hardware
What’s the hardware spec for Google Colaboratory? [closed]
You can see the disk information using a command like !df -h. To see CPU specs, !cat /proc/cpuinfo. For memory, !cat /proc/meminfo. Here’s an example notebook: https://colab.research.google.com/notebook#fileId=1_x67fw9y5aBW72a8aGePFLlkPvKLpnBl Edit: Colab now offers a Pro version which offers double the amount of disk available in the free version.
What is the minimum latency of USB 3.0
Answering my own question… I’ve come to realise that this question kind-of misses the point of USB 3.0. Unlike 2.0, it is not a shared-bus system. Instead it uses a point-to-point link between the host and each device (I’m oversimplifying but the gist is true). With USB 2.0, the 125 us polling interval was critical … Read more
Tool for drawing timing diagrams
WaveDrom is a free and open source online digital timing diagram rendering engine that uses JavaScript, HTML5 and SVG to convert WaveJSON input text description into SVG vector graphics.
How to detect hardware keyboard presence?
[android-developers] Re: Detect Physical Keyboard Layout (ex: QWERTY vs QWERTZ) The flags provided by getResources().getConfiguration().keyboard are a good way of checking which keyboard (if any) is available.
Can I write or modify data on an RFID tag? [closed]
RFID Standards: 125 Khz (low-frequency) tags are write-once/read-many, and usually only contain a small (permanent) unique identification number. 13.56 Mhz (high-frequency) tags are usually read/write, they can typically store about 1 to 2 kilbytes of data in addition to their preset (permanent) unique ID number. 860-960 Mhz (ultra-high-frequency) tags are typically read/write and can have … Read more
How can I find out if a device has a vibrator?
The Vibrator class does just that. It’s hasVibrator() method returns a boolean indicating if vibrating is supported. Get an instance of the Vibrator class which is a system service. Query the Vibrator class using the hasVibrator() method. String vs = Context.VIBRATOR_SERVICE; Vibrator mVibrator = (Vibrator)getSystemService(vs); boolean isVibrator = mVibrator.hasVibrator();
VHDL – How should I create a clock in a testbench?
My favoured technique: signal clk : std_logic := ‘0’; — make sure you initialise! … clk <= not clk after half_period; I usually extend this with a finished signal to allow me to stop the clock: clk <= not clk after half_period when finished /= ‘1’ else ‘0’; If you use a std_logic item for … Read more
What’s the difference between “COM”, “USB”, “Serial Port”? [closed]
Serial port is a type of device that uses an UART chip, a Universal Asynchronous Receiver Transmitter. One of the two basic ways to interface a computer in the olden days, parallel ports were the other way. Serial is simple to hook up, it doesn’t need a lot of wires. Parallel was useful if you … Read more
What is actually a Queue family in Vulkan?
To understand queue families, you first have to understand queues. A queue is something you submit command buffers to, and command buffers submitted to a queue are executed in order[*1] relative to each other. Command buffers submitted to different queues are unordered relative to each other unless you explicitly synchronize them with VkSemaphore. You can … Read more