Why I recommend making a Cossack rather than an Eliza bucket hat.
If you are thinking of buying a light device, make sure that it is made with individual LEDs, not a LED strip.
A device with individual LEDs is more likely to last, it will have better heat management, and it is more likely to be value for money.
As an example, a few weeks ago I made a LED strip device for my back. It uses standard gel-covered LED strip – the sewing is a bit weird but it was functional and felt pretty nice on my back after a day in the garden.
When I first made it, all three LED strips worked very happily. But as of yesterday, one of the LED strips decided to stop working part-way along its length. LED strips do that – they just stop lighting up.
There’s not much I can do about the bung LED strip. I’ll continue to use my home-made device on my back for the moment, but if more of the LED strips decide to conk out, I’ll pull it apart and make another.
The lesson is clear, though.
If you are thinking of buying a commercial light device, avoid those made with LED strips.
I’ve had a query about 12V near-infrared LED strip, especially 850nm LED strip.
You can see 850nm, but only just! 850nm is at the very edge of the eye’s ability to see. If you turn on the 850nm LED strip in a dark room, you will see a nice pale red glow. It’s red, but to our eyes it seems pretty dim. That’s good, that means it is working.
Take a generous length of the hat padding being used, and
Fit around the head like a head band.
Adjust to fit comfortably around the head and stick together with adhesive tape .
Don’t cut the foam yet!
Mark the join,
Add 2cm to make the band a bit looser, then
Cut the padding and tape the ends together to form a circle.
Adjust this head
band for easy slip-on comfort and for it
to have a jaunty tilt towards the back of head. Once satisfied with this,
measure the final length. This is the final basic circumference for the
preparation of the wire mesh frame.
MEASURE THE HEIGHT OF THE HAT.
Like the circumference, this will depend on the individual.
Typically, 9 squares deep (=120mm) is a good height and allows for either an elastic suspension, or for some 6mm foam pads stuck to the top.
A simple paper or cardboard pattern helps to determine these dimensions.
Cut a paper pattern 150mm high and the above circumference.
Mark the 9 square(120mm) position, and
Tape the pattern into a hat shape.
Check the height to the top of the head, and
Cut the paper to the height needed to fit a padded top for the hat.
* Wire ends are sharp and can cause cuts. So please wear gloves!