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$3.50 Shipping Condition: New Location: China If the main power failure, the device can continue to provide accurate timing and temperature, performance is not affected. Clock chip: high-precision ... moreclock chip DS3231. Arduino Module. The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format.
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$2.55 Shipping Condition: Neu Location: China AD9833 DDS Signal Generator(Green). 1PCS AD9833 DDS Signal Generator Module. AD9833 Signal Generator(Purple). AD9833 DDS Signal Generator(Blue). Linear ... moreloss, linear decay. Scan clock generator. Digitally programmable frequency and phase.
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$2.99 Shipping Condition: New Location: China The clock frequency of AD9850 is up to 125MHz, and the clock frequency of AD9851 is up to 180MHz (30MHz 6). The highest output frequency AD9851 is higher ... morethan AD9850. AD9850 module uses 125MHz active crystal, AD9851 module uses 30MHZ active crystal.
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$2.55 Shipping Condition: Neu Location: China Via three serial interfaces to write data. 1PCS AD9833 DDS Signal Generator Module. Linear loss, linear decay. Scan clock generator. Module Features support ... moreuniversal plate (tunnel plate), a multiple-board pins are 2.54mm, can be easily welded universal board.
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$5.73 Shipping Condition: New Location: China LED String. Gyro/Hand Spinner. Arduino Module. Motor Drive Module. USB Module. Magic Cube. Clock Module. Signal Generator/Transmitter.
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$3.59 Shipping Condition: New Location: China AD9850 DDS Signal Generator Module. Description Packing List：2Pcs AD9850 DDS Signal Generator Module Payment 1.We accept Paypal only. 2.Please confirm ... moreyour ebay shipping address is exact a fter payment. 3.If your purchased is more than £30.00. Please offer your phone number with shipping address. Delivery details 1.All items will be shipped by Airmail post within 1 business days. It takes approximately 15-25 days(USA.CA,AU,UK,DE) Other country 15-35 days. 2.Express by EMS. It must add 20 GBP shipping fee, it takes 5-10 workdays for delivery. If you need other Express(DHL,Fedex.UPS etc. please contact us to talk about shipping fee. 3.Once you purchase. Please DONOT leave negative, neutral feedback or open any case if you have not received item in 30 days, because we have mentioned the shipping time repeatedly. Contact us 新建网页 2 1.We offer retail and wholesale services. We can provide products in accordance with your requirements. If you have any questions or something to consult. Please send us ebay message. 2.All messages will be answered within 1 business day. If you do not receive our reply. Please kindly re-sent your message and we will reply to you as soon as possible. 3.Our aim is to provide Top Level Customer Service. Business hours are 9am to 6pm Beijing time(+8 GMT) Monday to Friday. Engineered for professional eBay sellers！ On 14-Jun-14 at 10:01:01 BST. Seller added the following information:
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Free Shipping Condition: New Location: China NE555 Pulse Frequency Duty Cycle Square. Model Number. Dissipation Power.
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$2.79 Shipping Condition: Neu Location: China 1 x XR2206 Function Signal Generator DIY Kits Sine Triangle Square Output 1HZ-1MHZ. Frequency: 1Hz - 1MHz. Flatness: +0.05dB 1Hz - 100kHz. Waveforms: ... moreSquare, Sine & Triangle. TRIANGLE WAVE. OLED LED&RGB.
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$3.20 Shipping Condition: Neu Location: China The new "Forty-9er" kit has the following characteristics 3, when the vibration frequency of the kit launch fixed 7.023MHz, when receiving the vibration ... morefrequency is 7.023-7.026MHz. PCB size is 6cm 6cm.
