This little device shows you the CPU-load, how much physical and virtual memory is used. It shows this data per 10% on 3 ledbars. To do so it uses a VCP (Virtual COM Port), so that it can be connected to a PC via a USB connection to receive the data. Collecting the data and sending it to the device is done by a Python script.
USB CPU and Memory monitor - [Link]
Milen @ instructables.com writes:
The purpose of the project was to create an external USB audio card, which could be able to:
1) serve as usual external USB audio card with headphone/line output and audio line input
2) can transmit the digital audio data at relatively long distance (20m -100m)
3) can receive and process the digital audio data send by the similar card and either transfer it through the USB to the PC, or convert it to analog audio signal
As long distance transfer media was chosen the POF.
A short explanation of the POF technology will be presented:
External USB audio card with optical S/PDIF POF interface - [Link]
Here’s a handy USB Breakout Board that makes measuring USB 2.0 current draw, data, or whatever, a snap.
USB Breakout Board - [Link]
Mats continues his challenge of designing one PCB every week. In week 17 he came up with USB Spypow, it displays the actual charge rates of a USB device:
Yesterday I saw the “The Practical Meter” on Kickstarter – a small unit that is placed inline with the USB when charging your phone and shows the actual charging power (in watts) on a row of LEDs. I wanted to have a go at it as well so I did the following last evening.
USB Spypow - [Link]
Steve Taranovich writes:
This is a first in a series of stories called “EEvolution of an idea” showing how a good idea got its start and evolved into a viable product in the electronics industry. I would ask our faithful EDN readers to comment on this series idea and if there is a good positive response which views this as something useful and educational to our readers, then I would like to continue with more interesting and innovative stories like this.
I was recently alerted to an innovative new product called the PortPilot in a comment to an article on EDN.
PortPilot Pro is an inline USB power analyzer, designed by J. Loren Passmore. Passmore describes himself as “an entrepreneur who consults with companies in a variety of industries to envision innovative products and speed their path to market.
Innovative inline USB power analyzer - [Link]
Florin @ youritronics.com writes:
This is a little project I made recently, I call it USB A to micro USB bridge and it does what the name says: it’s just a bridge between the USB A female connector and the female micro USB. In the middle there is a DIL pin header that allows you to connect or disconnected individually the USB signals. I needed this because recently I started working on a USB project and I wanted to have an easy way to hook up a multimeter for measuring things like voltages or current passing through.
USB A to micro USB bridge - [Link]
FTDI chip provides really excellent USB chips, that will handle all the USB communication for you with really excellent bandwidth performance. FTDI provide an exhaustive documentation for their cross platform driver. In contrast with the VCP (Virtual Com Port) mode, the D2XX driver allows direct access to the USB device ports in a completely transparent fashion. The Windows drivers are already certified by Windows, so you can just pick your favorite chip from FTDI, and use it in your product without having to worry about time consuming driver development and certification.
All those arguments make FTDI a very good choice if you are willing to launch a cross platform USB based product as we did for ScanaPLUS. However, be warned, there is One Big Problem you will face on Linux platforms. This short post is all about this problem, and the solution we found to overcome it in a nice, transparent and beautiful way.
FTDI, D2XX and Linux: Overcoming the big problem! - [Link]
Babuino is a device as small as a flash drive, and is designed to control any electronic device through your smartphone. We have developed a software package that allows the user to take advantage of babuino without having any background knowledge of programming or electronics.
Babuino intends to interconnect the devices we use in our everyday lives.
Babuino can be connected to a USB port to allow your smartphone to behave as a keyboard or a mouse to control your computer. It’s ideal for wireless presentations, surfing the internet or watching movies from your couch, etc.
Connected to the USB OTG port of your mobile, it allows you to control your phone from your PC which makes it possible to chat on the smartphone as you work without having to touch it, with the convenience of a regular keyboard and mouse.
There is no need to configure anything or install any additional software.
Babuino is an Open Source and Open Hardware project and the device is an arduino compatible board with integrated bluetooth, meaning that enthusiasts can use it as the basis for their own projects involving the control of electronic devices from their smartphones.
The use of Babuino is not restricted to being a keyboard or a mouse, babuino can be used as a webcam, a sound card or any other USB device that receives the data from a smartphone.
Babuino: Connecting smartphones to digital devices - [Link]
High-quality enclosures from company New Age Enclosures can be assembled by one click.
If we´ll carefully design a device in a way to be as small as possible, it´s natural, that we don´t want to make it bigger by a uselessly bulky enclosure. For this purpose we keep in offer enclosures for small USB or other miniature devices. Despite their small dimensions, they´re constructed with a goal to maximize inner space.
For example type P3A-220705U can be assembled by means of 4 lugs – by a simple pressing of both parts to each other. This solution has an advantage in an absence of visible screws, nuts or similar and at the same time it speeds up assembly of devices at production. It is worth mentioning, that the enclosure holds relatively very firmly and it´s better to close it after we´re sure we really want to close it. Enclosure P3A-220705 is available without or with an opening for a USB-A connector. To this model it is possible to buy a reset button suitable for wireless devices and similar.
Detailed information will provide you the P-220705 datasheet with a 3D view and on the New Age Enclosures website also CAM models are available.
In case of interest, please contact us at email@example.com.
Small USB device? – No problem – [Link]
Cheap low-speed dual channel PC/USB oscilloscope with STM32F3 microcontroller.
Miniscope v2d is based on STM32F303CBT6 microcontroller – LQFP48 device from STM32F3 family featuring:
- 32 kB RAM on data bus
- 8 kB RAM on instruction bus
- 128 kB FLASH memory
- USB device (full speed)
- 4 fast and flexible ADCs
- 12-bit DAC with two output channels
- 4 opamps that can work in PGA mode
- ROM bootloader with USB DFU option available
STM32F303-based low-speed PC/USB oscilloscope project – miniscope v2d - [Link]