X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=EasyMotor%2Findex.mdwn;h=a6a2eaa62e08730ae4657bce8ceb5f9d34e665e9;hb=5cfce0ab720507ac3ba13aaf58f85e28a81c2a26;hp=f50a33b4ef5c14bad2afc34820b11915f56a4f88;hpb=245fe0baa4f576c56253c43ef9226d0ef9360ec5;p=web%2Faltusmetrum diff --git a/EasyMotor/index.mdwn b/EasyMotor/index.mdwn index f50a33b..a6a2eaa 100644 --- a/EasyMotor/index.mdwn +++ b/EasyMotor/index.mdwn @@ -4,29 +4,44 @@ This board is designed for in-flight characterization of research rocket motors. It records chamber pressure and acceleration to an on-board flash memory chip, the contents of which can be downloaded after flight over USB. -It can also be attached to a [TeleMetrum](../TeleMetrum) or -[TeleMega](../TeleMega) using the companion interface to allow a subset of -the data to be included in radio telemetry during the flight. - -There is no EasyMotor firmware yet, but it will be part of the -[AltOS](../AltOS) suite eventually. - -Prototypes of v1 are underway. This design is not yet for sale. ## Features ## ### User View ### * Data logger storing motor chamber pressure and acceleration -* 1-axis 200-g accelerometer +* supports inexpensive 5V analog output pressure sensors +* 3-axis 200-g accelerometer * On-board non-volatile memory for flight data storage * USB for configuration, and data recovery * Designed for use with a battery from 9-12V -* 1.65 x 1 inch board +* 1.5 x 0.8 inch board + +## Example Installations ## + +These photos are from snap-ring case forward closures machined by Bdale for +test flights of EasyMotor. The sensor bodies are 316 stainless with a 1/8 NPT +male boss, so the approach chosen is to drill a 1/8 inch touch hole all the +way through the closure, then drill and tap 1/8 NPT female threads part way +through the closure thickness. The hole gets filled with grease and the +sensor screwed in. + + + + ## Artifacts ## -The hardware design current gEDA files are available from +The firmware for this product is part of the [AltOS](../AltOS) suite. + +This board was designed using lepton-eda and pcb-rnd. + +The hardware design files are available from [git.gag.com](http://git.gag.com) in the project [hw/easymotor](http://git.gag.com/?p=hw/easymotor;a=summary). +## Availability ## + +Prototypes of v2 were built and successfully flown. An initial production +batch is now underway, and we hope these will be for sale around the end of +calendar year 2020.