Search found 5 matches

by DeweyOxberger
Sun Oct 27, 2013 5:29 pm
Forum: Beta Testers
Topic: Temperature Limits
Replies: 3
Views: 7639

Re: Temperature Limits

How noisy is the temperature reading? Is this just a "threshold is too close" problem or a "spikes on the temp reading" problem?
by DeweyOxberger
Sat Oct 26, 2013 5:42 pm
Forum: Beta Testers
Topic: Suggestions/Observation/Bug Reporting
Replies: 24
Views: 31991

Odd behaviors I've noticed

Here are some of the behaviors I've noticed. This post isn't too helpful since I don't have a good way to reproduce any of this and I don't have much diagnostic information: With 512 and 514 I was seeing 1) I see batteries stop charging and the csv shows an overtemp error. The batteries are cool (lo...
by DeweyOxberger
Sat Oct 26, 2013 5:28 pm
Forum: Beta Testers
Topic: General discussion about LEDs
Replies: 1
Views: 6295

General discussion about LEDs

This is just some of my crazy thoughts about LEDs: 1) As I recall there are standards for colors and what they mean. Maybe there is something useful there. EN60204-1 says something like: Red = Emergency, Hazardous condition, needs immediate action, like temp is too high Yellow = Abnormal, something ...
by DeweyOxberger
Mon Oct 21, 2013 3:10 am
Forum: 4 Cell Charger
Topic: Optical Isolation on USB Port
Replies: 7
Views: 8330

Re: Optical Isolation on USB Port

I'll have to look but I was under the impression that most wall-wart switchers are elv or selv. If that is true have a good ground connection between the supply and the usb port and you shouldn't need any opto-isolation. Opto-isolation is surprisingly hard to do well (the hard case is fast transient...
by DeweyOxberger
Mon Oct 21, 2013 2:59 am
Forum: Ultimate Dream Charger/Analyzer
Topic: NFC Support -> Bar Code Scanner
Replies: 18
Views: 19513

Re: NFC Support

I also work with nfc. NFC on a battery is hard to do. The battery is conductive stuff. It acts like a shorted winding in an air-core transformer and sucks up all the energy. You have to waste a lot of power to make it work. If you want to pursue it get your brain wrapped around all the techniques us...