220v-110v

I have two 'moderately' expensive devices operating on 110 volts, I bought one step down adapter for one. But When I received another device operating on 110 volt, I just wondered if I could connect both these devices "in series" to a 220 volt line. What will happen if I do so ? The devices I...

Hi, I need to pick up a few (4 at least) 220V to 110V adapters to run some household appliances. Any recommendations? Are there popular brands in the market in this segment? One thing I would be looking for is their size. They need to be small and discreet since they'll be strewn all over the...