...- The risk of an event depends on the silicon size not packaging, so for the same amount of flash at the same process geometry, the risk is roughly the same....
I am not looking for the lowest cost functionality.I am looking for support of the most popular standardized systems. The goal is to open up ISS experimentation to the most users, not to the most sophisticated who can develop radiation tolerant systems the size of a fingernail.My expectation is that a system designed today to support Arduinos and Raspberry PIs would be still supporting those systems years from now, except that those systems will have greater capacity than today.
Iridium was reborn and has succeeded in the original subscriber goals. Not a perfect example.
Quote from: Robotbeat on 02/28/2015 06:39 pmIridium was reborn and has succeeded in the original subscriber goals. Not a perfect example.Iridium was one of this country's worst business failures.The point here is that there two paths to hosting Arduinos at ISSa- require special versions of Arduinos that are more tolerant of radiation but will cost each user a boatload of cashorb- develop a host for Arduinos that would mitigate radiation issues and allow standard Arduinos to be used at ISS.Both are technically possible, but only one would succeed.
You don't have an "A or B" choice. There are literally dozens of microcontrollers that are compatible with the Arduino environment, essentially all of them are cheap, and some have even flown into space before.
If I may give you my economist view, what the expected cost for the client, for the infrastructure (i.e. mechanical, electronics, general integration, shipping, processing, launch, etc.). Do $35 vs $350 make a big difference? How much does 300g of shielding cost? How much does an exta 300cc of shielding cost?
Quote from: baldusi on 03/03/2015 11:06 amIf I may give you my economist view, what the expected cost for the client, for the infrastructure (i.e. mechanical, electronics, general integration, shipping, processing, launch, etc.). Do $35 vs $350 make a big difference? How much does 300g of shielding cost? How much does an exta 300cc of shielding cost?300g is an enormous mass compared to a standard Arduino.A Nanoracks module has a mass of 1000g. Addiing 300g to an Arduino module would make it closer to a Nanoracks module, might as well go with that standard platform, less development time, same mass.
Quote from: Danderman on 03/03/2015 02:19 pmQuote from: baldusi on 03/03/2015 11:06 amIf I may give you my economist view, what the expected cost for the client, for the infrastructure (i.e. mechanical, electronics, general integration, shipping, processing, launch, etc.). Do $35 vs $350 make a big difference? How much does 300g of shielding cost? How much does an exta 300cc of shielding cost?300g is an enormous mass compared to a standard Arduino.A Nanoracks module has a mass of 1000g. Addiing 300g to an Arduino module would make it closer to a Nanoracks module, might as well go with that standard platform, less development time, same mass.Well, what's the target weight, power consumption, and overall cost?
I am looking at the technical issues involving use of Arduinos as controllers at ISS. My opinion is that there may be a niche for Arduinos (and Raspberry Pi) class controllers for experiments, as they are physically smaller than Nanoracks modules, and we all know that it is expensive to transport hardware to ISS.The broad objective is to develop a host for these units at ISS, subject to ISS system regulations, and bearing in mind that there is virtually no crew time available to play with these. They have to be Plug and Play and Forget.My personal objective is to use an Arduino equipped with a Midi interface and a wireless radio to allow musicians on the ground to "play" in real time with anyone at ISS who has a Midi device (like a Midi keyboard), using direct line of sight from a ground terminal (when ISS passes over) and the wireless system. Since Arduinos support Midi and wireless radio, the ISS hardware could be pretty compact BUT Arduinos are susceptible to Radiation events, so I have to figure a way to reboot the Arduino whenever it crashes without the ISS crew spending all of their time sheparding the system.Any help would be greatly appreciated - the Midi scheme might evolve into a KickStarter project for Midiots, and the generic host system might be viable as a business, you never know.
this kickstarter might have a controller you can adapt it uses midihttps://www.kickstarter.com/projects/staskevich/midiwidget-control-anything-via-midi?ref=category_featured
One way to do it is to have the RPi's just do netboots, with no other software storage on board.