puffernutter
Puffernutter
- Messages
- 1,804
- Location
- Wiltshire
Anyone who travels by train may have seen what are called Theatre Signs that are above the coloured signals and can display one or more letters to let the driver know which route is set.
Well here are the innards! This one can show A, T or F. It's a halogen bulb and fibre optics. I've just fitted a relay interface to drive it from a Raspberry Pi. It is in my front garden!
Well here are the innards! This one can show A, T or F. It's a halogen bulb and fibre optics. I've just fitted a relay interface to drive it from a Raspberry Pi. It is in my front garden!