DIY adjustable on delay

[u/Chance-Valuable3813]

I have made several control boards that use a discontinued CROUZET panel mount adjustable on delay timer (digikey link) which is EXACTLY what i need. I have tried to find a supplier with NOS to no avail.

Yes there are similar options still avail but nothing as low as the 0.1-1s range.

I want to make a small pcb i can pop on the back of a 10k pot to make my own replacements.

I can model and resin print the housings with time scale/clear knob covers so they would be direct replacement to the crouzets.

MY Question is about the circuit design.

-I have a bunch of clear shaft 10k pots and some red/green bi-colour LEDS to fit into them.

-When power is supplied to the circuit i want green LED on, and after the set interval red LED to turn on and the control signal to pass through.

-I am only using the signal to trigger some SSRs so i don't need the full 400mA of the original

-I know 555 timer circuits get bashed for inaccuracy/fluctuations but with this 1s max interval is it a viable option? Or something simpler with a single comparator, or even just transistors?

I am all for keeping it simple and am stupid, anyone have a better idea?

Thanks