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 flight
7 logs over a USB connection to a computer running Linux, Mac OS or
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 hardware, but new firmware that
19 includes the data download feature is necessary to use the MicroPeak
22 ## MicroPeak Interface ##
24 MicroPeak transmits the entire flight log via the LED just after
25 reporting the last flight altitude at power up. The data are
26 transmitted in regular 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 orange LED. This makes
31 aligning the two boards by hand quite easy.
33 ## MicroPeak Application ##
35 Java application that runs on Windows, Mac OS X and Windows.
36 Captures and saves data, provides plots and statistics.
38 <img src="micropeak-graph.png"/>
42 Here's a close-up view of the hardware
45 * ROHM RPM-075PT Phototransistor
46 * Peak sensitivity matches MicroPeak LED color
47 * [ST Micro TSV521](http://www.st.com/internet/analog/product/251123.jsp) CMOS op-amp
49 * [FTDI FT230](http://www.ftdichip.com/Products/ICs/FT230X.html) Serial to USB adapter
50 * Drivers available for Linux, Mac OS X and Windows.
53 * [gEDA](http://www.gpleda.org/) for schematic capture and PCB layout
56 * The hardware is licensed under the [TAPR](http://www.tapr.org) [Open Hardware License](http://www.tapr.org/ohl.html)
58 <center><img src="../logos/micropeak-usb.svg" height="64"/>