1 [[!meta title="EasyMotor"]]
4 This board is designed for in-flight characterization of research rocket
5 motors. It records chamber pressure and acceleration to an on-board flash
6 memory chip, the contents of which can be downloaded after flight over USB.
12 * Data logger storing motor chamber pressure and acceleration
13 * supports inexpensive 5V analog output pressure sensors
14 * 3-axis 200-g accelerometer
15 * On-board non-volatile memory for flight data storage
16 * USB for configuration, and data recovery
17 * Designed for use with a battery from 9-12V
18 * 1.5 x 0.8 inch board
20 ## Example Installations ##
22 These photos are from snap-ring case forward closures machined by Bdale for
23 test flights of EasyMotor. The sensor bodies are 316 stainless with a 1/8 NPT
24 male boss, so the approach chosen is to drill a 1/8 inch touch hole all the
25 way through the closure, then drill and tap 1/8 NPT female threads part way
26 through the closure thickness. The hole gets filled with grease and the
29 <a href="photos/IMG_20200905_112722.jpg"> <img src="photos/IMG_20200905_112722-thumb.jpg"></a>
30 <a href="photos/IMG_20200907_101910.jpg"> <img src="photos/IMG_20200907_101910-thumb.jpg"></a>
31 <a href="photos/IMG_20201010_142952.jpg"> <img src="photos/IMG_20201010_142952-thumb.jpg"></a>
35 The firmware for this product is part of the [AltOS](../AltOS) suite.
37 This board was designed using lepton-eda and pcb-rnd.
39 The hardware design files are available from
40 [git.gag.com](http://git.gag.com) in the project
41 [hw/easymotor](http://git.gag.com/?p=hw/easymotor;a=summary).
45 Prototypes of v2 were built and successfully flown. An initial production
46 batch is now underway, and we hope these will be for sale around the end of