See how I made a set of flashing Lego level crossing lights, like the ones seen all round the UK.
Based on a very cool, vintage, Lego piece from the 9 volt “Light and Sound” theme which only ever appeared in 3 sets!
I know that there are MANY sets of flashing LED lights, which you can buy for Lego sets, but I'm a bit of a purist, so wanted to try and make them using all Lego parts.