ReviewsFrequency conversion

YVO Optocoupler Isolation Board,4 Channel Optocoupler Isolation Module PLC Signal Level Voltage Conversion Board,Can be Used for Signal Isolation,Signal Level Voltage Conversion (24V to 5V)

【Widely Use】: Our optocoupler isolation board can be used for signal isolation, PLC signal level converting, level conversion between single-chip microcomputer, PLC and other signals, PNP / NPN signal to NPN signal, signal level voltage conversion and other purposes..
【20K Limit Switching Frequency】: The maximum switching frequency of our optocoupler isolation is 20K..
【Easy To Recognise】: Each channel of our optocoupler isolator module has been equipped with indicator, easier to recognise the working status..
【Size Parameters】: Module Dimensions: 72*55*18mm (length*width*height). Mounting Hole Size: 64*47mm. Mounting Hole Diameter: 3mm..
【SHOPPING WITH CONFIDENCE】: We are committed to providing you with quality services. If you have any question, please feel free to contact us by sending emails.We will provide after-sales service until you are satisfied..

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Tecsun H501 Digital Worldband AM/FM Shortwave Longwave Radio with SSB Reception, Dual Speakers, & MP3 Player, Matte Black

【HF VFO /RF Generator 】It has 10kHz to 220MHz working ranges. 0.5PPM high precise Tcxo clock, the frequency is more accurate. Tuning step of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHz..
【VFO for Ham SDR HAM QRP Transceiver】 Used as a local oscillator on Homebrew radio receivers (such as superheterodyne, SDR, direct conversion and Homebrew QRP transceivers) ， a simple RF/clock generator for calibration reference or clock generation，a common 128x64 I2C OLED SSD1306 display and Si5351 module..
【Adjustable】Intermediate frequency (IF) offset (+ or -) is adjustable.The bar graph of the signal meter through the analogs input (ADC).I2C data transmission, only need 2 lines it can be connected to the display, with high stability and accuracy of frequency generation.
【20 Band Presets】Equipped with generator function mode.Initial frequency, end frequency, sweep-frequency-step can be set. 20 band presets (shortcuts) for BCB and HAM frequencies.RX/TX mode selector for Homebrew QRP transceivers..
【 Guarantee】 We providing 100% satisfactory service to every customer to make sure our customer can purchase with confidence. If you have any questions, please contact us, we will reply and improve in time..

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DaToo 500W Aquarium Heater PTC Fast Heating Fish Tank Heater 500 Watt Submersible with LED Digital Temperature Controller for 60 to 120 Gallon, 1 Yr Warranty

...C Aquarium Heater: As we all know, it is not easy to keep large aquariums at a comfortable temperature at all times. So it's very important for aquarium hobbyists with 55 to 125 gallon large tanks to choose a perfect heater. DaToo 500W PTC aquarium heater, high-precision temperature sensing, 3 seconds fast heating, frequency conversion energy saving, sturdy and durable, double safety protection, let your beloved fish always enjoy the happiness brought by the warm water temperature!.
High Precision And Fast Heating System: There are two temperature probes on the top of the DaToo heater, which ensures that the DaToo has a more powerful temperature sensing capability and can easily maintain the temperature accuracy at ±0.5°F. 3 Seconds Fast Heating, DaToo uses PTC semiconductor ceramics as heating elements, which makes DaToo have very low energy loss and can convert 90%~95% of electrical energy into thermal energy, and the water temperature can start to rise within 3 seconds..
Leading Frequency Conversion Energy Saving Technology: Usually high-power heaters consume a lot of electricity, but DaToo not. DaToo 500W Aquarium Heater adopts leading frequency conversion heating technology. When the water temperature is close to the set temperature, the power w....

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MC14046BCP Phase Lock Loop (PLL) IC 1.9MHz 1 16-DIP (0.300\

...gnal-input amplifier and a common comparator input..
Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.

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XTUGA J-3 Professional True Diversity UHF Instrument Microphone Wireless Transmission System for Saxophone Transmitter Receiver 492ft Transmission Range,Plug and Play

Saxophone-specific UHF wireless microphone transmission system. True diversity wireless receiver and transmitter, dual antenna diversity reception. Stable reception without blind zone, high frequency stability, no delay, high-recovery pickup,Frequency rang:550-580Mhz.
With PLL combined technology. 100 channel free choice, infrared frequency function, using secondary frequency conversion circuit design, with sensitivity, multiple squelch control and anti-interference function.
Flexible gooseneck for optimum microphone positioning.No more tripping on cables.The microphone transmitter can be directly clipped to the saxophone and the horn.Experience complete freedom of movement while performing.
High fidelity and long range, signal stability.operating range up to 150 meters (492Ft).The receiver and transmitter are powered by a large capacity rechargeable lithium battery. Working hours are about 5 hours. Comes with a USB cable for convenient recharging.
Equipped with LED display.The LCD display shows you the frequency, microphone volume as well as the battery level. Change the microphone volume from the receiver is easy. The working status is clear at a glance.

