Supreem Circuits Diagram and Projects: RF

Simple RF Transmitter for PIR Sensors Circuit Diagram

RF 03:52

Simple RF Transmitter for PIR Sensors Circuit Diagram

This is the Simple RF Transmitter for PIR Sensors Circuit Diagram.

Atv Jr Transmitter 440Mhz Circuit Diagram

RF 04:27

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This low-power video transmitter is useful for R/C applications, surveillance, or amateur radio applications. Seven transistors are used in a crystal oscillator-multiplier RF power amplifier chain, and a high-level video modulator. A 9- to 14-Vdc supply is required. Output is 0.4 to 1.2 W, depending on supply voltage. </div>
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<b>Atv Jr Transmitter 440Mhz Circuit Diagram</b><br />
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Atv Jr Transmitter 440Mhz Circuit Diagram

This low-power video transmitter is useful for R/C applications, surveillance, or amateur radio applications. Seven transistors are used i...

2MHz Square Wave generator Circuit Diagram

RF 22:16

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With the values shown the circuit generates a 2-MHz symmetrical square wave. Changing capacitors Cl and C2 to 0.01 ÂµÂ¥ results in a frequency of 500 Hz. For the particular integrated circuits and power supply voltages (5.0 V), the reliable operating range of Rl = R2 is 2 k ohm to 4 k ohm. </div>
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<b>2MHz Square Wave generator Circuit Diagram</b></div>
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2MHz Square Wave generator Circuit Diagram

With the values shown the circuit generates a 2-MHz symmetrical square wave. Changing capacitors Cl and C2 to 0.01 ÂµÂ¥ results in a frequ...

Super linear FM Circuit Diagram

RF 02:05

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Designing various electronic circuit system (synthesizer, modem,  decoder, data converter, etc) of ten need a frequency modulator  subsystem. An FM modulator is very easy to build with TC9400 since the  it has very good linearity as V/F converter. While Vin determines the amount of modulation (FM deviation) around the   center frequency, the potentiometer determines the center frequency.  Vin  can be negative as well as positive.<br />
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<b>Superlinear FM Circuit Diagram</b><br />
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Super linear FM Circuit Diagram

Designing various electronic circuit system (synthesizer, modem, decoder, data converter, etc) of ten need a frequency modulator subsyste...

Build a 9V Wireless Microphone FM Transmitter

RF 03:53

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This FM transmitter circuit can be used as a wireless microphone,  can  be received by an ordinary 88- to 108-MHz FM broadcast receiver. For the  power supply, this transmitter circuit is powered by a 9 V battery. To  comply with the radiation limit of FCC rules, keep the antenna length  under 12 inches. L1 is 6 turns of #24 wire wound around a pencil or a  1/4″ form, with turns spacing of 1 wire diameter. C6 is a gimmick  capacitor which has value about 1 pF.. <a href="http://www.circuitsproject.com/" target="_blank">Link</a></div>
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 9V Wireless Microphone FM Transmitter Circuit Diagram</div>
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Build a 9V Wireless Microphone FM Transmitter

This FM transmitter circuit can be used as a wireless microphone, can be received by an ordinary 88- to 108-MHz FM broadcast receiver. F...

RF detector circuit for High Frequency

RF 23:48

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Often we need to see which is ideal for the placement of an antenna, a transmitter or other device for high frequency where its signal can reach and where it leaves point. For this we can use a detector circuit, also called the sniffer, which is tuned to the operating frequency of the desired system. This detector is described in this article is very simple to operate and do, just uses two diodes and two transistors and a half dozen passive components, their frequency of detection is around 2.2Ghz and its sensitivity is pretty good.<br />
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RF detector circuit for High Frequency</h3>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioY8XKkG7k1Pd2B1Sma_mEbx5csai6hgOhV0f1ukHrHjIpHZGXYXa5oYGS2n-mw3n13MUCrFTGja8GEMXucHSzGxWJjdbBZprbYw4BdGrAFTDHXKaDi5RYGvbCKgiNsorAJ9L5anHIETPb/s1600/RF+detector+circuit+for+High+Frequency.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="RF detector circuit for High Frequency" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioY8XKkG7k1Pd2B1Sma_mEbx5csai6hgOhV0f1ukHrHjIpHZGXYXa5oYGS2n-mw3n13MUCrFTGja8GEMXucHSzGxWJjdbBZprbYw4BdGrAFTDHXKaDi5RYGvbCKgiNsorAJ9L5anHIETPb/s1600/RF+detector+circuit+for+High+Frequency.jpg" title="RF detector circuit for High Frequency" /></a></div>
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Its operation is simple, the transistors Q1 and Q2 are BFS17 are being used with RF amplifiers. LED1 can be replaced by a VU to have greater precision in signal check. The circuit has a very broad frequency tuned, it will capture RF signals from microwaves, cell phones, WIFI, etc.. I believe that the transistor can be replaced by BFS17 BRF92 or BFG591, which are easier to find here.<br />
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Detector RF High Frequency</h3>
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The circuit must be mounted in a metal box to minimize capacitive effects of hand and other external interference, only the antenna must be out of caixa.Para test the detector, as you approach a signal source, the 1 LED gets brighter. The simplicity of the circuit, for sure it will capture unwanted signals, especially harmonics powerful transmitters, but is still reliable equipment.</div>
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RF detector circuit for High Frequency