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Free Shipping Condition: New Location: La Vista, United States SquareTrade © AP6.0 The key features Output wave-form such as sine. Square, rectangle, sawtooth and triangle waves. frequency and amplitude can be ... moreadjusted. 4 or 5 digit LED display. Range from 0.2Hz to 2MHz. stability and low cost. Convenient and safe to operate General Specifications Power supply: 110V/220V 50Hz/60Hz Size: 270mm x 215mm x 100mm Weight: 5 lbs Working temperature: 0ºC ~ 40ºC Technical Specifications Frequency range: 0.2Hz ~ 2MHz. Seven ranges: 0.2Hz ~ 2Hz. 2Hz ~ 20Hz, 20Hz ~ 200Hz, 200Hz ~ 2KHz, 2KHz ~ 20KHz, 20KHz ~ 200KHz, 200KHz ~ 2MHz. Output signal wave form: sine. Square, rectangle, sawtooth and triangle waves. Output signal amplitude(peak-peak value) Non-attenuate(1Vp-p ~ 10Vp-p) À 20% continuously adjustable. Attenuate 20dB(0.2Vp-p ~ 2Vp-p) À 20% continuously adjustable. Attenuate 40dB(20mVp-p ~ 200mVp-p) À 20% continuously adjustable. Function output symmetry adjust scope: 20% ~ 80% Sine wave distortion: less than 2% Triangle wave linear: more than 99% Square wave rise edge times: less than 100ns. Square wave fall edge times: less than 100ns. Square wave rise and fall pulse: less than 5%Vo. Measurement error: less than 0.5% Packing List: VC2002. Power Plug, Test Probe. WE WILL SHIP YOUR ORDER THE SAME OR NEXT BUSINESS DAY. CUSTOMER SATISFACTION BEFORE. DURING OR AFTER SALES IS CORPORATE PHILOSOPHY. WE APPRECIATE YOUR BUSINESS AND GOOD FEEDBACK AND WILL LEAVE YOU POSITIVE FEEDBACK UPON RECEIPT OF PAYMENT. Sincerely, Brian Liu. LIU& DB ENTERPRISES. INC. ELECTRONICS& TESTING MEASUREMENT DIVISION. 7009 S 107th St. Lavista NE 68128. TEL: 800-370-2197 ext 11 FAX: 402-991-8889. We are a member of
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Free Shipping Condition: New – Open box Location: Windber, United States Up for sale are Exar waveform generators P/N: XR-8038ACP. This Buy It Now is for 1 IC. 0.001Hz - 200KHz. Waveform Generator IC. 14 Pin / 14-PDIP. D/C: ... more0539 Manufacturer data sheet is available here:Data Sheet.
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$2.83 Shipping Condition: New Location: China
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$3.00 Shipping Condition: New Location: China AD9834 provides a phase modulation and frequency modulation function. Similarly, when the clock rate is 1 MHz, AD9834 can achieve a resolution of 0.004Hz. ... more1Pcs AD9834 DDS Signal Generator Module Sine / Triangle Wave Generator module Board Signal Sources generator Hot Sale Wholesale.
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$2.99 Shipping Condition: New Location: China Module model: ADF4351. In addition, with 1/2/4/8/16/32/64 crossover circuits, users can generate RF output frequencies as low as 35 MHz. A: ADF4351 is ... morea digital phase-locked loop. The frequency output below 2.2G is divided frequency output, the output waveform is similar to square wave, if you need a sine wave, you need an external filter.
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$3.50 Shipping Condition: New Location: China 4.X.X.X (decimal point in ten bits and 100 bits): the smallest unit is 1Khz; and the range is 1KHz~150KHz. E.g. frequency display: 100 indicates PWM output ... more100Hz pulse;1.01 represents the pulse of PWM output 1.01K.54.1 represents the pulse of PWM output 54.1KHz.1.2.4 indicates the pulse of PWM output 124KHz.
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$4.60 Shipping Condition: New Location: Lewis, United States TC4421A MOSFET / IGBT 10A Gate Driver, Inverting. INVERTING Gate driver for power MOSFETs + IGBTs. It will both source and sink current from MOSFET gates ... moreto provide fast switching. 10A peak drive current.
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$3.00 Shipping Condition: New Location: China This product is Schumann 7.83HZ very low frequency generator, features high accuracy and stability. 1 x Pulse Generator. Output 7.83HZ pulse square, whose ... moreduty cycle is 50%. Frequency can be fine-tuned for correction.
