This would require a 1200 rpm synchronous motor and a light source, which would be made of a row of LEDs, arranged vertically, and located about 6 inches from the screw. My plan was enclose it in a clear plastic cabinet so all the components would be visible. Later, I had discussions with Darryl Hock about the possibility of making the mirror screw display color images.
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He said that he could make a custom Aurora converter, which would output red, blue and green 60 line video signals. At that point I decided that the display at the museum would be both mono (orange) and in color. The image would display all three colors simultaneously, not sequentially as in the Baird mechanical color system of the 20s. The light source would have a set of LEDs for each primary color: red, blue and green. Video from the Aurora converter would be amplified and used to drive each set of LEDs. With a mono display, a row of 3 mm diameter red LEDs can be stacked on top of each other, with a diffusing material in front to make the light more uniform. Since the screw we have is 4. 75 inches wide, the 3 mm width of the LEDs would result in a horizontal resolution of about 40 lines (4. 75 inches = 121 mm. 121/3 = 40). However, the LED row can be masked to make a slot about 1 1/2 mm wide, which would result in about 80 lines of resolution. If 3 mm LEDs were used, stacked vertically with alternating red, blue and green LEDs, it would be very difficult to use a diffusing material to even out the color (red LEDs would be 9mm apart, etc. ). The solution I have chosen is to use larger, 5 mm LEDs located on a separate chassis, with. 75 mm diameter fiber optic cables going from the top of each LED to the light source box, where the fiber optic cables will be stacked vertically, alternating red, blue and green. The height...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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