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JUNSHUNTONG HF VFO for Ham SDR QRP Transceiver,20K-220MHz RF Generator Superheterodyne Receiver Debugger,Tcxo Clock,S-Meter, 20 Band presets

【HF VFO /RF Generator 】It has 10kHz to 220MHz working ranges. 0.5PPM high precise Tcxo clock, the frequency is more accurate. Tuning step of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1MHz..
【VFO for Ham SDR HAM QRP Transceiver】 Used as a local oscillator on Homebrew radio receivers (such as superheterodyne, SDR, direct conversion and Homebrew QRP transceivers) ， a simple RF/clock generator for calibration reference or clock generation，a common 128x64 I2C OLED SSD1306 display and Si5351 module..
【Adjustable】Intermediate frequency (IF) offset (+ or -) is adjustable.The bar graph of the signal meter through the analogs input (ADC).I2C data transmission, only need 2 lines it can be connected to the display, with high stability and accuracy of frequency generation.
【20 Band Presets】Equipped with generator function mode.Initial frequency, end frequency, sweep-frequency-step can be set. 20 band presets (shortcuts) for BCB and HAM frequencies.RX/TX mode selector for Homebrew QRP transceivers..
【 Guarantee】 We providing 100% satisfactory service to every customer to make sure our customer can purchase with confidence. If you have any questions, please contact us, we will reply and improve in time..

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CHENJIU Wine Cooler Beverage Refrigerator 48 Bottle Beer Soda Cellar Fridge Freestanding Chiller Stainless Steel & Quiet Counter Top Operation Compressor Glass Door/Digital Memory Office/Dorm

✔ 48 bottles capacity: can hold about 48 bottles of different sizes of wine. This is the perfect choice for wine lovers with a wide range of wines..
✔ Circulating moisturizing: The compressor of the constant temperature wine cabinet can keep the humidity of the storage environment at 55~75% rh, simulating the natural wine cellar storage environment..
✔ Negative ion purification system: The airway has a built-in negative ion air net odor system to adsorb and degrade odor molecules. Create a fresh storage environment for your wine..
✔ Intelligent PTC heating compensation: When the room temperature is lower than the set temperature, the electric heating compensation system is activated, and the heating is actively heated to the current set temperature without fear of severe cold..
✔ Dual-mode stepless frequency conversion: Low-power frequency conversion technology allows the wine cabinet to be in low-noise, low-vibration operation for a long time, significantly reducing power consumption and heat generation..

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Differential Amplifiers EL5172ISZ 200MHZ DIF REC (50 pieces)

Power supply EMI filter is a kind of reactance-type low-pass filter, installed at the power supply input of electronic equipment..
It can inhibit noise transmitted through grid power cable, and can inhibit high-frequency interference signals generated by the electronic device itself..
High quality imported components provide obvious filtering effect..
EMI has become a must have device installed in electronic equipment..
Widely used for precision measuring instruments, building automation, precision machinery, elevator lifting equipment, automated system, calculator inverter office equipment, servo system inverter equipment, frequency conversion equipment, lighting equip.

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1pcs/lot Brand CD4HC7046AE 74HC7046 DIP-16 Phase-Locked Loop

...gnal-input amplifier and a common comparator input..
Very low power consumption: 70 µW (typ.) at VCO, VCO inhibit control for ON-OFF keying and ultra-low standby power consumption fo = 10 kHz, VDD = 5 V, Source-follower output of VCO control input (Demod. output), 100% tested for quiescent current at 20 V.
Operating frequency range up to 1.4 MHz (typ.) at VDD = 10 V, RI = 5 k, High VCO linearity: 003c1% (typ.) at VDD = 10 V, 5-V, 10-V, and 15-V parametric ratings.
Low frequency drift: 0.04%/°C (typ.) at VDD = 10 V, Choice of two phase comparators: Exclusive-OR network (I) Edge-controlled memory network with phase-pulse output for lock indication (II), Zener diode to assist supply regulation, Standardized, symmetrical output characteristics, Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices".
A Versatile Building Block for Micropower Digital and Analog Applications, Example Applications: FM demodulator and modulator, Frequency synthesis and multiplication, Frequency discriminator, Data synchronization, Voltage-to-frequency conversion, Tone decoding, FSK - Modems, Signal conditioning,.

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Chiropractic Adjusting Tool, 900N Rechargeable Electric Spine Massager Instrument Professional Massage Gun with 5 Head for Adjust Vertebration Body Massages

...ts of the spine and extremities. Improve joint pain, Adjust vertebration, Delay bone age. Lightweight, safe, durable, portable, superb craftsmanship, suitable for everyone.
【Multi Levels Force Can Be Adjusted】Upgraded smart chip, 5 frequencies, 18 gears adjustable (low frequency, medium frequency, high frequency, over frequency, frequency conversion 50N-900N, each gear increase of 50N). Time saving, energy saving, which is a good replacement to the human forces.
【Easy to Use】Lightweight, safe, durable, portable and sturdy, home massage for everyone. 15 minutes a day can reduce the pressure on the neck, good effect. Can change the head, multi‑purpose, can meet the needs of different people. Equipped with 5 heads to meet different needs. Significant and good effect.
【High Quality Workmanship】Chiropractic adjusting tool humanrize handle design to reduce impact to the hand and arm when performing adjustments. Designed for greater reliabilty and increased durability providing durable use. Display screen, power display. Language switches (Chinese and English).

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Bluetooth FM Transmitter Universal Wireless in-Car Radio Adapter FM Modulator Music Player

Bluetooth V4.1: featuring Bluetooth 4.1 technology, the wireless FM transmitter automatically selects free frequency (range from 87.5 to 108 MHz) without interference while music playing..
Easy to Use: turn on the Bluetooth FM Transmitter, and connect with the radio at the same frequency and then pair your phone/audio player with the modulator via Bluetooth..
Strong Compatibility: the in-car radio adapter works great with most Bluetooth enabled devices, such as iPhone, iPad, iPod, tablet, and android smartphones..
Long Battery Life: features a built-in 700mAh rechargeable battery that supports up to 10-hour continuous playing. You can enjoy your favorite music during trip without any worries..
Friendly Design: portable and easy to charge with a USB port.
support to memorize the last FM transmitting frequency and have hands-free phone conversation for safe driving..

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