Hello
I have to work with some old circuits that use some underground wiring to another circuit bleh blah.... in short terms. I have to accept that 230v is what I am supplied with as an input signal for my circuit, a signal that is switched on when a car drives by some old laser beam things.
Only the signal for an input pin that is. My circuit runs on its own supply.
How can I do this?
Would a trafo 230v to 5 v and acdc converter be the way to go?
Find a 230 VAC or 220 VAC to 5 VDC wall wart. Just make sure the wall wart for your given voltage does not exceed 5 VDC. That is what I would consider based on what you have mentioned.
Hereabouts, the second-hand (Thrift) stores have lots of older transformer wall-warts which they practically give away (price is one third of Starbucks Coffee). They will switch off quicker than a lightly loaded SMPS type.
How fast an event are you sampling? You might have to put an artificial load on the wall-wart to more quickly discharge the internal capacitor...
That price is free. I was not aware of this component, I was of the idea, that a kontakter might be the only way before. But I am noobie ^^ Ty perfect, what I do ofcourse.
Be aware that power relays do not do well switching a very small DC current. That type of relay relies on a bit of an arc to keep the contacts clean... Hard to do switching a couple of mA to a micro port...
Be aware that power relays do not do well switching a very small DC current. That type of relay relies on a bit of an arc to keep the contacts clean... Hard to do switching a couple of mA to a micro port...
Be aware that power relays do not do well switching a very small DC current. That type of relay relies on a bit of an arc to keep the contacts clean... Hard to do switching a couple of mA to a micro port...
No wait, I understood your english now. Hmmm that sucks so you say that contacts will lose the surface for leading the eletricity? That kinda could suck