Post
by matic » Wed Oct 03, 2007 2:41 pm
Still no eye?
You should be aware that LEDs are not simple on/off devices at all.
They can easily fade from one state to another. Also, leds do in fact blend light, totally controllably. LEDs have different lens apertures from 10 degrees to over 90 degrees. this means that the light spread can be tight as in the indicator for a device, or wide spread, like a light bulb.
People that don't work with LEDs everyday usually see the tight focus leds because they are all around us. most LEDs used in products are also frosted to mute the output. So to the layman you can't make a cylon array with them.
However, I used CLEAR LEDs with a 90 degree spread on them. the light spreads through three LEDs or more! Also, I make a circuit that doesn't go from one state to another, like the hyperdyne eye.
You know, the old' on off on off on off that looks so phoney and digital.
Mine sweeps up and down each LED so they blend perfectly. I started out over ten years ago trying to make an eye that would do this.
The hardest part of the thing was to get it to act in an analog way and not the on/off cycle. I came up with a modern circuit that works exactly like the original, using the same built in algorithm.
I responded to this post because there is some disinformation about the properties of LED's and the availability of circuitry which already does what you are trying to do.
I wish your builder the best of luck, there are a lot of issues to consider.
I would give you a piece of advice on this. The design as shown in the image is flawed and will never work for a mobile solution. Get your guy to build you the workable wearable, power friendly, efficient version right out of the gate.
Screwing around with a non wearable version is just a waste of time.
I make eyes that go into mannequins which will never be worn, but you could if you wanted to.
I made one that is in Delorean car headquarters that runs on a power supply. It has stood there for several years now running continuously.
you could undo the head, slap a battery on it and walk away and it will work.
That is the goal, it is not easy to do, but if i did it, im sure your electronics guy can too.