USB is Universal Serial Bus. If your question relates to a specific chip, please mention it in your question.
3
votes
1answer
97 views
Safely extract power from USB
I am upgrading the lighting in a model with simple circuit which has 17 LEDs (approximately) plus one or two 555 timers. Presently, everything is powered by 3 AAA batteries. It drains between 150 and ...
3
votes
2answers
87 views
What is the purpose of capacitors and resistors in this USB bus?
Trying to understand the purpose of the capacitors and resistors in this bus powered configuration for the FTDI chip, I think the capacitors are for filtering high frequency noise, not sure what the ...
1
vote
3answers
76 views
Custom USB Impedance question
I'm looking at making my own USB cable for a project. The primary issue I'm having is that I'm getting a lot of capacitance in my cable between D+ and D- (400ish pF) which is enough to throw off the ...
3
votes
1answer
166 views
+100
Working with FTDI library for accessing FPGA memory
I asked a related question here.
The board is Lattice MACHX02 1200 ZE.
I am using FTDI Library FTCSPI to access Lattice FPGA UFM through FTDI chip FT2232H. I configured the FPGA in SPI slave by using ...
3
votes
2answers
88 views
How to uniquely identify USB HID class device?
I would like to identify a USB keyboard uniquely(something equivalent to unique mac-id for the Ethernet cards) on a computer. Does the USB HID profile has a support for such identification ? If so ...
2
votes
1answer
76 views
What is the metal sheath surrounding a USB connector, and is it commonly connected?
I was tearing apart a mouse for repairs and noticed that the small plug for the USB connection had a fifth connection. This connection had a much thicker wire than the other four.
I assume it is ...
1
vote
4answers
148 views
How do I solder this USB Connector?
I bought this micro usb part: http://www.digikey.com/product-detail/en/10118192-0001LF/609-4613-1-ND/2785378
I need to solder it to a PCB that I designed, but I'm having a ton of trouble figuring out ...
1
vote
1answer
58 views
Home made USB charger based around LM2596: Smoothing caps
I'm embarking on building a home made mains USB charger based around an LM2596 DC:DC converter. I had a couple of Newbie questions.
Can I connect 5 or 6 USB plugs to the output of the LM2596 ...
2
votes
1answer
60 views
Searching for standalone unix development board to connect DC motors
I though a bit about the board and came to the conclusion that it may be more intelligent to use a stand-alone component which provides serial ports and an unix os which I then can control over the ...
-2
votes
0answers
56 views
ARM board for DIY GPS [closed]
I have been experimenting with a u-blox 7 module hooked up to my laptop via USB. Now I want to try using it to build a DIY GPS receiver. But I am not sure which ARM board to go with.
Basic specs I am ...
0
votes
0answers
13 views
Can USB 3.0 device initiate communication with USB 2.0 computer? [migrated]
I want to copy files from a computer with USB 2.0 support to an external drive with USB 3.0 support, but do not trust that the external drive is free of malware. Can a USB 3.0 device initiate ...
-2
votes
0answers
26 views
Is there any risk charging a camera battery with a bigger intensity AC adapter than expected? [duplicate]
I use a Samsung ST30 camera, which AC adapter outputs 4.4V - 400mA current delivered by USB port. As a matter of facts, it nicely loads on a computer USB port outputing a probable 5V - 500mA.
The ...
0
votes
1answer
87 views
Programming an NXP - LPC1313FBD48
I was planning on flashing my mini os onto my NXP - LPC1313FBD48 (here is a link to where I bought it) but I wasn't really sure how. So I asked but I was told that I would need a serial to usb ...
1
vote
1answer
43 views
Listening in on ANT+ device communication?
I have TACX iGenius cycling trainer, which uses an ANT+ USB stick to control the resistance on the bicycle wheel. (You play a video in their software, and it matches the resistance on the wheel to ...
2
votes
1answer
63 views
Where do I lookup values for building an USB HID descriptor?
I'm trying to educate myself a bit on creating a USB HID descriptor in C for a PIC32 USB project I want to attempt.
I've downloaded the HID Usage Tables document from ...
0
votes
3answers
113 views
Three-prong / USB power outlets in wooden desk [closed]
I am trying to mount a strip of three-prong outlets and a strip of USB charging outlets on an old wooden desk. I can handle the carpentry aspect, but I am struggling with the electrical aspect.
I ...
