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Author Topic: Solar SLA charging and maintenance for unattended transmitters  (Read 10049 times)

Offline JimIO

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Re: Solar SLA charging and maintenance for unattended transmitters
« Reply #30 on: March 13, 2020, 2243 UTC »
Redhat, you may find this interesting:

   https://github.com/botletics/SIM7500-LTE-Shield

~
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Offline Teotwaki

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Re: Solar SLA charging and maintenance for unattended transmitters
« Reply #31 on: March 13, 2020, 2330 UTC »
That shield could be useful for a lot of projects
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Jim
NRD-525, Elecraft KX3 and Elecraft PX3 Spectrum Display
76' end fed long wire & 66' off-center fed dipole for 10/20/40 meters
Orange County, SoCal, The better half

Offline syfr

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Re: Solar SLA charging and maintenance for unattended transmitters
« Reply #32 on: May 28, 2020, 1205 UTC »
Been playing with the PiZero with WiFi a bit. .  Lotsa capability for 9.99$ and a 1.5 watt consumption.

A 30 min transmission followed by deep sleep for a week, with occasional wakeups to check battery voltage should be workable.
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Kiwsdr x 2. TenTec Paragon/NRD535
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