Mikroelektronika release a new USB Reg board. USB REG board is a solution for powering your device over USB connection. It gives 5V directly from USB, but also features MC33269DT power regulator circut for creating 3.3V reference. Board is very small and can be easily integrated in your prototype as well as in your final product. [via]
USB Reg Board – [Link]
Frank documented his music playing alarm clock build. [via]
This Instructable has 18 steps (with demo examples for each building block) and 5 appendices, with about 90 files and pictures, including logic analyzer files/screencaps, expected terminal output, USB device dumps. I sincerely hope you explore all my efforts. I covered everything from SD cards, FAT file system, USB mass storage, IR remote control, LCDs, RTCs, and decoding MP3s. It’s built using a Teensy++ and encased into a SparkFun shipping box.
Musical alarm clock in a SparkFun box – [Link]
Bridge from USB to I²C: [via]
This circuit provides a direct I²C interface to your PC’s USB port. A USB to 1-Wire® dongle supplies the PC with a 1-Wire master, which controls a 1-Wire I/O extender. This I/O extender has two bidirectional open drain ports, which the PC can write to and read from. By generating the right logic signals on these two ports, the PC can emulate an I²C master.
Bridge from USB to I²C – [Link]
This article shows how to make a low cost USB development board for PIC18F4550 similar to Microchip’s PICDEM USB FS board. The Microchip’s USB stack examples can be compiled and loaded directly without altering the code. Access to each of the 40 pins is provided through female headers so that the connections could be extended to a breadboard easily during prototyping. [via]
USB Development Board for PIC18F4550 – [Link]
Simon Inns created a secure USB time stamp device: [via]
This project implements a USB device which provides a real-time clock for the purpose of time-stamping events in an non-networked embedded computer environment. For embedded applications where a periodic time-stamp is required (such as entry-system logs, configuration audit logs, etc.) it is necessary to have a fairly accurate real-time clock (better than that typically provided by a PC’s motherboard) to generate time-stamps in logging and audit trails. Furthermore, it is preferable to have a method of confirming that the log/audit files have not been tampered with in anyway. The secure USB time-stamp device solves many of these issues in a very small form factor using minimal components .
Secure usb time stamp – [Link]
Microchip Technology Inc. has a new, six-member family of 32-bit PIC32MX5/6/7 microcontrollers that provide performance specs of 1.56 DMIPS/MHz, and integrating Ethernet, CAN, USB and multiple serial communication channels, while offering more cost-effective memory options. [via]
Microchip expands 32-bit PIC(R) microcontroller line - [Link]
Measurement of transmitter output RF power has never been easier and more precise. AD8307 USB 0-500MHz RF Power Meter allows to measure the power of transmitters from 1nW to 2W. Output is displayed in dBm, Watts (nW, uW, mW and W range) as well as input voltage. USB RF Power Meter is based on popular AD8307 watt meter IC and PIC18F2550 microcontroller. Instead of using LCD display module the meter connects to a PC via USB port and displays measurements on a computer via USB RF Power Meter software.
0-500MHz RF USB Power Meter using AD8307 – [Link]
Microchip has a new USB->serial converter chip called the MCP2200. dangerousprototypes.com suspected they made this chip from a 20-pin PIC so they decided to check it out. They concluded that MCP2200 pinout is like other PIC uCs, and it has similar reset pin and internal voltage regulator circuits. They write:
We hooked up our trusty PICKIT3 and read the device ID. The MCP2200 was recognized as a PIC 18F14K50! Save a few pennies if you need a 18F14K50 and buy the MCP2200 instead, the MCP2200 is currently cheaper than the blank PIC!
Open source USB stack on MCP2200 – [Link]