Weekly New!!! SIM868 GPRS Module, TFT Color LCD and Rotary Encoder Module Arrives Today

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Now Let's look the top 5 new arrivals this week!

SIM868 Development Board GPRS GSM GPS Bluetooth Module Core Board for Arduino/STM32/51

SIM868 module is a compatible Quad-Band GSM/GPRS module which combines GNSS technology for satellite navigation.
The compact design which integrated GPRS and GPRS/Glonass in a SMT package will significantly save both time and costs for customers to develop GNSS enabled applications. Featuring an industry-standard interface and GNSS function,it allows variable assets to be tracked seamlessly at any location and anytime with signal coverage.

General Features:
1.Quad-band 850/900/1800/1900MHz
2.GPRS multi-slot class 12/10
3.GPRS mobile station class B
4.Compliant to GSM phase 2/2+: class 4 (2W, 850/900MHz); class 1 (1W, 1800/1900MHz)
5.Dimensions: 17.6*15.7*2.3mm
6.Control via AT commands (3GPP TS 27.007, 27.005 and SIMCom enhanced AT Commands)
7.Supply Voltage Range: 3.4-4.4V
8.Low power consumption
9.Operating Temperature: -40~85 Celsius

Specifications for GPRS Data:
1.GPRS class 12: max. 85.6kbps (downlink/uplink)
2.PBCCH support
3.Coding schemes CS 1, 2, 3, 4
4.PPP-stack
5.USSD

Specifications for SMS via GSM/GPRS:
1.Point to point MO and MT
2.SMS cell broadcast
3.Text and PDU mode

Rotary Encoder Module Brick Sensor Development Round Audio Rotating Potentiometer Knob Cap for Arduino

Product Introduction:

1. Operating Voltage: 5V 

2. Pulse Number for One Circle: 20

3. Rotary encoder can count the output pulse times by rotating positively and negatively. This counting method has no limitation,it can reset and come back to the  initial status if matching with the key on the encoder (that is to say it will count from 0).

4. Operating Principle: Incremental encoder is a kind of rotary sensor which transforms the rotation displacement into a series of digital pulse signal. These pulses are used to control angular displacement. In Eltra encoder, the transformation of angular displacement adopts photoelectric scaning principle. The reading system is based on the radial dividing plate's rotation of alternative light window and non-light window, and it will be exposed to infrared light source at the same time. 

   The light will reflect the picture of plate on the surface of receiver. The receiver is covered by a diffraction grating, and it has the same window width with the plate. The operation of receiver is to detect the change of light plate rotation, then transform the light change into electric change. Increase the low level signal into high level and generate square pulse without any interference. This process needs circuit to deal with. The reading system usually adopts differential method, that is compare two different signals who have the same waveform bu the phase difference is 180 degree so as to improve the output signal quality and stability. Reading is formed on the basis of the difference between two signals, so it eliminates the interference.

3.3-5V Digital Barometric Pressure Sensor Module Liquid Water Level Controller Board Module 0-40KPa

Product Introduction:
1.Size: 19*18mm (2mm fixing hole)
2.Voltage: 3.3-5V
3.Pressure: 0-40KPa
4.This module adopts high precision AD sampling chip and 0-40KPa air pressure sensor.
  And it can connect 2.5mm soft tube and detect the water level and other air pressure.
5.Adopt 5K ohm resistor bridge sensor, and specific air pressure value needs calculating.

1.8" 1.8 Inch TFT LCD Screen ST7735 128x160 Support Micro SD Card 3.3V 5V for Arduino

Product Introduction:

1.LCD Screen Size: 1.8 inch

2.Input Voltage: 3.3V, 5V 

3.Memory Medium Type: micro SD 

4.TFT Driving Chip: ST7735

5.Dot Matrix: 128x160

3.7V 6x12mm 612 Micro Coreless High Speed Motor Shaft Length 4mm for Airplane Model