Often we need to see which is ideal for the placement of an antenna, a transmitter or other device for high frequency where its signal can...

Use LA1800 Portable AM and FM Radio

RF 10:09

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This portable AM and FM radio circuit is designed using the LA1800 IC  and some other external components. As you can see in this circuit  diagram the LA1800 manufactured by Sanyo Semiconductors , require few  additional components. The LA1800 am FM portable radio circuit needs to  be powered from a 3 volt DC power supply circuit.</div>
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You can use an 3 volt battery. This radio receiver circuit has a low  current dissipation of 5.6mA for FM band and 3.2mA for AM band .Also the  output signal is driven into earphone speakers , but you can use an  additional speaker ( in that case you need to connect an additional  small power audio amplifier). </div>
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Use LA1800 Portable AM and FM Radio

This portable AM and FM radio circuit is designed using the LA1800 IC and some other external components. As you can see in this circuit ...

Satellite Dish and Antenna location on one cable

RF 23:05

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<b>With a very long and difficult to pronounce name, Diplexer Satellite Combiner & Splitter is a marvel of electronics, it is a divider and mix of RF combining satellite antenna + DC + local terrestrial antenna digital (VHF UHF HDTV CATV TV ) on a single cable without interference or other problems. The Diplexer Combiner, as it is called, has two entrances, one to the antenna ANT Local VHF and UHF, another SAT for antenna TV, and I / O output with the two mixed signals.</b><br />
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Satellite Dish Antenna and common in one cable</h3>
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The name comes from Diplexer Duplex , which means double , equivalent to twice or that replicates the service, which operates in two modes or two systems or a communication system consisting of two points that communicate with each other in both directions , at our case are RF signals that are mixed and then separated . This mixer is the lifeline for small spaces , long distances or where the wiring will not support another cable . You can use the same coaxial cable already installed to pass the RF antenna of the local terrestrial and satellite signal + DC together.<br />
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Using diplexers (two crossovers ) the main benefit is to use only one coaxial cable, so a reduction of spending on materials and workmanship . The Diplexer Combiner supports a satellite dish , or an LNBF to Receiver C Band or Ku band. It is capable of supporting systems FTA ( Free to Air) as well as C-band KU band , Digital receiver , Analog Receiver , cable TV operators DirecTV , Sky , Via Embratel , Hi , Vivo , Telefonica , among others .<br />
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There are hundreds of manufacturers Diplexer but little difference in the electronic issue between him , is more on the mechanics they differ . Most have an antenna input ( ANT ) which can be VHF - UHF - HDTV - CATV , which has a frequency range of 5 MHz to 850 MHz , since the input to satellite dish ( SAT ) has a frequency range of 950 MHz to 2400 MHz ( varies from manufacturer ) . The maximum DC current passing is 500 mA , the loss of RF signal from the satellite avg 3 dB and the impedance is 75 Ohms .<br />
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How to Install Satellite TV Diplexer<br />
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The installation and operation of the Diplexer Sat TV is quite simple, you should always use two antennas Diplexer one along to mix the signals of the satellite dish antenna and common, and another near the TV and satellite receiver to separate the RF signals. It supports other components in the antenna, including the keys to high frequency multipoint LNBF and mixers VHF and UHF signal Places antennae system.<br />
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It is advisable to protect the Diplexer time, especially rain, although toasted and weatherproof, a small water infiltration can cause damage and losses in the RF signal. When installing crossovers let the satellite receiver off. This system is compatible with all satellite receivers analog and digital KU and C band<br />
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See this installation manual for Diplexer one of the manufacturers in <a href="http://manuals.solidsignal.com/www-solidsignal-com_SPTDX31%20TECH.PDF" rel="nofollow" target="_blank">PDF</a><br />
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Even the Azbox, Elsys, TP-LINK, Tocomsat, Cromus, Duosat, Naza Box, Hicom, azamerica, Telesystem, IZ receptors: boz, Century Midiabox, Bedinsat, etc.</div>
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Satellite Dish and Antenna location on one cable

With a very long and difficult to pronounce name, Diplexer Satellite Combiner & Splitter is a marvel of electronics, it is a divide...

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