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Lx90 Electric specicifation


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#1 sirius35

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Posted 01 May 2007 - 06:52 PM

Hello,  ;)

I'm looking about electric specification from Lx90.

I would like to change alcaline battery by Nimh, Nicd or other battery, but I don't know Watt-hours parameters.

If you have this information (or same for Lx200) thanks,

Best Regard,

Jean-Paul

#2 Steve S

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Posted 02 May 2007 - 05:53 PM

I remember a link off of mapug - it was Jans*****-something . there was a section that had the electrical schematics.  Good Luck .
Steve S
Equipment :
12 " Meade LX90 GPS
13.1" Coulter Dobsonian--4sale, 
80mm W.O. - Megrez SD
18" NGT / JMI 
DSI  2 , LPI , Orion SSAG
Modified Canon 400D  XTI
Panasonic DMC FZ50

#3 Steve S

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Posted 02 May 2007 - 06:40 PM

Here's a site :

http://www.mapug-ast...r/Lx20elec.html

You will find it here !

Steve S
Equipment :
12 " Meade LX90 GPS
13.1" Coulter Dobsonian--4sale, 
80mm W.O. - Megrez SD
18" NGT / JMI 
DSI  2 , LPI , Orion SSAG
Modified Canon 400D  XTI
Panasonic DMC FZ50

#4 sirius35

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Posted 03 May 2007 - 01:20 PM

Hi Steve,

Thanks for your reply.

I haven't find my info... i'll try 1000mah Lithium-Polymer Battery (Lipo)(I already use it in my radio-control planes and also my radio).

Lipos advantages are :

No memory charge
More autonomy compare Nimh or NiCd battery
lighter than Nimh or NiCd battery (some gr less to transport)  ;D

#5 autostaretx

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Posted 07 June 2007 - 08:39 PM

The LX90 uses 8 C-cells.  So that means it wants at least 12 volts.
(do not give it more than 15v).(do not give it LESS than 10 v).

The LX90 draws about one amp (peaks to 1.5, probably idles at 0.5)

Usually external batteries for it are rated in ampere-hours instead of watt-hours,
but watts are just voltage times current, so you can convert by multiplying
the amp-hours by 12.  Thus a 7 AH battery is roughly 12*7= 84 watt-hours.
A 7 AH battery will provide up to 7 hours operation (at one amp draw).

The LX90's relatively low (1 Amp) current draw may not be optimal
usage compared to how your RC batteries are designed (they're for
short-duration, high current, right?), which may affect their service life.

The "Jan's" site previously referred to is:
http://jan.eaglecreekobservatory.org

have fun
--dick

#6 sirius35

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Posted 07 June 2007 - 09:53 PM

Hi Dick,

I already transform power supply for my Lx90, it support 1A battery 3s Lipo.

I'll test how long it's working (a night will be good).

This battery can provide up to 12 time battery charge, so I can have up to 12A burst power... So i'm really  trustful in his capacities  :'(




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