[direct current stimulation]

I was thinking of using this for tdcs transcranial direct current stimulation, my friend participated in an experiment and they used device with this characteristics http://www.newronika.com/products_hdcstim.html

I do not know how they power the device with
# Power: 2 batteries type AA/LR6

[direct current stimulation]

30 v

some guy told me to use something like this to solve skin resistance problem

http://www.national.com/ds/LM/LM334.pdf

[direct current stimulation]

I do not know much about eletronics, but I get around
Could you please help me with this

direct current stimulation
I need a battery powered constant current output of 1-2 mA,I have an Idea how to make this,
but I do not know how to cope with the skin resistance

It is important that the device is current controlled. What this means is that the device will adjust
the voltage up and down as the resistance changes so that the current never changes. For instance, if the
resistance of the skin is 10,000 ohms, then 10 volts will be needed to