pebe wrote:I thought you said you wanted it to switch on at +12V and ignore the +5V pulse, ie. stay switched on during the period when the voltage dropped to +5V .
If so, an SSR with a +4V input threshold, will switch off below +4V (0V is below +4V), and switch on above 4V (+5V or +12V).
Does that make sense?
No it's the opposite that I said. Let's say that turn signal is off. In that off state controller keeps sending 10ms 5v pulses every 30 secs. That results in brief LED flash. I do not want that. I want the turn signal LEDs to stay off at +5V. The LEDs must come on only when the 12V is applied. So my desired setup is:
0V = Off
5V= Off
12V= On