1
vote
1answer
47 views
USB interface to bluetooth interface for digital scale
I've got a situation where I need to communicate wirelessly between a bluetooth-enabled Android device and a digital scale which can be accessed digitally via USB.
While normally I would be happy to ...
1
vote
0answers
13 views
USB 2.0 device on USB 3.0 Power and Data Bandwidth [migrated]
Traveling questioneer from StackOverflow, asking about bandwidth using on USB 3.0. I'm hoping this is a decent place to ask as I didn't see a "computer hardware" stack in the list.
My question is ...
0
votes
2answers
57 views
USB Lamp, controlled by linux driver
I want to build a simple USB lamp (maybe colored LED lamp) which will be controlled by PC. So, actually, i want to get practice in linux kernel modules development, but i need to get appropriate ...
0
votes
0answers
50 views
Implementing USB On PIC24
We want to implement USB on our PIC24 based embedded system.
Hardware: All done
Firmware: USB part is currently Non-existent
My role: Make it all work
Questions: The protocols are very complex
...
-7
votes
0answers
49 views
how to find and insert usb address in a C program? [closed]
I am making a project in which i have to transfer data from a microcontroller to my laptop via a USB to UART converter(to convert to ttl logic), and display the data on the computer by a C program.
I ...
1
vote
2answers
93 views
How does a computer (or USB device) detect that there is a new/lost connection?
I have two computers, a USB keyboard and a USB mouse. I want to build something that lets me switch the USB devices between the two computers. My approach would be to buy a new powered USB hub and ...
0
votes
2answers
69 views
Arduino Clone is not talking to my Mac
When I plugin my Osepp Uno (off-brand of Arduino Uno), the LED flickers a bunch, then the RX and TX lights do the same. But when I
ls /dev/ | grep -i usb
I get ...
0
votes
1answer
57 views
How simulate trick htc wildfire charger (get max current)
I have an HTC wildfire phone and I'm looking for way to trick this HTC to think it's connected to the original charger. I don't have original so i can't open it to measure. Right now for charging I'm ...
-1
votes
2answers
103 views
Multiple 2A USB Mains powered chargers [closed]
I'd like to know why there are no mains-powered chargers that can charge multiple usb devices at, say, 2A and 1A?
I'm after something that can charge 2 tablets that ask for 2A and 2 phones on 1A, so ...
0
votes
1answer
17 views
Are there any DIP alternatives to the FT232R?
I'm currently using an Arduino on a breadboard, interfacing with it via a FT232R chip mounted on a breakout board. For my final design I'd ideally like to use all thru-hole components for ease of ...
2
votes
2answers
59 views
Connecting two STM32f4discovery boards
We have two STM32F4Discovery boards with Micro USB's for serial communication.
Is it possible to connect two boards to allow communication between them?
Is there is any different hardware other than ...
-3
votes
0answers
49 views
What USB Devices exist to control motors and connect sensors? [closed]
I am planning to use a Raspberry Pi for controlling an automated toy car. I would like to know what USB devices exist that have several slots for connecting motors and sensors. My plan is to connect ...
3
votes
2answers
90 views
“Wireless” USB cable, via RF / 3G
I'm looking into the feasibility of a project to develop a USB-over-RF device for physical penetration testing engagements. The idea is that our tester could connect a device to a USB port on a ...
1
vote
2answers
57 views
Can the Arduino Leonardo act as a keyboard, mouse, and serial port at the same time?
I am doing a project that requires me to control both a mouse/keyboard combination and a serial port to activate it. (I know, it can prevent me from using my computer, etc. but I have precautions ...
3
votes
0answers
45 views
Handling Transient Currents on USB Powered Devices
I'm working on a USB-powered speaker design and could use some thoughts or design inputs from the community.
The data part is pretty simple - USB powers an I2S bridge that talks to an I2S amplifer. ...
1
vote
1answer
8 views
Is it possible to use a non-Leonardo board to act as a keyboard or other device?
I have been seeing lots of reports about the brand new Leonardo and it's capabilities, cheapness, and most popular, it's USB features. However, I look down at the ol' Arduino Uno and sigh. I don't ...
-5
votes
2answers
81 views
What is the range of a 2dB usb wifi dongle? [closed]
For a home robotics project I need to connect my laptop to my robot's Raspberry Pi using wifi. For this to work I want to buy a simple usb wifi adapter to plug into my Raspi. I will need a range of ...
