Electrickery advise needed

Using the patented Mavis Beacon "Hunt&Peck" Technique, Andy Bonwick

That works too.

 

Shame they don't do those 'Smiths' stick on after market rear heated
screens anymore ..

Paul.

 

Ah well there you go. Proved wrong again.

--
Malc

Rusted and ropy.
Dog-eared old copy.
Vintage and classic,
or just plain Jurassic:
all words to describe me.

 

might be a bit big
http://cgi.ebay.co.uk/CLASSIC-CAR-REAR-SCREEN-DEMISTER-NEW-OLD-STOCK_W0QQitemZ120478434340
Steve

 

I remember fitting one of those in a Morris Minor. It made the rear screen
really toasty warm, great if you wanted to warm your hands up outside the
car. The heating element was IIRC a tad thick for a visor though.


--
Malc

Rusted and ropy.
Dog-eared old copy.
Vintage and classic,
or just plain Jurassic:
all words to describe me.

 

....at three and fourpence a pint?

 

Ah, so that's what you're trying to do! Why not just wire up a few
resistors below your chin or just along the bottom of the visor opening
(i.e. just above your nose) and let the normal airflow pull the (now
warmed) air up and past the visor keeping it frost free? To be a bit
safer make up small metal cover to separate the resistors and your skin.
You also won't have to worry about the wiring between visor and helmet
shell with the heat source fixed to the helmet instead of the visor. With
a visor insert the combination of the airflow and the warmth should keep
it clear.

 

Depending on what resistances you need, but a simple fire bar is dirt
cheap and has metres of wire on it.

 

You can still buy conductive paint.
http://www.maplin.co.uk/module.aspx?moduleno=36275

You could probably thin it with a solvent to adjust the resistivity
so a fine line across the visor would be OK for 12v.

 

ITYM go on holiday somewhere warm(er).

 

That's the sort of thing I want but I reckon I can make something
that'll do the job.

 

This is going to be fascinating. Do post pictures of the inevitable
facial burns!

 

What can go wrong?

It might not be a good idea for those of us who choose not to use a
razor but I don't think anyone of that persuasion is coming on this
trip.

 

Oh, I'm sure everything is going to just fine.

Really.

 

I've got a bag full of bits, a gas soldering iron, an old crash helmet
(1) and a visor to play with.

I'm going to see how easily (and effectively) the wire glues to the
visor with superglue and I've got loads of 0.5mm drills that will be
just right for drilling through the visor if I decide to go down that
route as well.

I've decided that the ends can be securely fastened by 'welding' the
wire onto the visor with a couple of old cable ties and the trusty
soldering iron so stand by to see pictures of a burning crash helmet
posted up by this time tomorrow.

I'm starting to enjoy being off work and though my hand hurts a bit
when I take my bike gloves off actually riding the bike isn't a
problem.

(1) You didn't think I'd do this to a nearly new crash helmet did you?

 

I've been clean shaven for about a month in the past several years

 

Useful reading here and a possible solution
www.willow.co.uk/html/resistance_heaters.html

 

Don't worry, I'll lend you a razor if you:

a) come with us.
b) fit a heated visor.
c) find it's singing your beard.

I've got plenty of wire, connectors are cheap, you've got an accessory
socket on your RS and I'll have tested the idea out. There's **** all
to worry about when you consider the bigger picture.

 

In message

There's a site in Merkin-land selling them.

 

I was referring to your suggestion that I wasn't in. I already have
everything required and the most time freedom.

As for your heated visor ideas, what you need is already manufactured.
Flexible transparent heated films made to protect LCD displays. About the
right sizes available.

A (good) Arai visor is a flat curve rather than convex, so easy to apply
things to.

www.minco.com/uploadedFiles/Products/Thermofoil_Heaters/Thermal-Clear/hs202g-thermal_clear.pdf

But WTF you get them in small numbers in the UK I do not know.