A nice page and a source of some good projects is the one of Makis, SV1AFN.
The page can be found at sv1afn.com.
I purchased the step attenuator control module with 2x 32dB attenuator blocks. The both blocks can either be used in parallel always set to the same attenuation level or in series allowing a maximum attenuation range of about 62dB.
Build into a small enclosure it gives a really nice unit for your daily usage.

sv1afn step attenuator – front

sv1afn step attenuator – rear