tDCS - enclosure and electrode

thingiverse

My design. This DIY tDCS uses a 9v battery. Learn more about tDCS here: http://www.radiolab.org/story/9-volt-nirvana/ You will need M3 screws, 40mm x2. Also M3 nuts, x2. Banana connectors are required, 3 x (generally 2 are enough but for multi-electrodes use 3 holes). Cables with banana plugs for the electrodes are needed too. A 300ohm potentiometer is essential (it can be hard to find...), a 3mm LED (5mm should also fit) and about 10 or 15 ohm resistor, x1 are required. Another resistor for the LED is necessary, 1kohm will work with any kind of 3mm LED. A 5ma amp meter can be found on Ebay. A power switch, 14mm*10mm is needed too. I printed my enclosure using plastic and it turned out great. ABS does not go well with water, so print your electrodes with PLA instead. The PCB is inserted into the upper part of the enclosure without screws, use sandpaper to widen the slit if necessary. Bond the LED to the upper case with a glue gun. Use superglue to bond the 2 parts of the electrodes once they are dry. They are fairly strong and not easy to break. You can also use Stainless mesh from a "tea ball", which is inexpensive, widely available and easy to cut with regular scissors. Cut a cellulose based sponge to fit the electrodes (thickness is about 6mm), or find a 6mm thick cellulose sponge. Have fun building!