I am using a (rather cheap-ish) chinese solid state relay (ssr) with 5V DC on the driving, 230V AV on the driven side (there's an ATtiny85 randomly letting devices run for 10-30 minutes, then cuts the power for 10 seconds, then all over again for stress-testing my embedded audio player).
After the ssr was "up", it only very slowly drops the driven side down to around 10 V AC after the primary side goes down to 0VDC if I don't have a very notable load on the secondary side.
As I'm only turning off a handfull of USB power adaptors, it takes the ssr over 20 seconds to get down to around 10V AC (which seems to be it's off state).
Any idea what I could be doing wrong? I tried "switching" the hot and cold AC line with the ssr, same effect. For now I also switch a lamp which lets the voltage drop almost instantaneously, but in the ling run that can't be the best solution...
As always, thanks for any tips and pointers in the right direction!