The best modern technology wouldn't last any longer than the best Soviet technology of the '70s.
There are two problems.
1. Heat. This is the big one. Lots of technology we take for granted don't work at 900F. Semi conductors don't work, which rules out nearly all of the most interesting technological advances since the '60s.
2. Energy. There are a few types of semiconductors that would work, but none of them are practical for packaging in an IC and they all use relatively significant amounts of power. Unfortunately, the clouds are too thick for solar panels to work, and if you try to use an RTG to generate power, now you have two problems.
The most likely practical concepts for a long duration lander on Venus call for wind power and mechanical analog computers.
There are two problems.
1. Heat. This is the big one. Lots of technology we take for granted don't work at 900F. Semi conductors don't work, which rules out nearly all of the most interesting technological advances since the '60s.
2. Energy. There are a few types of semiconductors that would work, but none of them are practical for packaging in an IC and they all use relatively significant amounts of power. Unfortunately, the clouds are too thick for solar panels to work, and if you try to use an RTG to generate power, now you have two problems.
The most likely practical concepts for a long duration lander on Venus call for wind power and mechanical analog computers.