CCS C Software and Maintenance Offers
FAQFAQ   FAQForum Help   FAQOfficial CCS Support   SearchSearch  RegisterRegister 

ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to support@ccsinfo.com

electronic adapter

 
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion
View previous topic :: View next topic  
Author Message
procos



Joined: 15 Dec 2004
Posts: 12

View user's profile Send private message

electronic adapter
PostPosted: Tue Dec 21, 2004 2:54 am     Reply with quote

input signal : sinus form or rightangled form
grade : min.2mVref; max 6Vref
frequance : f= K*Q ------ 0-10Hz, 0-1100Hz
K- CALIBRATION FACIENT OF FLOW TRADUCTOR
Q - FLOW
ouput signal : 4-20 mAcc ; 0-10Vcc
undertaking resistence : 0-800 ohm for 4-20mA ; >2000ohm for 0-10V
alimentation : wathever( 220 V , 110V, 24 V, 5V)
any idee is very good.
thanx all.

thanx for any answare.
bye Exclamation
Rolling Eyes
procos



Joined: 15 Dec 2004
Posts: 12

View user's profile Send private message

?
PostPosted: Tue Dec 21, 2004 3:00 am     Reply with quote

is feasible with PIC16F873 ( TIMER 1 - 16 BITI)
Exclamation Question Rolling Eyes
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

View user's profile Send private message

PostPosted: Tue Dec 21, 2004 5:40 am     Reply with quote

What is your question????
You give a lot of specifications, but it doesn't make any sense to me. what do you want to do?

Your input signal is both changing in the 0-1100Hz frequency range and the 2mV to 6V range at the same time???

Your output is a standard 20mA current loop, but what resolution do you want to achieve (how many bits)?

Please provide more information.
procos



Joined: 15 Dec 2004
Posts: 12

View user's profile Send private message

my
PostPosted: Tue Dec 21, 2004 7:07 am     Reply with quote

sorry
grade : 2mV actual value to 6V actual value

10,12, 16 biti


palet turbine intersect magnetic field create of permanent magnet and create one electropower in bobbin.
frequance of this tension = rotation speed of turbine x number of palet
rotation speed of turbine is proportional with flow range
SherpaDoug



Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA

View user's profile Send private message

PostPosted: Tue Dec 21, 2004 8:45 am     Reply with quote

For the input you need a comparator (LT1011 comes to mind) to take a signal as low as 2mV and make in into a logic signal to drive the PIC. Give it a little hysteresis so it won't oscillate or pick up noise. The datasheet of the LT1011 describes this.

You can use any PIC with PWM to generate a DC output. You will need some amplifiers to get 0 to 10V and to get the 4 to 20mA from the PWM voltage.

Any PIC can do the math. The 220VAC to 5V DC power supply is another whole can of worms! I would design the circuit for 5VDC, and use adapters to turn the other voltages into 5VDC.
_________________
The search for better is endless. Instead simply find very good and get the job done.
procos



Joined: 15 Dec 2004
Posts: 12

View user's profile Send private message

thanx very much
PostPosted: Wed Dec 22, 2004 1:08 am     Reply with quote

thank you SherpaDoug and ckielstra Razz
i can show some schematic .
The pic with PWM who can use is: 18f242-i/sp.
is a flash and i can programate more times.
and stiil a littel:
with this signal i want define 3 parameters
1) time of fuction
2) total flow
3) instantaneous flow
i can ?
i need and date end time real (dalas ds1287 or motorolla mccs146818)
can i help my with one schematic?
i am newbie.
thanx very very very much
best regardes
constantin
Guest








hi
PostPosted: Wed Dec 22, 2004 4:39 am     Reply with quote

this is you want to do?
http://www.hofferflow.com/products/products.htm
Model 314I Digital Flow Totalizer/Rate Indicator

Very Happy Laughing Wink
procos



Joined: 15 Dec 2004
Posts: 12

View user's profile Send private message

yes
PostPosted: Wed Dec 22, 2004 4:49 am     Reply with quote

yes.true
Very Happy Very Happy Very Happy Very Happy Very Happy
Surprised Surprised Surprised

3 butons
yes
SherpaDoug



Joined: 07 Sep 2003
Posts: 1640
Location: Cape Cod Mass USA

View user's profile Send private message

PostPosted: Wed Dec 22, 2004 8:30 am     Reply with quote

Read through the datasheets for the chips you intend to use. Then if you post a .pdf or .jpg of your schematic we can comment on it. Note support may be rather sketchy for the next 2 weeks with the holidays.
I also recommend you get a flowmeter on your desk you can spin with your finger or breath and if possible an oscilloscope so you can see how the signals look.
_________________
The search for better is endless. Instead simply find very good and get the job done.
Display posts from previous:   
Post new topic   Reply to topic    CCS Forum Index -> General CCS C Discussion All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group