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4KM-Long-Range-RF-link-kits-with-encoder-and-decoder
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Details about  4KM Long Range RF link kits with encoder and decoder

4KM Long Range RF link kits with encoder and decoder

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Item Information

Item condition:
New
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7 available / 93 sold
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Price:
US $19.99
 
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New condition
19 inquiries
93 sold
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Shipping:
$2.90 ePacket delivery from China | See details
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Item location:
Shen Zhen, China
 
Ships to:
Worldwide
Delivery:
Payments:
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International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
Returns:
14 days money back, buyer pays return shipping See details
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eBay item number:
130545302887
Seller assumes all responsibility for this listing.
Last updated on  Jun 06, 2013 19:54:01 PDT  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
 

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Transmission Board

This board uses SAW(SAW) oscillator, with high frequency stability and small temperature drift. Even while touching the antenna with hand, there is no frequency offset. Its frequency error is very small, typically less than +/- 75kHz, which is far less than +/-500kHz frequency error of LC oscillator. The transmitter module size is small. It's operating voltage range is 3V-12V. So it has high emission power and low power consumption. All contribute to stable performance.

It adopts SMD technology, and the most advanced SAW resonator (SAW) components for frequency stabilization. The circuit board (PCB) is made of material with the smallest dielectric loss. All the prodcuts has passed strict QC inspection before delivery.

Technical parameters

  • Operating Voltage (V): DC 9
  • Emission current: > 100
  • Quiescent Current: ≤ 0.02uA
  • Size (mm): 49 * 31 * 8
  • Modulation: AM
  • Encoding type: fixed code (welding code)
  • Emission distance: 4000 meters (in open area)
  • Frequency (MHZ): 433MHZ or 315MHZ (We will ship randoms if buyer leaves no message)

Operation instruction

Emission board has 7 external interfaces.

  • VCC: power supply
  • GND: GND
  • D0/13, D1/12, D2/11, D3/10: data
  • ANT: antenna

We recommend that 28CM soft wire or other hard metal of 28CM(such as the rod antenna) is connected to ANT as an antenna. If soft wire is used, it is recommended to straighten it to get the best results.

Address coding:8 bits, which can be respectively set to vacant, High (H) or low (L). Address code can be defined or changed according to the needs (Only if the transitter and the receiver have the same address, they can communicate).

Data coding: 4 bits. The data code has only two states: high (H) and low (L). When one pin is set to high when the other pins are low, the corresponding output pin of receiver modules is high.

Please note:

  • Emission board has strict requirements to power supply. If power is short, transimission distance will be greatly shortened.
  • It is recommended to check whether the transmitter frequency and resistance matches with receiver's. If not, receiving distance will become short or even receiving fails. Try not to receive near metal.
  • Pull out the antenna when launching pieces of the best, our commitment is fired from the launch of the antenna block all pulled out, the receiving antenna are all straight panels, firing block and Receiver are the height of 1.5m from the earth, Receiver only drive a light-emitting diode, in the flat, open, non-interference in the environment can reach the distance.
  • The emission board is instantaneous emission type. emission time should not more than 3 seconds, and the interval should be more than 3 seconds. When distance between transimitter and receiver is small, power voltage can be reduced.If the power voltage is 6V, transmission distance would be in half. If you just need one channel, you can directly connect pin 10,11,12,13 to high and the others to low.
Receiving Board

Specifications:

  • Operating Voltage: DC 5V
  • Operating frequency: 315/433MHz (We will ship randoms if buyer leaves no message)
  • Operating Current: 2.5mA
  • Receiver sensitivity:-107dBm
  • Encoding: fixed code
  • Work: M4/L4
  • Modulation: AM (OOK)
  • Operating temperature: -40 ℃ ~ +85 ℃
  • Dimensions: 41* 24* 9mm

Products

  • With effective mirror interference rejection, multi-boards can work together;
  • High sensitivity, with internal phase-locked loop to stabilize frequency.
  • Easily certified by CE, FCC.

Pin Description:

Pin

Name

Function

1/8

GND

Power negative

2

VCC

Power positive

3

17

Output indication

4

13

Data output

5

12

Data output

6

11

Data output

7

10

Data output

Dimensions (mm):


Shipping Information

PLEASE DO NOT CHOOSE FREE SHIPPING IF YOU COULDN'T WAIT!!!!!

Standard Int'l Shipping is recommended !!!

Economy Int'l Shipping

(Free Shipping)

Usually we ship it as Registered Mail of China Post(trackable) or Air Mail of HK Post (not trackable).The shipping time is usually 15~45 workdays.

Registered Mail of China Post has a tracking number. Sometimes it is fast but sometimes it is slow.

Air Mail of HK Post is not trackable. If you don't receive it within 45 workdays, please contact us and we will ship again.

Standard Int'l Shipping

We shipped mails as Registered Mail of Hongkong/Singapore Post. For most countries, you could track the whole shipping process. Usually it is faster than the Free Shipping above.

You could refer to this document to learn the shipping time.

Express Delivery ShippingThis shipping service contains DHL, UPS, EMS and Fedex. Usually it takes 4~7 workdays. If you couldn't find this option but you need it, please contact us.

Hanlding time will be 1~3 workdays.

Shipping Policy

  • Import duties and taxes are supposed at buyers' charge.
  • We always mark our customers' parcels as a gift.
  • We ship to worldwide.

Returns and Refund Policy

We will ship again or do the refund if you are not satisfied with our products for any reason. For due to our products' problem, we will do full refund (including shipping fee).

Note

DO NOT LEAVE NEGATIVE FEEDBACK BEFORE CONTACING WITH US.All the problems could be solved well. Please contact us if you have any problem. Negative feedback offers no help to solving problems. We keep the right to refuse offering any post-sale service if negative feedback was received.

Questions and answers about this item

No questions or answers have been posted about this item.




Seller assumes all responsibility for this listing.

Shipping and handling

Item location: Shen Zhen, China
Shipping to: Worldwide
Handling time
Will usually ship within 1 business day of receiving cleared payment - opens in a new window or tab.

Return policy

After receiving the item, contact seller within
Refund will be given as
Return shipping
14 days
Money back
Buyer pays return shipping

Payment details

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Interest will be charged on your account from the posting date (which is usually within a few days after the purchase date) if the purchase balance is not paid in full within financing period. Subject to credit approval. See terms - opens in a new window or tab
 
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