FRAM memory

bte2

So I was turned on to FRAM memory like this: http://www.cypress.com/file/141321/download

Bus-speed writes, doesn't wear out, 151 year retention, good temp specs, not too expensive... It seems perfect, so what am I missing?

Mike Green

Reads are destructive ... a read operation requires a re-write of the data back into the memory. This is done automatically, but it counts against the wear limit estimates.

Wossname

bte2 wrote: »

151 year retention

... by which time the Propeller 2 will be available (maybe).

Delus

Our definitions of "too expensive" differ, but hey if someone wanted to put a propeller in space this could be cool

Heater.

Propellers don't work in space.

Wossname

Heater. wrote: »

Propellers don't work in space.

And yet there is solar wind. Go figure.

Publison

Wossname wrote: »

Heater. wrote: »

Propellers don't work in space.

And yet there is solar wind. Go figure.

Good point.

Heater.

Wossname,

And yet there is solar wind.

Hmm... wonder what size and kind of propeller one would need to push against the solar wind and interstella gas to make propulsion ?

Wossname

Heater,

By my calculations, a standard aerofoil type propeller would have to be made of flawless graphene and have a diameter less than the nucleus of a helium atom (by definition impossible). It would need to be held in a near infinitely dense magnetic field (also impossible). It would have to be spinning with a tip-velocity of more than 4*pi*c (impossible) in order to get a positive "airspeed" towards the sun. It would have to be 100.00000% perfectly reflective (tricky). Alas the gravitational well caused by such a thing might make such endeavors somewhat unfeasible.

Worth a try though

tomcrawford

Arthur Clark wrote a pretty cool story called Wind from the Sun.

Cluso99

Didn't NASA make a sail to test the solar wind. Made out of some ultra thin material.

Seairth

Cluso99 wrote: »

Didn't NASA make a sail to test the solar wind. Made out of some ultra thin material.

Don't know about NASA, but The Planetary Society is working on one.

MikeDYur

Cluso99 wrote: »

Didn't NASA make a sail to test the solar wind. Made out of some ultra thin material.

NASA's been all over this.



http://antwrp.gsfc.nasa.gov/apod/ap110128.html

http://antwrp.gsfc.nasa.gov/apod/ap040821.html

http://antwrp.gsfc.nasa.gov/apod/ap150619.html

Cluso99

Thanks Mike. I was quite sure I had seen this quite a long time ago.

Tor

The Japanese tried this first. The Planetary Society tried even earlier, but had a launch failure.

Wait.. this was about FRAM, how did we get here?
I thought retention was more than 151 years, but I haven't read anything other than a booklet called "FRAM for dummies" that TI sent me. Looked very interesting though.

Wossname

Tor wrote: »

I thought retention was more than 151 years

Uhhh, hmm can't quite remember.....

veluxllc

Wossname wrote: »

bte2 wrote: »

151 year retention

... by which time the Propeller 2 will be available (maybe).

MAAAAAYYYYBE...

veluxllc

Wossname wrote: »

Heater. wrote: »

Propellers don't work in space.

And yet there is solar wind. Go figure.

So I guess we can make a SOLAR Propeller.