It needs a voltage regulator. The HC-SR04 requires +5V, anything more will damage it.

Any 5V sensor you plug into the V4 board will need a voltage regulator unless you are powering the V4 with 5v (which you probably wouldn't be)... So the quick answer is yes you need a 5V regulator....

That's weird ...not sure if it is just me, but posts 1# and #2 in this thread have been reversed.... Rich's reply is post #1....

Thanks good info. I think Rick must be psychic

The forum time went a little funny earlier which has made forum post go in a funny order in some cases. I'm good but I'm not that good

@Rich... You have invented time travel, haven't you? .... I knew it...

:D

Rich is messing with his ezb metaphysical psychic reader adviser program. It looks like it's working great.

OK you got me, I was testing out my design for the new EZ-Bit flux capacitor and accidental use them with the Dagu 4Channel Motor Controller and this example

:D