Sv: EV2009 og EVS24

[BauDemo]

Hmmm... a lot of posts about charging.
Keep in mind that if the charging of the palm works when you plug the palm cable to the usb port of your computer, then your palm cable is fine. 
Another way to test your palm cable is to plug the usb in to a usb car charger - like the one from clasohlson or biltema (http://www.biltema.no/products/product.asp?iItemId=138998). 

Hans - 20mA is way too low, I am not sure it is really charging anything. I need to double check but the car charger I sent is 500mA or 1A rated, I have not measured the current requirement of the palm. Are the 20mA measured on the 12V side of your converter or on the 5V side?

[hkaspenberg]

Hmmm... a lot of posts about charging.
Keep in mind that if the charging of the palm works when you plug the palm cable to the usb port of your computer, then your palm cable is fine. 
Another way to test your palm cable is to plug the usb in to a usb car charger - like the one from clasohlson or biltema (http://www.biltema.no/products/product.asp?iItemId=138998). 

I'll check this afternoon unless my wife have other plans for me. 

Hans - 20mA is way too low, I am not sure it is really charging anything. I need to double check but the car charger I sent is 500mA or 1A rated, I have not measured the current requirement of the palm. Are the 20mA measured on the 12V side of your converter or on the 5V side?

On the 12V side, but it doesn't really matter since the 7805 is a serial regulator. A bit more complex than a zener + NPN transitor and a feedback resistor, but still a serial regulator that just introduces a voltage loss - the current will be the same on either side. 

-- Hans

[hkaspenberg]

Sjekket dette i kveld. Både USB laderen fra Biltema og min hjemmesnekrede har 5.02V (ubelastet) på rød leder samt sort leder koplet sammen med skjerm til jord. Signallederne (hvit og grønn) er ikke tilkoplet noe.

Palm'en lader når den er koplet til USB laderen men ikke når den er koplet til min... ? 

Jeg får skaffe en USB forlenger i morgen og lage en break-out-kabel slik at jeg kan måle strømforbruk på 5V-siden og evt. om min hjemmelagede dropper i spenning ved belastning. Det er vel eneste plausible forklaring.

;-D Hans

[hkaspenberg]

On on http://www.allpinouts.org/index.php/USB_-_Universal_Serial_Bus  I found the following "To force charging of your iPod, PSP or any USB device, you have to force high the levels of the data pins 2 (D-) and 3 (D+) by connecting them to a +5V using a 10KOhm resistor. "

This was worth trying, but didn't work... Some experimentation gave me the solution. Shorting D+ and D- directly to +5V (without using a resistor) makes the Palm to start charging. Actually it seems like all it needs is a short pulse, but adding additional logic was not a tempting solution and when just shorting the wires works equally well... On the 12V side of the regulator the Palm draws about 200mA while charging and about 35mA when the battery is full.

;-D Hans

[BauDemo]

Great work Hans!
I finally found the time to dig out one of the palms ac adapters - it was rated 1A at 5V. It is probably over dimensioned.
Did you measure any difference with the backlight on and off?

[hkaspenberg]

I have experienced sporadic SW-errors lately: "Attempting to read past end of stream..." Could you put a try/catch around this or fix it some other way?

;-D Hans

[BauDemo]

Thanks for the feedback!
I thought that I fixed this.
What is the version of the program you run? You can see the version when you start the application - on the splash screen.

[elektrolux]

What is the current status on Water service capability on the Nicometer?

[hkaspenberg]

Thanks for the feedback!
I thought that I fixed this.
What is the version of the program you run? You can see the version when you start the application - on the splash screen.

Yep, you had. I thought I had upgraded to .464, but I was running .462. The .464 seems to be stable  

[Lynet]

Er det noen som kan si hvor lenge batteriet varer uten lading med EV-monitor i gang?

[hkaspenberg]

Jeg tror det er litt variabelt avh. av tilstandenen til batteriet i Palm'en- Hvis min m505 er 100% oppladet så står den på rundt 21% etter 7 timer uten strømtilførsel. Det holder bra for å logge en full opplading av Th!nken.

;-D Hans

[Ken]

Kanskje lurt å kjøpe en USB sigarett plugg lader. Man trenger da en serie kabel forlenger. Litt mye kabler, men det er ikke ofte at man logge oppladinger osv. Tror ikke at min Palm værer i 7 timer. Ikke nok til en full opplading i alle fall.

[Lynet]

Er det noen andre som har hentet ut logg på en ladeprosess fra laderen? Jeg ser at temperaturen T2 er høy, ca 50 grader. Men hva er normalt?

[Ken]

Ladeviftene kjører når elektronikken er over 40 grader. 50 er høy og du bør sjekke at viften kjøres i et hele tatt. Hvis du kommer bak laderen kan du føle dem og sjekk at de sviver fritt

[El rayo]

Er det noen andre som har hentet ut logg på en ladeprosess fra laderen? Jeg ser at temperaturen T2 er høy, ca 50 grader. Men hva er normalt?

Jeg fant ut følgende ved å observere laderen ved hjelp av FR-2000 lenge før EV Monitoren var en realitet:

Viftene i laderen starter når én av de tre tempertursensorene er over 45 grader C.
Viftene stopper igjen når alle temperatursensorene er under 40 grader C.