This is the complete design for a microprocessor-controlled, environmentally sealed 8` video turret with two cameras, remote or autofocus, zoom control, sun damage protection, 450-degree azimuth rotation, 9-speed scan and point capability, multidrop network connection, and extensive expandability. Included here are detailed photos, compl
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ete schematics, FORTH listings for the multitasking controller based on a low-cost embedded 68HC11 system, sources for hard-to-find parts, a detailed theory of operation, and comments on interfacing. The video turret began as so many projects do - yet another one of those irrepressible wild ideas that takes on a life of its own. Somewhere in the early days of this project, it occurred to me that it might be nice to have a video camera on board. I hadn`t had much luck using a hand-held camcorder in a sealed enclosure underway (too much hassle when things get interesting), so maybe we should mount one on deck somewhere. But which way should it point Hmmm. OK, so we`ll motorize it. Of course, it has to be sealed to handle the harsh environment. and hey, this would be great for the security system if it could see in low light. OK, so we`ll use two cameras, one color, one ultra low light B&W. Either should be able to point at any angle under software control, and scan between any pair of angles as well. at variable speed, of course. And, since the sun tends to damage things, it should be thermally protected, monitored for overheating, and provided with some sort of automatic shutter to protect the color CCD. Hey, while we`re at it, why not add a little laser, just for kicks Once begun, ideas like that tend to become design specifications, and that`s pretty much what happened. At the time, we were working in a lab at the...
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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