Hello guys!
I need to design a protection circuit to avoid the destruction of a digital input port. This digital port should accept signals between 0Vdc and 24Vdc. However it is pretty easy to connect a power supply connector with 230 VAC to this input port because both connectors are very similar. Therefore to avoid this wrong connection i need to design an easy protection circuit with some LEDs in order to indicate to the user that the connection is wrong. Anyone has an idea about what component can i use?
Thanks!
I need to design a protection circuit to avoid the destruction of a digital input port. This digital port should accept signals between 0Vdc and 24Vdc. However it is pretty easy to connect a power supply connector with 230 VAC to this input port because both connectors are very similar. Therefore to avoid this wrong connection i need to design an easy protection circuit with some LEDs in order to indicate to the user that the connection is wrong. Anyone has an idea about what component can i use?
Thanks!