Ok, I have been looking for this circuit on line now for a while and I finally found it. (Thank you Kostas 711 in Patras City, Greece. ) Turns out it is a pretty simple circuit. Part of it is a voltage regulator and filter to isolate the voltage supplied by the receiver and using it to power an op-amp which will run the meter. The rest of it isolat
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es the carrier frequency from the satellite, rectifies it, and feeds it to the amp input. The amp output drives the meter. Voila! Now I know why these things are so cheap. The most expensive component is the meter. I saw some other DIYers looking for this online as well so here it is just in case they Google me. I still would like to try to build it myself and use my volt-ohm meter for the display, perhaps without the op-amp. Maybe just a couple of caps, rectifiers, and a choke, Use a couple of RCA jacks for the output to the meter. Voila! I`ve also created my own satellite look angle calculator for Windows. I found the formulas for the elevation, azimuth and skew by looking through some learning material on the subject. They didn`t have the development of the formulas but they had some sample problems. I also found some data regarding magnetic declinations to add in, since I use a compass to do my site surveys. Right now the calculator only does the North American continent and DirecTV and Dish satellites. I am working on an upgrade and would also like to develop it for my Palm phone. The iPhone and Touch would be fun to do too, but I do not have a Mac for development. Perhaps later.
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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