The switching power supplies that regulate output voltage produce radiated emissions. Our tests compare waveforms that give clues as to how the chargers operate.
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When battery life rules, turn off 5G
The data is clear. My phone’s battery charge life looks better with 5G turned off.
How does skin color impact biosensors?
To determine blood oxygen (arterial blood oxygen saturation (SpO2)) and pulse rate, many biosensors use the reflectance of red and infrared (and sometimes green) light. Based on photoplethysmography (PPG), an optical technique that measures blood volume variations, dual-wavelength PPG pulse oximeters noninvasively measure/calculate the arterial oxygen saturation (SpO2). An oximeter transmits radiation at a known […]
Don’t push on that icon and other 3G sunset issues
Have you ever had to transition someone from a flip phone to a smartphone? Things you instinctively know how to do become obstacles. Fortunately, you can talk to a smartphone rather than just talking through it. With 3G heading into sunset, some cellphone users will need to upgrade to LTE or 5G before their phones…
I bought a 5G phone, now what?
The time had come to purchase a new phone. The only decision was to buy an iPhone 11 or iPhone 12 and which model. Here’s the tale of the purchase and setup.
What kind of growth is expected in 3D sensing?
According to the report, “3D Sensor Market by Type” the global 3D sensor market is expected to grow from USD 2.9 billion in 2020 to USD 10.0 billion by 2025, at a compound annual growth rate (CAGR) of 27.9%. The market researchers acknowledge that one of the main driving factors of 3D sensor market is […]
Video Teardown: Inside the Apple watch sport model
Though most of the Apple watch electronics are inaccessible because they sit within a 26 by 28-mm motherboard that’s overmolded with a special packaging compound, we were still able to discern a number of interesting features on the watch, including its use of a taptic engine and a special display light sensor.
