Current is more dangerous than voltage. So long as one limits the power supplied on the input, the current the output can supply should be quite small, on the o

Current is more dangerous than voltage. So long as one limits the power supplied on the input, the current the output can supply should be quite small, on the order of microamps. It's not fun to be shocked by around 3 KV at low current, but it's not fatal. The capacitance of the electroadhesive pad should be rather small, so even the stored energy shouldn't result in a very large current. It is a good idea to add a current limiting resistor between the pad and the power supply. Not just for safety, but also to limit damage to the power supply in the event of arcing. A bigger problem is that sensitive microelectronic devices tend to mysteriously fail around high voltage power supplies.