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March 27, 2012
about 11 months ago
Can we listen to GSM and Nasa broadcasts signals using this? I saw another device, much bigger though by another company, cost 2500USD and claimed it could tune in to those bands. But also you could write software to make your own GSM network, that anybody on any sim can connect. I wanted to do that at home for VoiP calls from my modile but 2.5k was allot.
I mean I wouldn’t switch 2.5kW with those but I can just barely see the traces on the top and they look thick. If its rated at 100w then the traces and can handle 100watt. This mean 0.5A at 220volt - So its not purely for 20volts only. If you removed the relay and connected a better coper wire to the terminals I am sure the terminals will be able to withstand 200~400watts. It depends what you want to switch on and off I suppose, but saying it only supports 20volts is to keep noobs out of danger switching on 1kw machines like a a stove or a massive computer. Doesnt seem like this PCB was thought through properly or its destination use is not mentioned.I would have put another trace on the bottom, to double the capacity. I would have expected some ADC inputs too.
The relay actually display 10A 250Volt . Is it a typo on the description. I dont see why it can only do 20V @ 5A max? Thats a 100Watt. From what the picture shows it can handle 2.5kW… ? Am I missing something?
about a year ago
I feel your pain. I found this security sim card which, if you use allot of data might be not the great thing. But for IoT this might be good. http://www.quicksafe.co.uk/security-sim-cards-c32/text-call-security-sim-card-unique-email-feature-p41 - Also I found this, SIM900A GPRS board, that also can be used as a positioning system with 100-10metre accuracy based on triangualtion :) Otherwords, free GPS. Text messages and simple UART /SPI interface, I found one for 20GBP from Persia or something. Make sure the base band is 900/1800 cause some cheap ones only work in China, doh!
Its standard sized so I think it will only support 3G, maybe HSDPA+ if its in your area. I thouhgt LTE is only supported on Nano SIM’s
Haha, Do let us know how much data you leeched before they throttle you. :) If it works at all :)
Sorry, in EU. The thing is it costs 6 pounds a year to keep alive. So if I put 50 pounds on it I can place a temeparature monitor in Poland, and as long as it had power I would be able to communicate with it with simple messages for about 3 years. I think the application is very important. I get it, this product would be great for AcessPoint tethering if you travel allot, or even if its cheaper than you can get with any GSM provider in your country as Internet at home!
Yea I see your point. For me, I was thinking of using it like on an arduino with a uart gprs modem to send me some simple information from time to time. Like 1MB maximum per month. That would be a big waste using this SIM card. But… I understand that this can be a massive saving for people in other countries or for application that stream allot of data. So.. sorry for over reacting
That would be pretty awesome for access point if you travel allot. Data charges outside EU are horrific.
Who knows? They didnt provide terms and conditions. Unlimited could mean 1GB LTE then the rest is served at EDGE speeds and if you really over do it then take GPRS.
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