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$3.00 Shipping Condition: New Location: China Item Description Features: Size: 31mm* 22mm; Main chip: NE555; Input Voltage: 5V-15VDC. when power supply is 5V. The output current can be 15MA around;when ... more12V power supply, the output current can 35MA around; Input current: =100MA Output amplitude: 4.2V V-PP to 11.4V V-PP. Different input voltage. The output amplitude will be different) Maximum output current: =15MA(5V power supply. V-PP greater than 50% =35MA(12V power supply. V-PP greater than 50% Output with LED indication(low level.LED will on; high level,LED will off;low frequency, the LED flashes) The output requency range is selectable: LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz The output duty cycle can fine-tune;duty cycle and frequency is not separately adjustable;adjusting the duty cycle will change the frequency; The output frequency is adjustable: Period T = 0.7(RA +2 RB) C RA. RB is 0-10K adjustable; Low profile when C = 0.001UF; IF stalls C = 0.1UF; High-frequency file C = 1UF; HF stalls C = 100UF; so buyers can calculate the frequency of the waveform. Application: As a square wave signal generator.Generates a square wave signal used for experimental development. Used to drive a stepper motor for generating a square wave drive signal. Generate adjustable pulse for MCU. Generate adjustable pulse.To control circuitry associated. Package including: 1pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Shipping Policy The default shipping is by China Post air mail/Hongkong air mail. Item will be shipped within 2-3 working days after full payment is received. The delivery to most of the countries will take 2-4 weeks. If there's no problem when pass through the customs. It will take about 30 days or more to some places like South America.India,Mexico and Africa. We only ship to the approved address given in PayPal payment. Please make sure payment address in PayPal is correct. Any non-received items caused by invalid address registered on PayPal are not
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$2.79 Shipping Condition: Neu Location: China The AD9833 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. The output frequency and phase ... moreare software programmable, allowing easy tuning.
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Free Shipping Condition: Used Location: Euclid, United States Radio Shack. SECOND PRINTING - 1974. integrated circuits (ICs). The IC will never replace the. CHAPTER 5 DIGITAL COUNTING CIRCUIT. FIRST EDITION. If you've ... morebuilt a few transistor circuits and are anxious to.
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$3.00 Shipping Condition: New Location: China Q1: What is GNSS?. What is GNSSDO?. Use GNSS timing to adjust clocks to make clocks more accurate. Q3: Where is the GNSSDO applied?. Without antenna, ... morethe GNSSDO is used as an OCXO with keeping performance.
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$3.86 Shipping Condition: Neu Location: China Waveform, frequency and power can be set (default is fixed). Schumann wave is a kind of natural energy, it is inexhaustible, inexhaustible. Anyone who ... morecan easily resonate with Schumann waves can obtain energy, and is naturally full of energy and health.
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$3.20 Shipping Condition: Neu Location: China The second signal generator consists of CD4060 and CD4013, which generates a square wave signal with a frequency of 1HZ. CD4060 is a 14-level binary frequency ... moredivider/oscillator. It consists of a 32768HZ oscillator with external resistors R44, R43, C1, C2 and Y1.
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$3.00 Shipping Condition: New Location: China 35M-4.4G RF Signal Generator PLL Sweep Frequency Generator ADF4351 with Touch Screen + USB Cable. - Output Frequency Range: ADF4351: 35M-4.4G. - Default ... more±50ppm 25M imported active crystal oscillator.
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Free Shipping Condition: New Location: United States The reset signal is also used as the counting signal of the sub-counter, and the sub-counter will be increased by 1 for every full 60 seconds. When the ... morecounter is full 24, the Q0-Q3 of the ten bits will be 0010 and that of the individual bits will be 0100, which will be connected to the counter after Q2 is done with the algorithm, so that the counter can be reset from 6 to 0 in advance.
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$1.99 Shipping Condition: New Location: China Output power: 80W. The heatsinks can ensure good heat dissipation, need not consider the insulation and heat dissipation problems. The whole electrolysis ... moreusing imported patch, low resistance, high frequency capacitor, make the ripple down to the freezing point.
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Free Shipping Condition: New Location: United States 1 x Fully Welded Assembled Digital Oscilloscope. High Quality 2 Drum Microphone Mic Clamp Clip Holder Mount for Shure SM58 SM57. Trigger position: Center ... moreof buffer. 20Pin TPM 2.0 Module For SuperMicro AOM-TPM-9665V AOM-TPM-9665H TCG 2.0.
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$3.00 Shipping Condition: New Location: China AD9834 provides a phase modulation and frequency modulation function. Similarly, when the clock rate is 1 MHz, AD9834 can achieve a resolution of 0.004Hz. ... more1Pcs AD9834 DDS Signal Generator Module Sine / Triangle Wave Generator module Board Signal Sources generator Hot Sale Wholesale.
