Need a circuit diagram...
Discussion
There are some things I just can't do. Languages is one, wiring diagrams is another.
This is the problem; can someone kindly post an idiot-proof answer, preferaby a diagram?
Q1: Captain Simpo has a boat with a heating system that uses a controller and a temperature sensor in the saloon. The two are connected by two-core cable. He wants to fit a second temperature sensor in the engine bay, and be able to select which sensor is operative with a two position switch marked 'Engine Bay/Saloon'. Only one sensor will be used at any time. The switch will need its own cable as it's not possible to wire both sensors directly to it.
He thinks he needs a DPDT switch - but got as far as 8 pencil lines all heading together then got stuck... [50 marks]
This is the problem; can someone kindly post an idiot-proof answer, preferaby a diagram?
Q1: Captain Simpo has a boat with a heating system that uses a controller and a temperature sensor in the saloon. The two are connected by two-core cable. He wants to fit a second temperature sensor in the engine bay, and be able to select which sensor is operative with a two position switch marked 'Engine Bay/Saloon'. Only one sensor will be used at any time. The switch will need its own cable as it's not possible to wire both sensors directly to it.
He thinks he needs a DPDT switch - but got as far as 8 pencil lines all heading together then got stuck... [50 marks]
Thanks for the ideas so far... it might help if we start with what's facing me... this is how it looks:
'Feeds and returns' is getting too complex for my liking (I don't know which is which and the electronic controller might get confused by spare wires hanging about). Hence my desire to switch both wires. I think a DPDT switch has six pins.
As you can see I just need to cross the hole in the middle
'Feeds and returns' is getting too complex for my liking (I don't know which is which and the electronic controller might get confused by spare wires hanging about). Hence my desire to switch both wires. I think a DPDT switch has six pins.
As you can see I just need to cross the hole in the middle
eliot said:
The drawings are correct. o/p the reason you are struggling is that you only have two wires from your switch - for any of the suggestions to work, your switch needs to be located where all your wires converge or you need extra wires leading to your switch location.
That's it exactly - the sensor wires (would) converge in an area under the helmsman's seat which is inaccessible. The physical layout side of it is actually very tricky, and not something I can easily convey!Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff