This gear motor wheel is perfect for your next robotics project. This gear motor is ideal for robotic car or line-tracing robot. With plastic construction and colored in bright yellow, the DC gear motor measures approx. 2.5 inch long, 0.85 inch wide and 0.7 inch thick . The wheel can be mounted on either side and the gearmotor works well between 4V to 7V (recommended 6 Volts). At a ratio of 1:48 you can get some really good torque at 5 Volts.

Motor Specifications
Operating voltage: 3V ~ 6V DC (recommended value 5V)
Maximum torque: 800g.cm
Speed without load: 180±10rpm at 6V
Reduction ratio: 1:48
No Load current: 190mA(max.250mA) continuous, 700mA at no load start
Stall Current: ~1A
Strong anti-interference on this motor keeps it safe around micro-controllers.

Click here for tutorial.

Features :

• The tutorial include codes,libraries and lessons.It will teach every users how to assembly the smart robot car kit and use R3 controller board, sensors and modules.
• LAFVIN robotic car learning kit is designed for beginners to learn Arduino programming and get hands-on experience on robot design and assembly
• This kit includes R3 Board HC-SR04 Ultrasonic Sensor,V5.0 extension board,Line tracking module,Bluetooth module,etc.
• You will learn the Line Tracking, Ultraviolet Obstacle Avoidance, IR Remote Control, Bluetooth Remote Control of Smart Car, you can also extend other functions on this robot platform.
• This car really excellent and safe to be a perfect gift for your children and friend.

Description Multi-Functional Smart Car kit

•  UNO R3 1pc
•  USB cable 1pc
•  V5.0 extension board 1pc
• L298N motor driver board 1pc
•  Ultrasonic Sensor 1pc
•  Ultrasonic holder 1pc
•  Servo motor(SG90) 1pc
•  Servo motor fixed plate 1pc
• Bluetooth module 1pc
• 3pcs Line tracking module
• Motor 4pcs
•  Wheel 4pcs
•  Remote 1pc
• IR Receiver Module 1pc
• Cell box 1pc
• Black tape 1pc
• 2pcs Acrylic plates
• 1pcs 40pin F-F dupont wire
• 5bag Screws and nuts for every part
• 1pcs 40pin F-F dupont wire

Turbidity(Water Monitoring) Sensor

Features:

• uses optics principles to synthetically estimate turbidity through the liquid light transmittance rate and scattering rate.
• Since the amount of haze value is gradual, it is usually detected in a dynamic environment.
• The  value that turbidity sensor collects need connecting external control for AD conversion to get a corresponding environment sensor situation, so that the sensor need a peripheral circuit to detect in a system.
• With waterproof probe, mainly used in washing machines, dishwashers and other equipment for turbidity testing.
• It can also be used on electronic design, graduate design, electronic competition experiments and other applications. 

Specifications :

• Operating Voltage: 5V DC
• Operating Current: 40mA (MAX)
• Response Time: <500ms
• Insulation Resistance: 100M (Min)
• Output Method: Analog
• Analog output: 0-4.5V
• Digital Output: High/Low level signal (you can adjust the threshold value by adjusting the potentiometer)
• Operating Temperature: -30 ~80
• Storage Temperature: -10 ~ 80
• Weight: 30g
• Adapter Dimensions: 38mm*28mm*10mm/1.5inches *1.1inches*0.4inches

Shipping List

•  adapter x1
•  probe x1
•  cable x1
• Gravity analog sensor cable x1

more info

shop here

The POWER SWITCH is a tiny MCU controlled on/off switch for your radio controlled model. A simple push button operates the switch meaning to eliminate theproblems associated with intermittent contact of an ordinary mechanical switch.The sealed unit is plastic and can easily be mounted to the transponder mount of your model or anywhere else you can mount it using double side tape. (Two kinds of bottom covers are included, user can change the bottom cover.) The switch also features a LiPo mode, by turning this on the switch unit will auto detect low LiPo voltage and cut off power to protect your LiPo from over dis-charging. This of course can be turn off if you have other safeguards in place or using NiMH/NiCad battery. Beside that the power switch informs you about the remaining capacity and conditions of your battery pack.

SWITCH ON/OFF SETUP

1. NiMH/NiCad Battery Pack

For switching on please press and hold the button for one second. The PWR LED will turn on. For switching off please press and hold the button until all LEDs turn off. The PWR LED also shows you the remaining battery capacity when switched on.

2. LiPo Battery Pack

For switching on please press and hold the button for more than three second. The PWR LED and LIPO LED will turn on. For switching off please press and hold the button until all LEDs turn off. The PWR LED also shows you the remaining battery capacity when switched on.

Specifications

Input Voltage: 4-12V
Max. Current: 10 Amp
Battery Mode: 1. NiHM / NiCad
2. LiPo
Low Voltage Protection: 6.2V(LiPo)
Operating temperature: 0-50℃
Weight: ≤7g

MANUAL

• This little circuit board may look tiny but inside is a high efficiency DC/DC step-down converter which can output up to 3 Amp at 5V without the need of any heat-sink or forced cooling.
• UBEC stands for “universal battery eliminator circuit” and this UBEC is designed to replace a 5V supply in RC planes and ‘copters but its also great for any kind of microcontroller or electronics project that runs off of 5V.
• We tried a half dozen different ‘BECs and found this one to be the best in terms of range and stability. You can check the technical tab for the analysis of input/output range and current draw.
• To use, connect 6V-23V to the shorter, thicker wires and 5V will be generated on the thinner, longer wires.
• You’ll get 5V (+-5%) regulated output from 6 – 23VDC input. 3A output current, 5A peak – if you’re trying to draw 3A you’ll need to give it a little more than 6V though, 7V works well.
• The UBEC has built in filter capacitors on the input and output, but its a switching supply so its a little noisy compared to a linear regulator.