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$3.59 Shipping Condition: New Location: China Arduino Module. Motor Drive Module. Signal Generator. Magic Cube. Voice Module. Car Alarm & Security. Steam brush. Makeup brush.
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$2.55 Shipping Condition: Neu Location: China AD9834 provides a phase modulation and frequency modulation function. Similarly, when the clock rate is 1 MHz, AD9834 can achieve a resolution of 0.004Hz. ... more1Pcs AD9834 DDS Signal Generator Module Sine / Triangle Wave Generator module Board Signal Sources generator Hot Sale Wholesale.
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$2.88 Shipping Condition: New Location: China This product is Schumann 7.83HZ very low frequency generator, features high accuracy and stability. 1 x Pulse Generator. Output 7.83HZ pulse square, whose ... moreduty cycle is 50%. Frequency can be fine-tuned for correction.
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Free Shipping Condition: New Location: New Berlin, United States Made by Baldor USA. The Smart-Boost™ is a new breed of Digital Rotary Phase Converters. Our Smart-Boost technology aids in the startup of motors external ... moreof the phase converter downstream. Which in turn, surges 600% more current to the motors during their startup.
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$3.20 Shipping Condition: Neu Location: China 1 x DIY Digital Oscilloscope Kit. Coupling modes: DC / AC / GND. Circuit is simple and the kit is inexpensive. Observable previous trigger waveform (negative ... moredelay). hope you could understand. Adjustable trigger level position, and with instructions.
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$3.00 Shipping Condition: New Location: China This product is Schumann 7.83HZ very low frequency generator, features high accuracy and stability. 1 x Pulse Generator. Output 7.83HZ pulse square, whose ... moreduty cycle is 50%. Frequency can be fine-tuned for correction.
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Free Shipping Condition: New Location: China Amplitude: 0-3V at 9V DC input. Amplitude: 8V (no-load) at 9V DC input. Impedance: 600 ohms+10%. Triangular wave Square wave Distortion: less than 1%.
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$3.74 Shipping Condition: Neu Location: China Main chip: NE555;. Output with LED indication (low level ,LED will on; high level, LED will off; low frequency, the LED flashes);.
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$2.79 Shipping Condition: Neu Location: China 1 x DIY DSO FNIRSI-150 Digital Oscilloscope Kit. Nano Sheild. OLED LED&RGB. Am 14.03.22 hat der Verkäufer die folgenden Angaben hinzugefügt hope you could ... moreunderstand. Circuit is simple and the kit is inexpensive.
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$3.75 Shipping Condition: Neu Location: China Color Ring Resistor. Adjustable Resistor. Electrolytic Capacitor. Ceramic Capacitor. Monolithic Capacitor. Product Introduction.
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$2.99 Shipping Condition: New Location: China AD9854 DDS module. The AD9854 digital frequency synthesizer is a highly integrated device that uses advanced DDS technology and built-in two high-speed, ... morehigh-performance quadrature DACs to form a digitally programmable 1 and Q frequency synthesizer.
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Free Shipping Condition: New Location: Jonestown, United States Local pick up is not available. We do not accept P.O. BOXES. Photos are greatly appreciated! If your item appears defective, a call to the manufacturer ... moremay solve your issue.
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$2.55 Shipping Condition: Neu Location: China DDS signals: sine wave, square wave, sawtooth, reverse sawtooth, triangle wave, the ECG wave and noise wave. DDS frequency range: 1HZ-65534Hz. Rev Sawtooth ... more= reverse sawtooth. SawTooth = sawtooth. Triangle = triangle wave.
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$16.40 Shipping Condition: New Location: Kelseyville, United States The lower line is the peak value. There are two values displayed, the top line is the present value that is updated twice per second. The top line has ... morethe label: “s/s” and then a number. The cable between the sensor and the display unit is 100 feet long, and is included.
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$2.79 Shipping Condition: Neu Location: China Output 7.83HZ pulse square wave duty cycle 50%, frequency can be fine-tuned correction. Schumann wave electromagnetic wave is very low frequency, can ... morepenetrate any material, is non-free radiation. And each person is a weak potential network, by the Schumann wave excitation, it will produce frequency resonance, the strength of its resonance and the internal structure of the electrical network (human body).
