Monitoring voltage
digilink
Posts: 3
I'm new to basic stamps in general and I would like to design a circuit that will monitor voltage/current draw from a battery as my first project, but I honestly don't know where to begin.
I am thinking that I will need to use some sort of A/D converter, but not knowing how those work exactly has me wondering if there is another way to do it.
I would like to be able to measure and display voltages in the range of 0-15vdc and 0 to probably 40-50 amps of current draw, and then display the value on either an LCD display or send it to a PC application to be displayed.
Any ideas to get me started?
I am thinking that I will need to use some sort of A/D converter, but not knowing how those work exactly has me wondering if there is another way to do it.
I would like to be able to measure and display voltages in the range of 0-15vdc and 0 to probably 40-50 amps of current draw, and then display the value on either an LCD display or send it to a PC application to be displayed.
Any ideas to get me started?
Comments
I would like to be able to measure and display voltages in the range of 0-15vdc
Go to link and see if this is what you are looking for
http://forums.parallax.com/showthread.php?p=622885
0 to probably 40-50 amps of current draw
You would have to make a shunt with right voltage drop and this would work
with this setup
Look at this link for how to make your own shunt at the bottom of
the page http://forums.parallax.com/showthread.php?p=603765
I hope this will help you in what you want to do
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
··Thanks for any·
Sam
Post Edited (sam_sam_sam) : 1/9/2007 9:30:13 PM GMT
Here is a link to Tracy' site: http://www.emesystems.com/BS2rct.htm#B_voltage
Here is Beau Schwabe's... He·has a very simple, but effective solution that can be found at L.O.S.A (List of Stamp Applications) (http://www.hth.com/filelibrary/txtfiles/losa.txt):
External Components:
.01uF "ZTR" capacitor (Zero Temp Response)
100K Resistor
Directions:
1 - Connect the CAPACITOR and RESISTOR in parallel.
2 - Connect one side of the RC to Vin
3 - Select an available pin on the BS2 for the other
side of the RC.
Program:
Battery var byte
Start:
low {pin#}
rctime {pin#},0,Battery
Debug home,? Battery
goto Start
Typical Results:
85 - Fresh 9 Volt Battery
220 - Low 9 Volt Battery
Note:· The number INCREASES as Battery weakens...
Post Edited (Steve Joblin) : 1/12/2007 1:34:54 PM GMT