I've been working on an ARM based quadcopter over the past several weeks. It utilizes a custom sensor pcb that is essentially a break-out board of break-out boards from Sparkfun. The custom pcb also serves as power distribution to the motors. The…
No Worries. I'm sorry if my response sounded defensive. My original plans for this project have not been going well this year so far. I sincerely hope that opening up the design will turn out to be a good thing for everybody that is…"
that "jump" from $330 to $794 is how I plan to make a living. I have been though numerous iterations of design and EMC testing (close to $10k for testing). With the open design, you can manufacture this design yourself. Maybe you can get…"
The BOMS are located under openfhss/vikingXE_hardware/bom
I see now that I included cost columns for PCBA BOM, but I didn't include cost for the final assembly BOM. For reference, my cost to build 24 units minus adc calibration and testing…"
230kbps is very close to the maximum data rate possible for an FSK, 50-channel, high power frequency hopper due to the 500khz channel bandwidth requirement in the FCC regulations. To achieve higher data rates, you will have to resort to 26MHz…"
It should be possible to modify the design to work at 868MHz. First, you would need to change the Fujitsu 902-928MHz band pass filter to a filter centered around 868MHz. Firmware would also need to be changed to operate the transceiver in…"
I have already been through the prototype phase and proceeded to have 24 machine built units produced. Due to the small quantity, high quality of the manufacturing process, high-end connectors, these units were relatively expensive to…"
I recently started an open-hardware project based on my RF work for the past several years. Although I was targeting challenging real-time data collection in a tree-fruit orchard envrionment, UAV telemetry seems like a very good match for the…