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$3.73 Shipping Condition: New Location: China The second signal generator consists of CD4060 and CD4013, which generates a square wave signal with a frequency of 1HZ. CD4060 is a 14-level binary frequency ... moredivider/oscillator. It consists of a 32768HZ oscillator with external resistors R44, R43, C1, C2 and Y1.
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Condition: Used Location: Morgantown, United States Another feature this unit has is the "bypass" which uses a grid connection to switch to if there is an issue with the battery circuit. In order to be ... morepower-plant grade these cabinets are seismic rated and have a usable life of 40 years.
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Free Shipping Condition: New Location: United States 1 x Fully Welded Assembled Digital Oscilloscope. Trigger position: Center of buffer. With 1KHz / 3.3V square wave test signal source. The trigger level ... moreposition is adjustable. Accuracy: 12 bits. 1 x Alligator clip.
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$2.79 Shipping Condition: Neu Location: China Output 7.83HZ pulse square wave duty cycle 50%, frequency can be fine-tuned correction. Schumann wave electromagnetic wave is very low frequency, can ... morepenetrate any material, is non-free radiation. And each person is a weak potential network, by the Schumann wave excitation, it will produce frequency resonance, the strength of its resonance and the internal structure of the electrical network (human body).
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Free Shipping Condition: Neu Location: China It is also equipped with a multi-function signal generator (10KHz). Frequency: 0~10KHz. Oscilloscope specifications. 1 x Oscilloscope. Waveforms: sine ... morewave, rectangular wave, sawtooth wave, half wave, full wave, positive step wave, anti-step wave, noise wave, exponential rise, exponential fall, DC signals, multi-audio, Sink pulse, Lorentz wave.
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$2.55 Shipping Condition: Neu Location: China Output 7.83HZ pulse square, whose duty cycle is 50%. Frequency can be fine-tuned for correction. This product is Schumann 7.83HZ very low frequency generator, ... morefeatures high accuracy and stability. Pulse square :7.83HZ.
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$3.88 Shipping Condition: New Location: China Industry: CNC machine Product Structure: hand/ hand Outside diameter(mm) 60 Aperture/ Diameter(mm) 0 Resolution(CPR) 100 Operating voltage: 5V Output ... morecircuit: voltage output, long drive package: 1x Hand Wheel Manual Pulse Encoder Generator CNC Lathe
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$3.59 Shipping Condition: New Location: China AD9850 DDS Signal Generator Module 0-40MHz 2 Sine Wave And 2 Square Wave Output Description AD9850: 0-40MHz. 2 sine wave and 2 square wave output. After ... morethe 20-30MHz frequency harmonics increases. The waveform will be less and less clean. Square Wave: 0-1MHz. Low-pass filter with 70MHz. So the waveform better than SN. Parallel and serial data input can be selected via a jumper. DA produced the benchmark pin(PIN12) leads for easy adjustment to do the magnitude of the output waveform Application. Comparator reference input voltage generated by the variable resistor. The resistor can be adjusted duty cycle square wave of different. Active AD9850 125MHz crystal oscillator modules. Dimension:4.5cm x 2.6cm, Package Includes: 1 X AD9850 DDS Signal Generator Module 0-40MHz Test Equipment, Payment Policy 1. We Do Accept Paypal only. 2. eCheque will be held until cleared. 3. Great appreciate for prompt payment. Unpaid item will be filed without receiving payment in 7 days after listing ended. Shipping&Handing 1. All items will be shipped to buyer's ebay address. Before you pay. Please make sure your address in ebay matches the address you would like us to ship to. 2. We ship within 2 business days(weekends and public holidays are not cognized as business days) after full payment is received and cleared. Generally. Delivery time is 2-4 weeks. Other countries or remote areas may take longer. 3. As there are weight and cubage restrictions on international order. We are unable to offer you any discount or combined shipping for multiple items. All items are shipped separately. There is no local pickup service. No third party shipping carrier will be used. 4. Import duties. Taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. Return Policy 1. We are committed to give you the best customer service possible. If for any reason yo
