Hi Folks. a couple of years back I made a nice little OD logic box. It had a couple of big(ish) relays and a large capacitor to make things work. And it did work. It did everything that you would want. It cost about £10 in parts but i took a fair bit of R&D to make everything do what it should.   The difficult thing with these boxes is the switch. It needs to be a momentary switch with a long stalk - not common. The normal toggle switch, because of the long stalk, ha