10pcs meter

10Pcs 1100 Meter Long Distance NRF24L01+PA+LNA Wireless Module Board With Antenna Desription: NRF24L01P + PA + LNA Division for the ultra-long-distance data transmission, specially developed high-power and high sensitivity wireless module 2.4G ISM band NRF24L01P + PA + LNA wireless module to work in the license-free that can be point-to-point applications or be composed of a star network. Digital transmission chip NRF24L01+ with the Division of Professional Design professional full two-way RF power amplifier high power PA and LNA chip, RF switches and band pass filters, makes effective communication distance greatly expand. RF part, it has been done a lot of optimization matching debugging. The emission efficiency to achieve the highest harmonic minimum and make NRF24L01P + PA + LNA wireless module of RF interference to the external equipment reaches minimum, while not susceptible to interference from other devices. NRF24L01P + PA + LNA wireless module integration is extremely high, the size is 41mm x 15.5mm to make conveniently embedded. Package included: 10 x 1100 Meter Long Distance NRF24L01+PA+LNA Wireless Module Board With Antenna

10Pcs Mini 1A Lithium Battery Charging Module Board With USB Interface Description: Charging method: linear charge 1% Charging current: 1A adjustable Charge accuracy: 1.5% Input voltage: 4.5V-5.5V Full charge voltage: 4.2V Charging indicator: Red charging green full charge Charging input interface: Mini USB Working temperature: -10C to +85C Reverse: NO Size: 25 x 19 x 10mm Note: Ampere meter can only be connected to 5V input end of the module. It is better that the charging current is 37% of the battery capacity. If you charge to the battery of 1000mAH, current of 400 is enough. The connection wire should not be too long. Make sure the connect point is good. If the input voltage is too high, like 5.2V, the current will be less than 1000mA, it is normal. It is protection function, Auto-substract the charging current to avoid burn damage to chip. Input reverse has no effect on the chip, but the output (battery terminals) reverse will burn chips. Applications: This module is used for single-or multi-section parallel lithium lithium rechargeable battery, charging from the USB port to take power. Package included: 10 x 1A lithium battery charging module

Buy 10pcs Green DC2.7-30V LCD Display Digital Voltage Meter Waterproof Dustproof 0.4 Inch LED Digital Tu for R930.00

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Buy 10Pcs 1100 Meter Long Distance NRF24L01+PA+LNA Wireless Module Board With Anten for R857.25

Feature: – Operating voltage:DC 4.5 – 30V – Measure voltage: DC 0 – 100V – Minimum resolution(V): 0.1V – Measure current:50A (require external shunt) – Minimum resolution(A): 0.1A – Operating current: – Display: three 0.28" LED digital tube – Display color: Red and Blue (two-color display) – Dimensions: 48 x 29 x 21mm – Mounting cutout: 45.5 x 26.5mm – Refresh rate: about 500mS / times – Measure accuracy: 1% (± 1 digit) – Operating temperature: -10 to 65°c – Operating Humidity: 10 to 80% (non-condensing) – Working pressure: 80 to 106 kPa – Applications:Suitable for automotive/electric cars/motorcycles battery monitoring or other products voltage current measurement – Wiring: Black line (thin): vacant or buck circuit (module) negative Red line (thin): power supply+ Black line (thick): COM, common measuring Red line (thick): PW+, measuring terminal voltage input positive Yellow line (thick): IN+, current input+ Notice: – The voltage between the thin red and thin black lines must be within DC 4.5-30V – The ammeter can only be connected to the negative of the device under test – Exceeds 5A, long-term full load working continuously, it is recommended that the measurement side of the leads are directly soldered to the socket – When the black thin line vacant, it is better to use insulating tape around the exposed part of the wire, to prevent short circuits – If just be used as a voltmeter, it is recommended that the yellow line and the black line were connected together, to prevent the ammeter digital flashing Package included: 10 x Digital Volt Amp Meter 10 x 50A / 75mV DC Current Shunt

Specifications: Color: Black Shape: Cylindrical Capacitance: 10 Farad Max Voltage: 2.7V ESR: 60mΩ permissible voltage: 2.5V Lead wire type: Same direction Diameter: 10mm Length: 26mm Allowable deviation: -20~40 (%) Dielectric material: Super farad Frequency: Low frequency Application scope: Low voltage Features: - Good quality - High cost performance - Low temperature and low internal resistance and low leakage current - The volume is small, but the capacity is big. The capacity is bigger than the same volume electrolytic capacity about 30~40 times. - The power density of the capacitor is 10~100 times of the battery. It can even reach about 10kw/kg. - Charging speed is quick. - With super long life which is up to more than 100 thousand times, and is more than 10-100 times the battery. - Less pollution. Application for: - CPU intelligent home appliance, meter, tax control machine, controller, air conditioning, recorder, MP3, car audio, telephone, solar lights, real-time clock etc. - Power supply of small power devices, such as: intelligent water meter, gas meter, disinfection cabinet, electronic door locks, solar equipment, digital set-top boxes, toys, etc.; - Electric starting system, with the battery used in various internal combustion engines such as cars, tanks, diesel locomotives, can effectively protect the battery and prolong its service life, reduce the power loss with capacity, especially in low temperature and battery case, ensure reliable start Package included: 10 x Super farad capacitor

