Hi,
I struggle to even use the correct subject title to capture what I mean - hopefully I am better at explaining it:
I am trying to design a circuit which can be described as follows:
1. A 12v input gets applied to the circuit and remains applied.
2. A 12v output is connected to a lamp, which glows briefly (say 2-5 sec) when the 12v input is applied.
3. After that short period, the lamp stops glowing even though the 12v input remains.
4. If the 12v input is removed we are back at step 1.
I have considered a monostable 555 IC, but that appears to work on the basis of there being a trigger button, rather than a switch where the state changes and stays changed beyond the timer period.
I can imagine a simple circuit with a very large capacitor in series with the lamp, where current flows through the lamp until the capacitor becomes charged, but my guess is the required size of the capacitor would not be practical, even if the lamp were modest.
Any guidance will be most appreciated,
Billy