Recently a bunch of questions have been re-tagged with tags indicating the value of the supply voltage in whatever circuit is being discussed.
Is this really necessary?
Are circuits run on 9 V so much different from circuits run on 5 V that they should be distinguished by different tags? Are questions about "9 V" circuits so special that somebody might be searching for them specifically? And wouldn't get useful information from questions about 12 V circuits?
I propose to remove all the tags (
3.3 V, etc etc) as not making a useful distinction about the posted questions.