-1
votes
1answer
55 views
Controlling a normal florescent bulb using usb [duplicate]
As a project for my summer holidays am working on a system which will detect faces , depending on which it will either switch on or off the bulb connected to the system (USB preferred).
I have ...
5
votes
2answers
29 views
How do I use a USB OTG cable to read a USB thumbdrive on Arduino Uno?
Is is possible to use a USB OTG (On-The-Go) cable hooked to the Arduino Uno's (or similar) USB connector to read a thumb drive or other device? If it is possible, what software would be needed?
0
votes
1answer
68 views
Flashing an MCU with MicroUSB
I recently bought This MCU and in another question asked how I could flash it. The response was to use a USB to serial Connector (which I wanted to find on newark.com but could not). I wanted to know ...
-1
votes
1answer
117 views
How to (re)create an USB 3 header interface PCB? [closed]
I would like to start a "small" project. Create an USB 3 version of an existing USB 2 PCB.
On the PCB there is only 2 USB connectors, a capacitor and a USB header (to connect to the USB controller). ...
1
vote
2answers
121 views
What is the correct term for this type of USB Input devices?
Hi, I'm working on something where I need to use a huge amout of these little guys (picture attached), probably around 32 or more for a start.. The problem is, I need to be able to connect all of ...
0
votes
0answers
78 views
USB bare metal on ARM Cortex A9
We are envisioning developing a new project using a Cyclone V SoC with a hardcore ARM Cortex A9 dual core processor.
We are seriously considering going bare metal, but one of the main questions right ...
6
votes
4answers
189 views
Recommendation of a USB to RS232 chip for industrial environment
I have bought a device which has a ATMega microcontroller and a FTDI chip which connects to a computer through USB. The FTDI is used only as RS232 to USB adapter.
My problem is that this device ...
2
votes
2answers
124 views
Disadvantages of USB to RS232 dongles
I understand (or am learning, rather) how both RS232 and USB work. What I am really curious about, and can not seem to find much information for, is what kind of disadvantages do USB to RS232 dongles ...
3
votes
1answer
9 views
Can I use a serial module with a barebones Arduino?
I have recently bought a couple Bluetooth modules that connect to the Arduino via TTL/USB/UART (you use Serial(); to communicate with it).
I don't know if the ...
6
votes
1answer
15 views
What are the advantages of having USB part of the microcontroller (as the Leonardo does)?
The new(ish) Arduino Leonardo has an ATmega32u4 microcontroller which is different from the ...
0
votes
0answers
74 views
v-usb HID button press and release
I'm trying to use v-usb on an AVR to mimic a HID keyboard and I found how to send keys and how to release ALL of them, by calling usbSetInterrupt() with 0 for the key value, but is there a way to ...
0
votes
1answer
117 views
Arduino MEGA ADK: read data from usb(not serial)
I'm new on this field and I've spent my last 3 days searching for a way to read some data from a usb device(http://www.willow.co.uk/TelosB_Datasheet.pdf). It sends packets of 12 octest and all I want ...
9
votes
1answer
138 views
Basic protection for USB interface
I have never protected my USB interfaces for microcontrollers until a USB port of my PC stopped working because of a bad connection aparently. So I'm starting to protect them but I found some ESD IC's ...
-1
votes
3answers
137 views
tiny dtmf dialler [closed]
I would like to create a small dtmf dialler that connects to a telephone line and dials a single preprogrammed telephone number when a set of contacts closes, how easy is this and how small could this ...
0
votes
0answers
52 views
Writting in a USB memory
I have a AT91SAM7X-EK card from atmel, and I'm trying to write a string into it's memory then I want to read it back.
I order to do that I parsed the available devices using
...
1
vote
2answers
84 views
Where I can find an USB dongle to connect two devices with external power?
Can you please tell me where I can find an USB dongle which follows this diagram:
I have a tablet and a BobjGear USB to RJ45 Ethernet Adapter, but the battery will discharge while using the tablet ...
0
votes
0answers
39 views
Integrating USB Camera on TI Hercules Evaluation Kit (ARM Cortex R4)
I am using a TI Hercules Evaluation Kit, which can act as a USB Host.
Here's the link [http://www.ti.com/tool/tmdxrm48hdk]. It is a ARM Cortex R4 with 8 MB of SDRAM.
I want to use a Logitech Webcam ...
