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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
Teensy and Teensyduino
6. July 2009 - 11:27 — admin
The Teensy is an USB development system, based on AT90USB162 AVR.
Image an Arduino "cousin" with built-in USB interface thanks to AT90USB162 microcontroller... Do you have it? Fine, you've got the Teensy!
The Teensy USB Development Board is a complete USB-based microcontoller development system. You can use Teensy directly in a breadboard due to its size. All you need to use Teensy is the USB A-miniB cable.
Unlike the Arduino, which converts 38.4 kbps serial to USB, the Teensy has direct 12 MBit/sec USB access, so communications are sent and received at full USB speed.
Direct USB access is possible, so the Teensy is not limited to being only a serial-type USB device. It can act as HID, Mass Storage, or nearly any type of USB device. The Teensy also has a serial port. It is not connected the USB port and can be used separately.
The Teensy is available in the PJRC shop: [?https://www.pjrc.com/store/teensy.html Teensy]
They provided also Teensyduino. Teensyduino is a software add-on for the Arduino IDE, which adds the ability to build and run sketches on the Teensy. You can download Teensyduino here