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[Ian Robins]

Hi All
I have the drawings of various electronic circuits to control boiler water levels.
But I do not want to fit a water sensor into the boiler as per M beak's.
I am looking for the details to give the require reading via the boiler sight glass.   
Any ideas.



Martin: this cold also be a electronics topic


Thanks
ro88o

[HS93 (RIP)]

have you seen how the cheddar one worked, it shone an led and had a receiver led on the other side, when the beam passed through the glass(no water) it moved the servo.

Peter

[Ian Robins]

hi hs93,
Thats great all i need is a on/off circuit from the led and the M beak's circuit with a pump will work.
I will have a look at RS and Maplins
Thanks
ro88o

[malcolmbeak]

ro88o

A word of warning - the original article as published had an error in the component diagram and I think in the circuit diagram. Not our fault I hasten to add! The article with these errors corrected are available as a download from the paddleducks site. Hope this is of use to you.

Malcolm

[Ian Robins]

Hi Malcolm,
Thanks for the info. Are you coming to the Mayhem Weekend as I would be good to have a chat.
Have you used a water guage for water level control
ro88o

[malcolmbeak]

Hi ro88o

Afraid I can't make it to the mayhem do.
I use an internal probe in the boiler rather than a fitting on the water gauge. As I make all my own plant, it's easy to incorporate the probe during the build. I have one steam plant (not in a boat at present) that has a Scott boiler (not Scotch) that is only one and an eighth inch diameter  and about six long. No room for a gauge glass. With no feed it lasts less than 5 minutes, but using the level control and an engine driven pump it has run for well over half an hour so things must be working OK.
If you want a chat, PM me and I'll let you have my phone number.

Malcolm

[DougMaz]

Hi Malcolm,Any Chance of a drawing or photo of your Automatic boiler control Thanks. Dougmaz

[malcolmbeak]

Hi Doug

Nothing to show in a photo - a probe on a boiler and a box of electronics.
Go to http://www.paddleducks.co.uk/ then go to downloads / steam engine articles / Malcolm Beak. You will find several articles about water level control, gas control, an engine and gearbox designs.

Is this OK?

Malcolm

[Bernhard]

hi
i use this in my Lady Jane...work ok....
http://www.home.earthlink.net/~bfindus/index.html

regards Bernhard