168mhz 32bit microcontroller complete eval/test board for under $20!
http://www.st.com/internet/evalboard/product/252419.jsp
Data Brief: http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATA_BRIEF/DM00037955.pdf
"Description
The STM32F4DISCOVERY helps you to discover the STM32F4 high-performance features and to develop your applications easily. It includes everything required for beginners and experienced users to get started quickly.
Based on the STM32F407VGT6, it includes an ST-LINK/V2 embedded debug tool, two ST MEMS, digital accelerometer and digital microphone, one audio DAC with integrated class D speaker driver, LEDs and push buttons and an USB OTG micro-AB connector.
A large number of free ready-to-run application firmware examples are available on www.st.com/stm32f4-discovery to support quick evaluation and development.
DATA BRIEF
Key Features
* STM32F407VGT6 microcontroller featuring 32-bit ARM Cortex-M4F core, 1 MB Flash, 192 KB RAM in an LQFP100 package
* On-board ST-LINK/V2 with selection mode switch to use the kit as a standalone ST-LINK/V2 (with SWD connector for programming and debugging)
* Board power supply: through USB bus or from an external 5 V supply voltage
* External application power supply: 3 V and 5 V
* LIS302DL, ST MEMS motion sensor, 3-axis digital output accelerometer
* MP45DT02, ST MEMS audio sensor, omni-directional digital microphone
* CS43L22, audio DAC with integrated class D speaker driver
* Eight LEDs:
o LD1 (red/green) for USB communication
o LD2 (red) for 3.3 V power on
o Four user LEDs, LD3 (orange), LD4 (green), LD5 (red) and LD6 (blue)
o 2 USB OTG LEDs LD7 (green) VBus and LD8 (red) over-current
* Two push buttons (user and reset)
* USB OTG FS with micro-AB connector
* Extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing"
(http://www.st.com/internet/com/MULTIMEDIA_RESOURCES/IMAGE/BOARD_PHOTO/stm32f4_discovery.jpg)
Cool tao.
Where is the "buy it now" button?
THERE: http://www.mouser.com/ProductDetail/STMicroelectronics/STM32F4DISCOVERY/?qs=J2qbEwLrpCGdWLY96ibNeQ%3d%3d
$16.25 :)