The Skeyeball project is an ongoing project in the Indiana University System Design Methods Laboratory for both graduate and undergraduate students to perform embedded system design and implement various projects. The downlink portion of the project involves transfering data from the plane to the ground by using a single signal. My downlink p
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roject involves re-implementing Prashant Patel`s project from thesummer of 2000, then compacting and debugging it to achieve the desired operation. The first step is to implement the xilinx code using two Logic Engine Boards to host the plane and ground implementation seperately so that adequate testing with the RF transmitter and receiver can be accomplished. I also re-implemented the analog injection and extraction ciruits with new designs to increase bandwidth. A NTSC signal is generated by the video source and it`s horizontal and vertical synchronizing pulses allow data to be injected at spaces in the signal where the video signal is retracing to the top of the screen and is always black. The data can be injected in these spots and then extracted from the same spot by the same manner. Once the data is extracted, the video signal is set back to black so that there are no side effects in the video image displayed on the monitor. There are 10 of these spaces in each field and a maximum bandwidth of 300 bits per space. The present goal is an established 56kbps downlink, which is around 90 bits per space. The limitation to higher bps is the bandwidth the RF transmitter, receiver and the analog circuitry allows. Maximum bps is determined experimentally. The data is viewed using hyperterminal, so a lower rate is better. Once further parts of the system are operating we can increase the download capabilities. The physical part...
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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