The TV transmitter we present today generates a stream containing four TV programs and broadcasts it on a frequency in the DTT standard. Ideal for stacking in an antenna system, audiovisual channels generated on-site or from other sources like a decoder for satellite television. With this project you can make a small local TV station that has up
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to four TV channels. You can also integrate into a system into other existing TV signals that will be transmited on a desired RF channel. It`s ideal for exclusive cable installations for a condominium, a hotel, company premises or public place. The transmitter is a modulator that converts up to four audio-visual content (with stereo hi-fi) in a stream for DTT digital terrestrial broadcast on a television RF channel. This channel is called multiplexer or transponder in DTT: is an old analog TV channel that now contains a number of digital television channels. The product that we have realized merges 1 to 4 television channels in one stream of output that is ready to be transmitted on air (with the help of a linear RF) or injected in a localized cable TV circuit. The stream is transported by a frequency corresponding to an RF TV channel. It has a width of 7 MHz if we operate in the VHF high band (III) or 8 MHz if broadcast in UHF (channels 21 to 69, that band IV and V ). Our device operates on all TV bands, given that the power is sufficient to drive the input stage of TV receivers, decoders, etc. By entering into the video inputs the signals provided by few decoders or other sources (the audio is managed trhouhg to corresponding inputs) we will create a TV channel. This channelis then then mixed with the signal coming from the antenna. In this way we`ll have all the signals available in a single place without even the need...
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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