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$2.99 Shipping Condition: New Location: China AD9850 DDS Signal Generator Module 0-40MHz 2 Sine Wave And 2 Square Wave Output Description AD9850: 0-40MHz. 2 sine wave and 2 square wave output. After ... morethe 20-30MHz frequency harmonics increases. The waveform will be less and less clean. Square Wave: 0-1MHz. Low-pass filter with 70MHz. So the waveform better than SN. Parallel and serial data input can be selected via a jumper. DA produced the benchmark pin(PIN12) leads for easy adjustment to do the magnitude of the output waveform Application. Comparator reference input voltage generated by the variable resistor. The resistor can be adjusted duty cycle square wave of different. Active AD9850 125MHz crystal oscillator modules. Dimension:4.5cm x 2.6cm, Package Includes: 1 X AD9850 DDS Signal Generator Module 0-40MHz Test Equipment, Payment Policy 1. We Do Accept Paypal only. 2. eCheque will be held until cleared. 3. Great appreciate for prompt payment. Unpaid item will be filed without receiving payment in 7 days after listing ended. Shipping&Handing 1. All items will be shipped to buyer's ebay address. Before you pay. Please make sure your address in ebay matches the address you would like us to ship to. 2. We ship within 2 business days(weekends and public holidays are not cognized as business days) after full payment is received and cleared. Generally. Delivery time is 2-4 weeks. Other countries or remote areas may take longer. 3. As there are weight and cubage restrictions on international order. We are unable to offer you any discount or combined shipping for multiple items. All items are shipped separately. There is no local pickup service. No third party shipping carrier will be used. 4. Import duties. Taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. Return Policy 1. We are committed to give you the best customer service possible. If for any reason yo
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$2.79 Shipping Condition: Neu Location: China Output 7.83HZ pulse square wave duty cycle 50%, frequency can be fine-tuned correction. Schumann wave electromagnetic wave is very low frequency, can ... morepenetrate any material, is non-free radiation. And each person is a weak potential network, by the Schumann wave excitation, it will produce frequency resonance, the strength of its resonance and the internal structure of the electrical network (human body).
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$4.00 Shipping Condition: New Location: China Module model: AD9834. The AD9834 is a 75MHz, low-power DDS device capable of producing high-. The AD9834 provides phase modulation and frequency modulation ... morecapabilities. resolution of 0.28Hz. Similarly, the AD9834 can achieve a resolution of 0.004Hz at.
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$3.30 Shipping Condition: New Location: China Micro USB DC 2CH Adjustable PWM Signal Generator Duty Cycle Pulse Frequency Module Digital LED Display Tube DC 5V 12V 24V. Two independent PWM generators ... morecan set the frequency, duty cycle;. "100" indicates that the PWM output pulse of 100Hz;.
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$2.55 Shipping Condition: Neu Location: China Output 7.83HZ pulse square, whose duty cycle is 50%. Frequency can be fine-tuned for correction. This product is Schumann 7.83HZ very low frequency generator, ... morefeatures high accuracy and stability. Pulse square :7.83HZ.
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$4.50 Shipping Condition: New Location: China It is capable of fast frequency hopping while also featuring precision frequency tuning (0.01Hz or higher resolution) and phase harmonics (0.022° interval). ... moreThe default program is1hz adjustable. Users who need higher accuracy need to modify the program themselves can program through a high-speed serial I/O port.
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Free Shipping Condition: New Location: United States Keep away from those with implanted pacemakers and other life support electronics (10m/32.8ft range)! 1 Tesla Coil(Power cord not included). Fixed frequency ... moremode: After the coil is powered on, switch the mode switch to the fixed frequency position (left).
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$3.20 Shipping Condition: Neu Location: China Oscilloscope specifications. 1 x Oscilloscope. Waveforms: sine wave, rectangular wave, sawtooth wave, half wave, full wave, positive step wave, anti-step ... morewave, noise wave, exponential rise, exponential fall, DC signals, multi-audio, Sink pulse, Lorentz wave.
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$3.50 Shipping Condition: New Location: China Schumann wave electromagnetic wave is very low frequency, can penetrate any material, is non-free radiation. And each person is a weak potential network, ... moreby the Schumann wave excitation, it will produce frequency resonance, the strength of its resonance and the internal structure of the electrical network (human body).
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