The neurotechnology is called transcranial direct current stimulation, or tDCS for short. At its simplest, the method involves a device that uses little more than a 9-volt battery and some electrodes ...

TENS devices use a different waveform to tDCS and target cranial nerves rather than the brain itself, but they rely on a similar controller and head-mounted electrodes.

Matt Herich uses a tDCS device that was made by another student he met on Reddit. Four 9-volt batteries and sticky self-adhesive electrodes are connected by a circuit board that sends a constant ...

He's a 28-year-old medical device consultant in San Francisco who heads the Bay Area Brain Hackers group. He made his own tDCS machine using an elastic headband and a couple of electrodes.

A headset that can be worn at home to stimulate the brain and treat depression has passed an important research milestone.

And sales of the devices spike at fairly regular times, says Robin Azzam, CEO of a leading tDCS retailer Caputron: around college midterms and finals. Caputron also helps point customers to academic ...