telemetry for DC voltage(100volts) and Current(20amps) over 100 meters
We have a high school solar car in Newburgh NY and wish to bluetooth link V and I readings from our solar car to a bluetooth dongle in our chase vehicle laptop.· We are neophytes in this endeavor and need to know what components we need to·sample·V and I every minute and then graph them.· We understand that we can send via an embedded blue tooth transceiver.· We hope·we can utilize our·basic stamp 2 to send this info but need to know the easiest way to digitize our V and I, what sensors would be best and how to set up the bs2.· We also would appreciate· and info on sending via bluetooth and reading that info on a real time graph.
Thanks for any info
Lee Cabe
Sol Machine VI
Thanks for any info
Lee Cabe
Sol Machine VI
Comments
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- Stephen
http://www.allegromicro.com/sf/0754/index.asp#sample_request
Note that you will need to have an ADC to interface with this sensor since it outputs a linear voltage that corresponds to the current through the sensor.
For voltage, you should be able to use a resistor voltage divider (aka resistors in series) to reduce the voltage down to a 5v max signal voltage required for standard 5v ADCs. Note that you may want to put a 5.1v zener diode on the output of the divider to clamp the voltage at a max of 5.1v so you don't fry the ADC in the event of over voltage.
Harrison
Post Edited (Harrison.) : 1/13/2007 7:45:33 PM GMT
We will goto allegromicro.com and will use the 5.1v zener diode for protection. This is the info we are thirsting for. We are brand new to the BS2 are about to try some experiments to see how it works how we can communicatewith it.
Martin Hebel, the man behind SelmaWare, is active on these forums. He can answer any questions about the products, if you have any.
The software problem is one of our nightmares and selmaware.com looks like an answer to a prayer. We will check into their website.
Lee
Here's a link: www.parallax.com/html_pages/edu/curriculum/sic_curriculum.asp
- StampPlot & Wireless stuff...
-Martin
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Martin Hebel
StampPlot - Graphical Data Acquisition and Control
AppBee -·2.4GHz Wireless Adapters & transceivers·for the BASIC Stamp & Other controllers·