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Notes: The frequency of the transmitter lies within VHF and VLF range on the TV channel, however this circuit has not been tested at UHF frequencies. The modulated sound signal contains 5. 5 -6MHz by tuning C5. Sound modulation is FM and is compatible with....
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To be used with PC connected to video projectors, where the lighting controller may require control of a presentation on the video screen but the PC for the presentation is located in a different location to lighting control. The Hardware required for this....
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The TA1284FN is TV Tuner IC which integrate mixer / Oscillator for VHF and CATV bands, mixer / Oscillator for UHF band, and IF Amplifier on a single chip. Supply voltage of 5 V helps lower power dissipation from the set. Compact 16-pin SSOP makes the Tuner....
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After I built my KN-Q7 kitset 40m QRP single sideband (SSB) transceiver, described elsewhere on this site, I went on to build a matching low power "Z-match" antenna tuner and a sensitive SWR meter. For some reason, I found I needed three hands to tune this....
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Single chip 2.4 GHz Transceiver NRF24L01 is a single chip Radio transceiver for the world wide 2.4 - 2.5 GHz ISM band..
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In the circuit, the adjustable prestage is composed of transistor AF279, and the natural oscillation mixer stage consists of transistor AF280. The power circuit is installed on the board with copper coating. The main coil data:L1, L3, L8, L9: eight turns,....
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This application note includes a brief overview of power amplifier theory and it includes simulation results that provide insight into the operation of the power amplifier on all of MAXIM s LFRF transmitters and transceivers....
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Later, I will use the same pivot table to list the parts out by each of the 8 phases in the build, organizing them into phase-specific bags O` parts. First thing I notice is that there are some slight disconnects between the liberally illustrated, online....
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HS101/HS201 are a pair of tiny radio transceiver components. The working frequency is 280MHz. It is suitable for digital signal transmission. The control distance is 30 ~ 100m. All the components including the antenna are packaged in one. It is easy to use.....
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More examples to connect your transceivers to the computer for SIMPLEX software operations are described in the pc_tx. bmp file that is included in the simplex. zip file...
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This is design circuit for UHF transmitter circuit. The TV transmitter circuit is working on the UHF channel, 470-580 MHz frequency channel 21-34. This transmitter can radiate as far as 30-100 meters by using a cable 10-20 cm. This is the figure of the....
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The circuit uses the long-wave wireless transceiver T630/T631, controlled 6-channel load. The features are low-power, high anti-interference ability and simple structure etc....
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The ADC12038 families are 12-bit plus sign sampling ADC converters with serial I/O. These devices have configurable Analog multiplexers with 2, 4, or 8 input channels. On re- quest, these A/Ds perform a self calibration routine that minimizes linearity,....
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Tube Tester and Filament Burn In Jig - Here`s my answer to cooking the tubes for days and then testing them before inserting them in an amp. Note - I have learned an important lesson with this jig. The filament alone heats the entire bottom of this tube and....
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Turns on mobile transceiver or other mobile equipmentwhen powerisapplied, if external circuit is broken when equipment is stolen. Transmitter will then put unmodulated carrier on air even with PTT switch disconnected or off, for tracing with radio direction....
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This is a complete design circuit for a complete ultrasonic transceiver used in a variety of pulse/echo-ranging applications. Here`s the figure of the circuit; In this circuit, the LM1812 transmits a burst of oscillations with transducer X1. Then, using the....
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The SP1481E SP1485E and SP1490E 1491E series transceivers with SP6652 high efficiency high frequency current mode PWM buck Regulator together allow creating an isolated RS-485 Interface with up to 2kVrms isolation and CAN support up to 15Mbps data rate....
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This is a circuit of 90-125 MHz Crystal which is very useful for VHF/UHF converters. This circuit provide 5 to 15 mW output. High-quality fifth- or seventh-over-tone crystal type can be used in this circuit. Undesired oscillation never reach above 500 MHz....
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This UHF wideband amplifier(Ultra High Frequency amplifier) has a total gain of 10 to 15 dB in the 400 850 MHz domain frequency so it can be used where the tv signal is weak. For this UHF antenna tv amplifier to work correctly you need to cut the components....
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This battery-powered monitor has been designed to provide an audible indication of keying for those whose rigs lack a CW sidetone. Its sensor wire is wrapped around the transceiver`s coax no direct connection is required. Of course Morse isn`t the only use....
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This is a UHF oscillator circuit I designed to make use of the Mini-Circuits POS-400+ voltage controlled oscillator chip. By giving it a voltage from 0 to 12V on pin 8 it gives out a sine wave ranging from 200MHz to 380MHz on pin 2, though my testing with a....
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This is a 5W -150MHz RF amplifier circuit. It applies the MRF123 TMOSFET. The MRF123 is a very high gain FET which potentially unstable at both VHF and UHF frequencies, so the 68 Ohm input loading resistor has been used to enhance the stability. This RF....
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This page will be updated as Material becomes available. This New System will essentially replace the original BCD Design originally designed by WB6IGP and N6IZW and appeared in ARRL UHF/Microwave Project Manual. Their efforts were later revised by WA6CGR.....
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The unit is based on a PHILIPS FM880 link transceiver which was originally supplied to a Telecom Australia specification for telephone applications in remote areas of Australia. The FM880 in turn is part of the family of equipment including the PHILIPS....
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TA1383AFG integrates an NTSC chroma decoder, multi-point scan sync processor (equivalent to pin D4), and H/V frequency Counter in a 30-pin flat package. The IC is ideal for double scan TVs By Toshiba Semiconductor ..
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VCO is definitely useful in so many RF projects, wide band Ghz VCO get more concern than VHF/UHF VCO. here is a Manhattan Island Pad construction for VHF VCO, low to 88Mhz and up to around 300Mhz. Here is the schematic, a Seiler oscillator, Voltage....
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All of ACC`s repeater and remote base products support control of synthesized remote base transceivers. One form of frequency control supported is compatible with transceivers using thumbwheel frequency selection. The controllers supply BCD (binary coded....
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This module uses the highly integrated MAX2830 RF transceiver. It is a complete RF front-end solution that meets the WLAN IEEESM 802.11b/g standard....