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"Tearig,
We are building a test transceiver around the SX1272 as a possible replacement for the AT86RF212 (not compatible, of course) with matching for the US ISM 900mhz band only. I'll let you know what our field test results are (our application…"
We are building a test transceiver around the SX1272 as a possible replacement for the AT86RF212 (not compatible, of course) with matching for the US ISM 900mhz band only. I'll let you know what our field test results are (our application…"
"The LoRa system does provide really good receiver sensitivity if you use a high spreading factor. The catch is that increasing the spreading factor also increases the data latency to a point where it may not be acceptable for real-time flight…"
"Only if it is an RC aircraft, licensed pilots in civil, commercial or military aircraft do not require permission, and UAVs with FAA wavers also do not require permission (they are not operating under the RC rules)."
"In that case, as long as the modulation and data schemes are published, some provision for station ID has been made (ideally CW or FM/FSK ID every 10 minutes or so (minor firmware change, or possible serial command sequence to the RFD900), it can be…"
"Also having gone through the FCC certification process for a high powered 900mhz zigbee based radio system, I can pretty much assure you that if they are running at 1 watt and have not had the unit tested by a certification lab it is almost surely…"
"I see that you are in the US, so ignore everything about customs. Here is the deal on FCC approval.
If someone complains about you operating a non-certified transmitter, you will receive a letter from the FCC which typically just asks you to…"
If someone complains about you operating a non-certified transmitter, you will receive a letter from the FCC which typically just asks you to…"
"Sorry, I got the impression he was heading here from another country. On the second paragraph, there are probably better authorities here but that is my understanding of the rules for RC aircraft operation (and the rules our group operates under).…"
"Compliant means almost nothing. It is says that the engineer thinks that it will meet the FCC rules. Certified = legal in this context, compliant = illegal for import, commercial operation or non-research use.
While the rules are a little unclear…"
While the rules are a little unclear…"
"Looking at the website and documentation, the RFD900 is not FCC certified, just designed to comply. Arriving at customs with a drone they are likely to take a detailed look at what you have and it is unlikely you will be allowed to import a…"
"Sec. 97.215 Telecommand of model craft
An amateur station transmitting signals to control a model craft may be operated as follows:
(a) The station identification procedure is not required for transmissions directed only to the model craft, provided…"
An amateur station transmitting signals to control a model craft may be operated as follows:
(a) The station identification procedure is not required for transmissions directed only to the model craft, provided…"
"If you drop me a note with your address, I will send a board when I receive them. Let me know if you want it assembled, I will already be assembling 2 or 3 and I have a reflow oven so it is no trouble. No charge, I can assembly from parts we have…"
"Sorry, the filename is correct but I copied the link from the previous post.
Version 2 UAVPWR file
I don't know what the APM 2.5 power system looks like, we use a custom autopilot."
Version 2 UAVPWR file
I don't know what the APM 2.5 power system looks like, we use a custom autopilot."
"Design complete and files uploaded to http://71.6.151.114/pub/UAVPWR2.zip
Includes LDO for 5V regulated output, LC filter in input to LDO, mounting holes and BOM file with exact recommended part numbers.
Notes:
I don't think it will do much good to…"
Includes LDO for 5V regulated output, LC filter in input to LDO, mounting holes and BOM file with exact recommended part numbers.
Notes:
I don't think it will do much good to…"
"Jeff, sorry, I forgot about that. I will post another board in the morning with an additional regulated 5v output using the OKI switching regulator and an additional LC filter on the output to limit noise into the digital/sensor section.
Dean"
Dean"
"Design complete and files uploaded to http://71.6.151.114/pub/UAVPWR.zip
Contains PCB Artist (free download) CAD files and PDFs of schematic and board layers.
Dean"
Contains PCB Artist (free download) CAD files and PDFs of schematic and board layers.
Dean"
"It would not be wise to use diode drop to generate a regulated 5V anyway, as the drop depends on the current flow across the diode and can be much smaller than the rated 500 or 700mv value at low currents.
It would seem to be a good idea to put a 5V…"
It would seem to be a good idea to put a 5V…"
