having some issues with a touch sensitive switch. ideas? Answered
so a little while ago i had put together a circuit for a touch sensitive switch based off the 555.
it works great, it senses when i touch it and operates an optocoupler from that.
the issue is it senses when i touch anything electrically connected to it. im currently using a power brick to power it (supplying 5v and 12v, the switch is part of a lerger project) and if i touch anything thats connected to ground the switch activates. the part that confuses me is that theres no ground plug, just the two main AC wires. Somehow its sensing through one of those wires as well, and when capitance builds up elsewhere in the system the switch activates.
as far as i know the only way for me to isolate the switch is to power it using batteries. is there any way to power it still using the power supply without it sensing things other than me touching it?