Setting custom voltages on your Nexus S can involve messing around with command line codes and scripts, so there is some good news for those running a supported version of Netarchy kernels 188.8.131.52 and up.
XDA forum forum member Jonathon Grigg has written Proton Voltage Control, an app to make setting custom voltages easy!
All you need to do is enter your new voltages in the text boxes or use one of the 3 base settings, hit ‘Apply’ to test out performance, if they look good, re-enter and check ‘Save on Boot’ and finally hit ‘Apply’. Your new voltages should then be applied on each startup.
Proton Voltage Control is fully open sourced.
To download the application and for the link to the source code, head on over to the application thread._________