulum design this semester and I am trying to make some = improvements on it=20 but I have some questions that I am having trouble finding the answer = for so=20 if anyone could help me find some answers I would really appreciate = it.  =

 

Where could I find a = thin flexible=20 metal sheet that I could use for the inverted pendulum=20 joints?

Where could I find what = I believe=20 is called a PZ electro crystal (the crystal that expands when it = receives a=20 current) for testing our unit?

Where could I find = information=20 about optimizing the magnet / coil / damper=20 system?

How would I go about = integrating=20 an A/D converter into my circuit that would have an output of =93  98<cr><lf>156<cr><lf>158=20 =93 for the values 98, 156, 158?

How many samples = per=20 second does the 8 bit have compared to the 10 bit and the 12 bit, and = what=20 exactly does bit mean?

 

If you have any = questions=20 about my design, advice, or helpful information you can contact me at = bromberg@.........=20

Thank you for = your=20 time.

 

Brady=20 Romberg

 


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