I tend to forget that a lot of newer computers are doing away with all the different ports and going with USB. You would need a USB to Serial adaptor. A search on Google shows it can be found even at Wal-Mart.
http://www.google.com/products/catalog? ... IUBEPMCMAI
Older laptops and computers have this port and all you will need is just a standard serial cable.
If you plan to keep only one configuration. I can preset the parameters for you and you won't need to bother with a serial cable or interface board. Then it would just be plug and play. All I would need is what voltage cutoff you want, the pack size and chemistry so I can double check your choice and how long before you want the auto off feature to shut down the bike. I recommend 60 mins.
The scale factor is used to calibrate the A/D more precisely. But it is mainly needed due to the voltage range. Here is a simple spreadsheet to tweak RH and RL values for those who have a better understanding of analog to digital conversion.
But it is easier to just stick with the two ranges I’ve given.
If your pack is between 12 - 55 volts your scale factor will be .0537
If your pack is between 56-105 volts your scale factor will be .1027
Actually I’m glad you brought up the scale factor. I’m revising the parts list to make it easier, and just have 2 default ranges. For those who know how to use the spreadsheet and have accurate meters. They can modify RH and RL values.
I will try to get better documentation as I get more questions. This is usually the part that I tend to get lax on till someone brings up a detail that I’ve left out.
docnjoj wrote:Hey Kin I need to ask a few dumb questions. Is there a cable needed to plug that DB9 into my laptop? Also the screen capture is really to small to read for me . Is there any way a list of steps could be made to set up the switch? Finally which port do I plug the interface into on my laptop? Thanks for being understanding regarding my ignorance.
Edit: What is the "scale factor" used for?