1 [[!meta title="MicroPeakUSB"]]
2 <img src="../logos/micropeak-usb-oneline.svg" height="100"/>
4 # MicroPeak USB Interface #
6 The MicroPeak USB Interface board provides a way to capture
7 [MicroPeak](../MicroPeak/) flight logs over a USB connection to a
8 computer running Linux, Mac OS or Windows.
10 <a href="v1.0/MicroPeakUSB.jpg"><img src="v1.0/MicroPeakUSB-640.jpg"></a>
14 * Stored in on-chip 512B eeprom
15 * Records raw barometer readings every 192ms
16 * Enough storage for 48 seconds
18 No changes are needed to the [MicroPeak](../MicroPeak/) hardware, but new firmware that
19 includes the data download feature is necessary to use the MicroPeak
22 ## MicroPeak Interface ##
24 [MicroPeak](../MicroPeak/) transmits the entire flight log via the LED just after
25 reporting the last flight altitude at power up. The data burst is
26 transmitted in a simple serial format at 9600 baud.
28 The MicroPeak USB Interface board contains a phototransistor,
29 op-amp and serial-to-USB interface chip. It also includes a blue LED
30 which blinks in time with the [MicroPeak](../MicroPeak/) orange LED. This makes
31 aligning the two boards by hand quite easy.
33 ## MicroPeak Application ##
35 The MicroPeak application written in Java runs on
36 Windows, Mac OS X and Linux. It captures and saves the flight data, then
37 produces plots and statistics. More information is available on the main
38 [MicroPeak](../MicroPeak/) page.
40 <img src="micropeak-graph.png"/>
44 Here's a close-up view of the hardware
47 * ROHM RPM-075PT Phototransistor
48 * Peak sensitivity matches MicroPeak LED color
49 * [ST Micro TSV521](http://www.st.com/internet/analog/product/251123.jsp) CMOS op-amp
51 * [FTDI FT230](http://www.ftdichip.com/Products/ICs/FT230X.html) Serial to USB adapter
52 * Drivers available for Linux, Mac OS X and Windows.
55 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
58 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
60 <center><img src="../logos/micropeak-usb.svg" height="64"/>