Key Features :

1. Model : 28BYJ-48
2. Number of Phase : 4
3. Speed Variation Ratio : 1/64
4. Stride Angle : 5.625? /64
5. Rated voltage : DC [5v – 12v]
6. DC resistance : 5v: 60??7%(25?); 12v: 130??7%(25?)
7. Frequency : 100Hz
8. Idle In-traction Frequency : > 600Hz
9. Idle Out-traction Frequency : > 1000Hz
10. In-traction Torque >34.3mN.m(120Hz)
11. Self-positioning Torque : 5v: >29.3mN.m; 12v: >42.1mN.m
12. Friction torque : 600-1200 gf.cm
13. Pull in torque : 300 gf.cm
14. Insulated resistance >10M?(500V)
15. Insulated electricity power : 600VAC/1mA/1s
16. Insulation grade : A
17. Rise in Temperature <40K(120Hz)
18. Noise <35dB(120Hz,No load,10cm)

?Key Features :

1. – Diameter:68mm
2. – Width:26mm
3. – Other size refer to below picture
4. – Weight:40g/pc

Key Features :

1. 1. Stepper motor is known by its property to convert a train of input pulses into a precisely defined increment in the shaft position.
   2. This is a high-quality motor that can be used for a long time without stuck.
   3. It has a quite stable performance during work and will not lose step.
   4. Low noise and big torque, this is a great choice if you need a stepper motor.
   5. Stepper motor can be widely used for a 3D printer, CNC engraving machine, etc.

?Key Features :

• • • Uses CH340G instead of CP2102.
    • Wireless 802.11 b/g/n standard
    • WiFi at 2.4GHz, support WPA / WPA2 security mode
    • Support STA/AP/STA + AP three operating modes
    • Built-in TCP/IP protocol stack to support multiple TCP Client connections (5 MAX)
    • Support UART / GPIO data communication interface
    • Remote firmware upgrade (OTA)
    • Support Smart Link Smart Networking
    • Don?t need to download resetting
    • A great set of tools to develop NODEMCU
    • Lowest cost WI-FI
    • FOR Arduino like hardware IO
    • Greatly speed up your IOT application developing process
    • Open-source, Interactive, Programmable, Low cost, Simple, Smart, WI-FI enabled
    • WI-FI MCU ESP12E integrated and easy to the prototyping development kit.
    • We provide the best platform for IoT application development at the lowest cost.
    • NodeMCU has built-in USB-TTL serial with super reliable industrial strength CH340G for superior stability on all supported platforms.
    • Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
    • Event-driven API for network applications, which facilitates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.

?Key Features :

1. Product use: rain, rain sensor, can be used for all kinds of weather monitoring, and translated into output signals and AO.
   The sensor USES the high quality FR ? 04 double material, large area of 5.5 * 4.0 CM, treatment of nickel plating and surface, have fight oxidation, electrical conductivity, and life has more superior performance;
   The comparator output, signal clean, good waveform, driving ability is strong, for more than 15 mA;
   With potentiometer sensitivity adjustment
   The working voltage of 3.3 V to 5 V
   The output format: digital switch output (0 and 1) and analog AO voltage output;
   Has a fixed bolt hole, convenient installation
   Small board PCB size: Approx. 3.2 cm x 1.5 cm
   The LM393, use of wide voltage comparator

?Key Features :

1. • Modes?Toggle or switch.
   • Operating current @VDD=3V, no-load, SLRFTB=1.
   • The response time max about 60mS at fast mode, 220mS at low power mode @VDD=3V.
   • Sensitivity can adjust by the capacitance(0~50pF) outside.
   • Have two kinds of sampling length by pad option(SLRFTB pin).
   • Stable touching detection of the human body for replacing traditional direct switch key.
   • Provides Fast mode and Low Power mode selection by pad option(LPMB pin).
   • Provides direct mode toggle?mode by pad option(TOG pin), the open-drain mode by bonding option, OPDO pin is an open-drain output, Q pin is CMOS output.
   • All output modes can be selected active high or active low by pad option(AHLB pin).
   • Have the maximum on-time 100sec by pad option(MOTB pin).
   • Have external power-on reset pin(RST pin).
   • After power-on have about 0.5sec stable-time, during the time do not touch the keypad, And the function is disabled.
   • Auto calibration for life.
   • Re-calibration period is about 4.0sec when the key has not to be touched.