timing signals query?

[HobbitFertang]

Hi Folks, Is there a circuit board available for timing/switching 12V that doesn't involve programming. I'm thinking of switching green to red signal using a reed switch but with delay? or something similar?? This would be solar powered.

 

[GAP]

There you go this should get you started

https://www.amazon.co.uk/s?k=NE555+Relay+Timer&camp=1634&creative=6738&linkCode=ur2&linkId=27b11f3d34288abc4d83859d0b5857e6&tag=robojax0a-21&ref=as_li_qf_sp_sr_tl

 

[Software Tools]

Another one from Amazon.... has a variable delay adjustable up to 60 seconds, which may be more useful for railway signalling purposes.. About AUD $18 for a pair in Australia, so probably about 9 quid in the UK.