Tag Archives: wireless charging

PowerSpot Far Field Wireless Charger Will Charge Devices Up to 80 Feet Away

Over the last few years, there has been an unprecedented growth in the consumer electronics industry. The smartphones, fitness trackers, Smart homes devices, wearables, earbuds, VR/AR, and much more have fostered this growth.

The Smartphone proliferation has been a key factor in the global consumer electronics market size, smartphones have become way better, faster and even cheaper. The Internet of Things (IoT) has promised us more incoming and it’s estimated that we will have up to 21 billion connected devices by 2020. Technological advancements like the emergence of 4G and 5G technologies are expected to drive this demand. Despite all these advances in technology, one function remains chained to the wall – Power.

The laptops, tablet, phones, smart hubs, fitness trackers and others still require being powered. Even, though they are mostly battery powered and could last for a couple of days (without much activity), they all still need to be tied to a plug socket for hours to be recharged. Power has been a major source of concern and people have been dreaming about the potential of wireless charging their devices.

Powercast PowerSpot Transmitter

Wireless charging has been an interesting topic in the past few years with major advancement made in wireless charging smartphones up to a few centimeters using charging platforms. Like Energeous Wattup that charges up to 3 feet away, Powercast has introduced PowerSpot – a system that will allow devices to be wirelessly charged at up to 80 feet away.

Powercast a leading provider of RF-based wireless power technologies, has unveiled the PowerSpot. Similar to Wi-Fi, devices charges in the range of the PowerSport 3W transmitter, and will automatically turn off when full. PowerSpot charging technology needs no charging platform or direct line of sight as we have seen in Qi charging platforms and has already received approval from both the U.S.-based FCC and Canada-based ISED.

Powercast’s transmitter uses the 915 MHz ISM band to send power to a Powercast receiver chip called “The PowerHarvester” in a device, which converts the transmission to DC to “directly power or recharge” an enabled device at up to 80 feet for devices with low power need. The PowerSpot transmitter uses Direct Sequence Spread Spectrum (DSSS) modulation for power and Amplitude Shift Keying (ASK) modulation for data and includes an integrated 6dBi directional antenna with a 70-degree beam pattern.

PowerSpot charging zone

Game controllers, smartwatches, fitness bands, or headphones will charge best up to two feet away; with keyboards and mice up to six feet away. TV remotes and smart cards charge well up to 10 feet away; with low-power devices like home automation sensors getting sufficient charging power up to 80 feet away.

Powercast is expecting a $100 retail on the transmitter with a projected $50 average price when it reaches mass production. It will be available in the 3rd quarter of 2018 or early 2019.

WattUp – RF based Wireless Charging at a Distance

WattUp Far Field Transmitter

Recently, many big companies such as Samsung have developed wireless chargers which work by induction. These chargers usually consist of a station which needs to be in contact with the device in order to charge. The station defeats the purpose of being able to move and walk while still charging the device. Energeous, a global leader in RF- based wireless charging, created the award-winning device WattUp in order to give mobile power to everyone.

The WattUp transmitter converts electricity into radio frequencies, then beams the energy to nearby devices that have the right receiving equipment. This system has proved to be more practical than induction since it can work from up to 3 feet away. Energeous wants to make a wire free charging ecosystem by taking into advantage the fact that the transmitter can charge multiple devices at a time, and as WIFI it would be able to charge your phone even if you are Samsung and the transmitter is Apple. All kind of devices can be charged using WattUp including (but not limited to) cameras, smartphones, tablets, wearables, and toys.

The receiver uses multiples antennas to collect the micro energy beams created by the transmitter (which makes it safe because power is received in small amounts). There is also an application available in which you can control the devices that are receiving power, how much power for each one, and even what times you want it charging. For example, you can prioritize cellphone charging in peak hours of use and leave other electronics to charge at night just with the click of a button.

The WattUp has already been FCC (federal communications commission) approved, and Energeous offers a variety of prices depending on the range of the transmitter, but it is still not available in the market. The company will be in CES 2018 showing their product, this event will take place on January 9th– 12th in Las Vegas.

Wireless charging not only benefits consumers, but also offers real benefits in terms of efficiency, productivity, and safety in industrial applications. Moreover, cables require maintenance and are easily damaged which makes them unreliable and expensive to maintain. In hospitals there is a constant need for big equipment that uses battery packs or cables, but to maintain a sterile environment WattUp could be a good alternative. Furthermore, in the future this technology could be used to power electric cars avoiding the need for charging every 10 to 40 miles.

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DIY IKEA Wireless Qi Charging

mcuoneclipse.com writes:

To my surprise, when I visited a nearby IKEA store yesterday, the older iPhone and Samsung Galaxy S4 (VITAHULT) Qi receivers were on sale for CHF 0.95 (about US$1): what could be wrong with buying a few of them? At this point, I should probably mention the ‘rolling eyes’ of my wife😉.

The question is: can I use these for my projects? So I decided to open up the wireless phone cover. The cover has to plastic parts, and with a bit tweaking I was able to separate them. Insider there is the battery connector, the receiver circuit and the charging coil under a black FFDM (Flux Field Directional Material):

DIY IKEA Wireless Qi Charging – [Link]