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"Phonebooth" kit

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Sun, 04/18/2021 - 18:14
#1
AJ6OH
"Phonebooth" kit

Basic "phonebooth" kit with the phone (GXP-1630) going to the Mikrotik SXTsq 5. Front right corner has two RJ45 panel mounts. 12V/5V step-down for the phone. 10Ah Dakota Lithium battery. Apache 2800 case.


 

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Fri, 04/23/2021 - 11:15
AB7PA
Looks great!
What a fun project, Martin.  Looks great!
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Tue, 04/27/2021 - 13:36
km6zpo
km6zpo's picture
HUGE battery!
You could run that phone and AP for weeks off that 10aH battery!  
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Tue, 04/27/2021 - 14:22
(Reply to #3)
K6CCC
K6CCC's picture
Weeks? Not hardly!
Not hardly!  That's 10AH x 12 volts which is only 120 watt hours.  The SXTsq 5 is speced at 7 watts max (likely does not take that much).  At half that, it would only last a little over a day, and that does not include the phone (which I could not quickly find a spec for), or conversion losses.
 
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Wed, 04/28/2021 - 21:55
(Reply to #4)
AJ6OH
runtime

I haven't tested yet how long it would run. Much will depend on the use profile, standby vs. in-use. 
The wallwart for the phone is 5V/0.6A. The stepdown converter claims over 95% max. conversion efficiency.

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Thu, 04/29/2021 - 14:38
(Reply to #5)
km6zpo
km6zpo's picture
7 watts? Wow!
You are correct Jim!  Can't believe that thing sucks down 7 watts but I checked... correct.  That's a power sucker!  

https://help.mikrotik.com/docs/display/UM/SXTsq-series

In that case, perhaps it would be a good idea to have a solar panel - something around 25 watts @ 12VDC to keep the battery topped off.  
 
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