Inventor(s): Curtis Downs (North Richland Hills, TX) Assignee(s): UNASSIGNED Law Firm: No Counsel Application No., Date, Speed: 15264770 on 09/14/2016 (846 days app to issue)
I’m guessing deep water, to keep things light it’s common to design the electronics to cope with the water pressure then put it in a lightweight oil-filled container, rather than a pressure housing to keep the electronics at 1 atmosphere, which gets big and heavy at depth. It works well, but you have to be careful with component selection to avoid packages with air bubbles or other reasons why components might fail at pressure.
[B61K] OTHER AUXILIARY EQUIPMENT FOR RAILWAYS (energy-storing brakes B61H; protection of permanent way against weather influences E01B; rail cleaning, snow ploughs E01H)
Subsidiary Brookfield Renewables has grown its portfolio in Ontario from approximately 470MW of hydro in 2000 to 1,450MW of hydro wind and solar today. From projects on four continents, it matches OPG in terms of output capacity.
Nanticoke Solar has a capacity for 44 megawatts of power. It's a pittance compared with the 4,000MW of electricity the coal-plant produced before it ceased in 2014, but it joins a group of other green energy suppliers that have moved into Haldimand and Niagara.
I had an old boy scout manual that showed how to make your own capacitors (foil, wax paper and tape).
“Very little of the peak power making it to the output of the Tesla coil can be radiated as RF energy,” said Ward. “The operating wavelength of the coil is very long, yet the coil is relatively short at just several feet high — perhaps two meters. At 40 kHz, a quarter wavelength is about 1,875 meters. The VSWR is very high.
Since the wound wire is basically a coil, they have sufficient inductance and capacitance to have poor properties at high frequencies. To reduce or eliminate this, other ways of winding it are done such as bifilar winding, winding on a flat former and Ayrton-Perry winding as shown in the illustration.
As can be seen below there is a definite difference in the baseline impedance based upon the direction of the PCB trace. See the video for all of the fun in setting up for these pictures.
Ignoring for the moment the PCB layout, the most obvious difference is the case itself. The Cube case is thick and substantial, with a very nice rubberized coating that reminds me of the lid of a Thinkpad. In comparison, the itek tracker feels like it’s made out of material that’s only a step or two above those plastic Easter eggs. The PCB snaps securely into the case of the Cube, whereas on the itek it’s simply sitting lose inside the case with nothing to hold it down other than the lid itself. There’s also a very nice seal on the Cube to keep dust and moisture out, while the only thing “protecting” the itek is the fact that it comes with a backup for when the first one breaks.
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Abstract: A system and method for relay-mode and direct-mode operations for Push-to-talk-over-Cellular (PoC) using WiFi technologies. One or more servers interface to a wireless communications network to perform advanced voice services for mobile units therein, wherein the advanced voice services include an instant two-way half-duplex voice call within a group of the mobile units comprising a PoC call session. Both the servers and the mobile units that use the advanced group services communicate with each other using control messages within the wireless communications network. At least one of the servers switches voice messages for the advanced group services between the mobile units across the wireless communications network. At least one of the servers manages the call session by acting as an arbitrator for the call session and by controlling the sending of the control messages and the voice messages to and from the mobile units. At least one of the mobile units performs Relay-Mode or Direct-Mode operations using WiFi communications for delivery of the control messages and the voice messages to and from others of the mobile units, thereby enabling the advanced voice services when access to the wireless communications network by the others of the mobile units is limited.
A Brief Introduction to the Common Mode Choke and Its Applications | Inductor Color Codes Related Video:
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