Product Features:
1.This product has two kinds of carts controlled by LM393 and 51 microcontroller
2.LM393 is a voltage comparator,suitable for primary and secondary school students to explore
3.51 microcontroller controlled smart carts can realize more functions than the LM393's,but need some foundation

Working principle of D2-1 Tracking Car:
LM393 constantly compares the size of two photosensitive resistors. When there is an imbalance (such as one side pressing the black runway), it immediately controls the motor on one side to stop rotating, while the other side accelerates rotation, causing the car to correct its direction and return to the correct direction. The entire process is a closed-loop control, so it can be quickly and sensitively controlled.
Working Principle of D2-5 Tracking Car:
LM393 constantly compares the size of two photosensitive resistors. When there is an imbalance (such as one side pressing on a black runway), it immediately controls one side of the motor to stop rotating, while the other side of the motor accelerates rotating, so that the car corrects its direction and returns to the correct direction. The entire process is a closed-loop control, so it can be quickly and sensitively controlled
D2-2/51 Tracking Car:
This D2-2 adopts an infrared detector with good resistance to light interference! Adopting 51 microcontroller AT89C2051 and providing C language source code. This kit is a loose part and requires you to weld and install it yourself
The kit includes: a complete set of components, circuit boards, circuit diagrams, track finding, assembly and debugging instructions, C language source programs, etc
D2-6/51 microcontroller Bluetooth Intelligent Car:
Working voltage:DC3.7V(one battery)
Circuit board size:405mm*72mm
The D2-6 Bluetooth Car Kit is the latest version of the D2 series kit, which uses a microcontroller as the core and achieves various functions such as tracking, obstacle avoidance, Bluetooth control, and mobile phone gravity sensing control through program control. This set of cars is equipped with a serial port interface, and wireless remote control function is achieved by connecting to a Bluetooth module. Compared to the previous D2 series cars, which can only control forward movement, D2-6 has added more functions, which can not only achieve forward movement but also reverse movement. The power supply only uses a single 3.7V carp battery, which is rechargeable and reduces usage costs

Package Type:
All goods will pack into cartons and wrapped full of waterproof tape before shipment.

We can accept customized package to meet different requirements:
1.Every item will separately pack into plastic bag,component,module can be packed in anti static bag.
2.Some fragile products such as the display screen can be packed in bubble bag.
3.Some large machines can be packed in wooden cases.
4.We can label JH code or client's code on package so that customers can check easily after receive goods.