Charge and protect your devices while blocking data syncing and “juice jacking.” For work, home, travel, everywhere!
If you charge via USB – which all smartphones and tablets do – Umbrella will protect your data. When connected to any USB port, Umbrella allows power to flow to your device so it can charge, but physically disconnects the data connections – eliminating any possible data theft or leak.
Umbrella USB – [Link]
This USB to serial converter project is easy to build, it is simple and inexpensive. It is based on the FT230XS from FTDI Chip.
USB to Serial converter using FTDI FT230X – [Link]
This USB to serial (TTL) converter project is easy to build, it is simple and inexpensive. It is based on the PL2303SA USB to USART bridge from Prolific.
USB to Serial converter using PL2303SA – [Link]
As promised we have built a transceiver USB dongle, for receiving data from various sensors like, smart meters, smoke detectors and temperature/humidity sensors. We’ll provide some code examples on how this trasciever can be used, and software for decoding data from diferent sensors enumerated above.
USB RF 433.92 MHz Transceiver module – [Link]
7-42VDC Input 5V 2A USB Output Power Supply. Compatible with Raspberry Pi, Arduino, iDevices, Mobile Phones and other USB Devices.
Having to use a Raspberry Pi and other USB Devices in an electronics production environment where 5V isn’t standard, I have noticed a lack of power supplies capable of fitting in. A unit had to be designed to fit into systems where 12V & 24V are the norm or where batteries / solar panels etc are the only supply method available.
7-42VDC to USB Supply/Charger – [Link]
This project started out from a need build a simple device for monitoring the CAN bus. I chose the NUC140LC1CN 32K Cortex-M0 microprocessor from Nuvoton for major reason – it has both USB and CAN peripherals.
- Simple design
- Compatible with the LAWICEL CANUSB protocol
- Exposing itself as USB FTDI device
- Supporting CAN 2.0A 11-bit and CAN 2.0B 29-bit frames
- Has internal FIFO CAN message buffer
- Self powered from USB port
- Flash-resident USB mass-storage device (MSD) bootloader for firmware updates
- Firmware is available for download
CAN-USB Interface – [Link]
Organic LED, microprocessor controlled, intelligent energy source for all of your electronic devices.
Legion is a portable energy source with a built-in Organic LED display coupled with a microprocessor. It can charge any USB powered electronic devices. Unlike a traditional portable battery where you’re left in the dark about the state of charge of your battery, Legion learns how you use your electronic devices and displays precisely how much more time (day:hours:minutes) you have remaining until you run out of power. Legion uses premium grade Lithium Polymer batteries designed to maximize your energy density while packing it into the smallest area possible. Legion is proudly designed in Silicon Valley, California.
LeGion Halves Phone Charge Times – [Link]
Scasagrande shared his USB isolator project, that is available at Github:
I received inspiration for the project from other USB isolator projects on the internet. Mine features a few improvements to many of them:
USB-B and micro-USB connectors on the host (upstream) side
In addition to accepting power via the barrel connector (which goes through a basic 7805 low dropout linear regulator), there is also a micro-USB port for device-side power. This allows you to use the now common cell phone charger cube to power your isolated device
Push-button switch for easy USB disconnection events
Bypass jumper for linear regulator, allowing for 5V power from the barrel connector
Encased in a small box to protect the IC from the world
USB isolator project – [Link]
by Kalle Hyvönen:
I’ve been thinking about making a temperature logger for my room and my computer, I set on using DS18S20 sensors from Maxim because they’re common, cheap and overally pretty ideal. My computer is so new that it does not have a serial port (not 100% sure, I think there might be a pinheader on the motherboard with serial port connections) so I have to use USB for interfacing. Next thing I had to do was to make an USB to 1-wire adapter so I could attach the sensors to my computer.
I browsed around for a while and set on using the DS2490 USB-to-1-wire adapter chip because the circuit for it looked pretty simple. I modded the component values a bit from the ones on the original schematic from Maxim to ones I had in hand. I used 0805 sized SMD components because I have those in store.
USB-to-1-wire Adapter – [Link]
Are you encountering any issues with developing a full-speed USB application on NXP’s LPC microcontrollers? This application note from NXP highlights some of the important issues that you need to be aware of for a typical full-speed USB application. [via]
Implementing full-speed USB on NXP’s LPC microcontrollers – [Link]