I'm new to the forum and ask your expertise and suggestions.
I have a special device, a radar target enhancer that detects radar signals from other ships. When it detects a signal, it drops a line voltage from 5vDC to 0vDC. I want a circuit/Arduino system that will detect the drop in voltage and then signal an LED and buzzer. I'd like to be able to program the unit so that once it detects the signal/drops the voltage, that I don't have to hear/see the 'alarm' for a minute or so (or perhaps can vary the delay).
I'm not sure which Arduino component(s) I need, as well as the programming. Can anyone help? My coming expedition is high-profile and could be a great way for someone/small company to gain excellent exposure.
Thank you in advance for your help and suggestions,