i am making a laptop using raspberry pi and for that i want 4 screens instead of dual.
so for that i want to interface two raspberry pi .
any idea how to do that
Have you tried the RPi forums?
nah, will check out
thanks
RPis have UARTs on the GPIO pins. You'll have to find the Rx, Tx, and Gnd pins on yours and attach Rx to Tx, Tx to Rx, and Gnd to Gnd, then figure out how to send messages.
We just started playing with a Pi4 to find out how to use it as USB master to talk to USB slaves using FT232 modules as that seemed a quicker way to go vs figuring out the UARTs. We'll see how today goes.
Watching the Dragon2 getting ready to dock with ISIS right now.
CrossRoads:
Watching the Dragon2 getting ready to dock with ISIS right now.
Hope not! 
ISIS is too busy infecting people with measles and soon COVID.
Did you mean the ISS?
i had seen it lunch yesterday and wow what wonderful moments
i hope on sitting on it for a trip to mars( if the space capsule is powerful enough)
do you think thatt we will be able to build more advanced rockets like the space shuttle without the boosters
aadidahiya13:
do you think thatt we will be able to build more advanced rockets like the space shuttle without the boosters
I sincerely hope not. It is all a complete waste of money.
And we have done enough damage to our planet - let's leave other ones alone.
...R
Yes, ISS. Thought ISIS looked a little odd.
I don't see how we get into Earth orbit without a booster. Takes a lot to boost cargo & fuel to 20000 km/hr to get up to 250-260 miles high and then beyond.
aadidahiya13:
i hope on sitting on it for a trip to mars( if the space capsule is powerful enough)
Then you will be in for a very boring time!
CrossRoads:
I don't see how we get into Earth orbit without a booster. Takes a lot to boost cargo & fuel to 20000 km/hr to get up to 250-260 miles high and then beyond.
It seems the current design is to use a recyclable booster - it actually landed itself!
The Space Shuttle - one version IIRC - used a standard airplane as a booster.
Robin2:
I sincerely hope not. It is all a complete waste of money.
Did have a few technology spin-offs.
Robin2:
And we have done enough damage to our planet - let's leave other ones alone.
You do have a point there. 
Paul__B:
Did have a few technology spin-offs.
I doubt if we would have noticed if they had not happened.
...R
Paul__B:
The Space Shuttle - one version IIRC - used a standard airplane as a booster.
No, they used a converted 747 to transport the orbiter from landing site (Edwards AFB?) to launch site. They may also have used it for some unpowered landing tests.