December 12, 2018 | ProgressTH We tried to make the screwdriver cordless. With 4 AA batteries, the 6v output sped up the servo nicely and allowed us to use it wherever we went. 

But then again, we were only driving M4-M3 bolts at our workbench and the added bulk of the new cordless design negated the comfortable and small profile of the original design. 

The above picture shows the cordless version at the top. Just below it is our corded version which we've chosen to use day-to-day. Below that are two earlier prototypes. 

Maybe there are better batteries that we can use, but in the mean time, we're using this buck step down power supply (pictured above) to take a 9v wall adapter and stepping it down to 6v. The 5v wall adapter was turning the servo too slow and the data sheet for the servo says it can take a little over 6v. 

The power supply fits easily into the handle of our corded version. 

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