The Human to Human interface is composed by 3 parts:
Arduino: a microcontroller with ability to program, convert analog into digital and connect to usb.
Muscle Spikershield: a bio amp that can read from your muscles, amplify your AMPs and more.
A TENS unit aka a massage unit that send electric pulses to you muscles in order to massage it.
Everyone has a different tolerance to electrical shock, and each muscles reacts in a different way.
We recommend you to setup the TENS with the person you want to stimulate before do the HHI experiment.
For me the best resolute is H on 160, G on 50 timer always C and Mode N
For intensity, D is around 4. Now
be sure the electrodes are well paced and have good contact.
You can use the TENS by itself,
just reattach the RED jumper back to the cable.