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Specification:   1. With the voltmeter shows voltage meter error ± 0.1V, the range 0-40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage of 4V and above) 2. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages 3. Power off memory function, show that road after power voltage values measured for the last time 4. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display 5. The band terminals, no iron can also be easy to use, and retention wire connection point 6. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.) 7. The adjustable output voltage range of 1.25V-37V continuously adjustable (input voltage must be higher than the output voltage to a high of about 1.5V) 8. The maximum output current up to 3A, normal and stable operating current of 2A 9. the internal oscillation frequency 150KHz, belonging to the second generation of switching voltage regulator, low power consumption, high efficiency 10. The current switching LEDs are red   Package Included:   10 x DC-DC step down voltage converter  

Feature: Note: This module does not suitable for IOS system. TTL data transparent transfer between a host Bluetooth device Build-in CSR company Bluetooth chip BC417143 Bluetooth specification v2.0 + EDR Works with any USB Bluetooth adapters Default Baud Rate: 9600, pairing code 1234, the working mode SLAVE Coverage up to 30ft Built in antenna Mini Size Using mainstream CSR Bluetooth chip, Bluetooth V2.0 protocol standards Serial module operating voltage 3.3V, 10 meters from the general The working current: pairing: 30mA ~ 40mA Sleep current: not sleep For GPS navigation systems, utility meter reading systems, industrial control systems mining site Can be used with a Bluetooth laptop computer plus a Bluetooth adapter, PDA and other devices to connect seamlessly Specification: Power input: +3.3V DC Signal coverage: 30ft Size: 26.9 x 13 x 2.2mm Application: This module is mainly used for wireless transmission of data in the field a short distance. And PC can be easily connected Bluetooth device, you can also exchange data between two modules. Avoid cumbersome cable connections, direct serial cable replacement. Package included: 10 x HC-06 30ft wireless bluetooth RF transceiver module

Features: TCRT5000 sensor of infrared emission diode constantly launch infrared, the infrared ray is emitted when the intensity of reflected back has not been reflected or but is not big enough, the light activated triode has been in the off state, the output end of the module at this time for the high level, indicating diode has been put out state; Detected objects appear within the scope of testing, infrared light is reflected back and strength is enough big, light activated triode saturation, at this time the output of the module for the low level, instructs the diode lights. Specification: 1. Using infrared reflection sensors TCRT5000 2. Test reflection distance: 1mm to 25mm 3. Clean and the comparator output, signal waveform, driving ability is strong, for more than 15 ma. 4. With many adjustable precision potentiometer to adjust sensitivity 5. The working voltage of 3.3V to 5V 6. Output form: digital switch output (0 and 1) 7. Has a fixed bolt hole, convenient installation 8. Small board PCB size: 3.1cm x 1.4cm 9. The LM393, use of wide voltage comparator 10. Applications: 1, the electricity meter pulse data sampling 11. Fax machine, shredder paper detection 12. Obstacle detection 13. Black and white line detection Package included: 10 x TCRT5000 Module

Description: Power to other devices by power Bank. Such as: routers, USB lights, USB fans, radiators, 5V mini speakers, etc. Outer diameter: 5.5mm, inner diameter: 2.1mm; Inner positive, line length 1 meter With boost components, the USB 5V input voltage through the components boost to 12V voltage 0.8 ~ 1A. Package included: 10 x 5V To 12V Power Line

Specification: 1. With the voltmeter shows voltage meter error ± 0.1V, the range 0-40V. (Note: To ensure the accuracy of the voltmeter, please ensure that the input voltage of 4V and above) 2. Touch the key to switch measuring input or output voltage, and has a light show which is being measured voltages 3. Power off memory function, show that road after power voltage values measured for the last time 4. Press the touch button for 3 seconds to turn off LED display, touch the button again to turn on the LED display 5. The band terminals, no iron can also be easy to use, and retention wire connection point 6. Input voltage 4.0-40V (input voltage to the output voltage must be higher than 1.5v.) 7. The adjustable output voltage range of 1.25V-37V continuously adjustable (input voltage must be higher than the output voltage to a high of about 1.5V) 8. The maximum output current up to 3A, normal and stable operating current of 2A 9. the internal oscillation frequency 150KHz, belonging to the second generation of switching voltage regulator, low power consumption, high efficiency 10. The current switching LEDs are red Package Included: 10 x DC-DC step down voltage converter

  In Stock. Dispatched within 24hrs!   Description: Shape: Block Material: Nd, Fe, B Grade: N50 Plating: Ni-Cu-Ni(Nickel) Color: Silver Quantity: 10pcs Size:20*10*5mm(Length*Wide*Hight)Hole 4mm Max Temp (degrees C):80 Strong magnets should Keep away from Ironware and some easily magnetized iron products, such as monitors, bank cards, computers, televisions, mobile phones and other Strong magnets should be stored in a dry, heated environment, and need to use of plastic, wood, cardboard, foam to separated and wrapped. Magnets might affect water meter,electric meter, gas meter and some metering equipment exist some inaccurate affect (Such as: if magnets placed near the meter, the meter will slow down)   Note: Be careful fragile and clip hand, placed in a dry place, stored at room temperature! WARNING: We would not recommend this magnet be used by children under 5 without supervision!   Package Included: 10 Block Magnets