The research on transcranial direct current stimulation of the brain is fascinating. Given how easy it is to build the necessary equipment, there is a great temptation for self-experimentation. But caution is in order.
Here is a piece from the BBC on potential dangers:
“An active forum on reddit is devoted to the technology, and people there have complained of “burning to the scalp”. Another user wrote that they “seemed to be getting angry frequently” after using TDCS.”
peakmemory 
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