Smart Robot Car DIY Kits D2-1 Tracking Line Car Automobile Parts DIY Electronic Toy
Specification:
Color: Blue
Product Size: 10.5cm x 8cm x 5cm
Working Voltage: 3V
Package Includes:
1 Smart Robot Car Kits(Spare parts)
Note: It's diy kits. Need to solder by yourself.
The package does not include battery.
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.
Function Description:
In the white field there is a 16 mm wide black runway, our track trolley can automatically travel along the black runway, no matter how the runway is bent trolley can automatically travel is really amazing! We know that the reflectivity of the light source is different when it is shot to white objects and black objects, we Here we use red LED as the light source, the light is reflected through the ground to the photo Through the detection of the photoresistor resistance change can determine whether the car is traveling If it detects a black runway, it means that the trolley runs off, and the motor on this side will slow down or even stop the green LED on this side. LED goes out, driving the car in the opposite direction. In this way, the car can always follow the runway.
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LM393 compares the size of the two photoresistors at any time, and when there is an imbalance (for example, one side of the black runway) immediately
control one side of the motor to stop, the other side of the motor to accelerate the rotation, so that the trolley corrects the direction and returns to the correct direction.
The whole process is a closed-loop control, so it can be controlled quickly and sensitively.
When the owner drives the car, first insert the key and set the switch to "ON" position, the positive current will be injected into the base of VT2 through VD4 and R10 to make VT2 conductive.
The positive current will be injected into the base of VT2 through VD4 and R10 to make VT2 conductive, so that the "6" pin of U1B will be clamped at low level and U1B will be blocked. At this point, no matter how to move or drive the vehicle, the U1B is blocked.
At this point, no matter how to move the vehicle or drive, because the U1B "4" pin is always kept low, the alarm will not edge.
Assembly steps:
The first step: circuit part of the basic welding
The welding circuit part is relatively simple, the welding sequence according to the element height from low to high, the first 8 resistance welding, welding must use a multimeter to confirm whether the proper welding resistance, polar components such as transistors, green lights, definitely clear electrolytic capacitor polarity as reference element we are photo welding, welding capacitor short is the negative side of the insertion pin PCB screen printing shadow, green welding LED note long pin is positive, and the welding is not too long or easy bad welding, D4 D5 R13 R14 can temporarily do not weld, the integrated circuit chip can be inserted, preliminary after completion of welding check carefully prevent, be negligent.
Second step: mechanical assembly
The universal wheel screw is inserted into the PCB hole, and screwed into the universal wheel nut and a universal wheel. the battery box is stuck on the PCB by the double adhesive tape, the lead wire passes the PCB reserved Kong Han received PCB, the red line is connected with the 3 V positive power supply, and the yellow line is connected to the ground.
Mechanical part and assembly can be mounted first wheels, wheel consists of three pieces of black acrylic round tablets, assembly prior to exposing protective film, the inside of the wheel center hole grows circular hole, middle of the round plate diameter is relatively small, lateral wheel piece center hole Shiyuan, with two screw nuts fixed set good three round tablets, and black self-tapping screws fixed on the rotating shaft of the engine. Finally the silicone rubber tire sleeve on the wheel. Lead connection lead wire of the motor and the wheel assembly is the use of the glue on the PCB making position, attention wheels and the PCB edge retaining sufficient clearance, the motor leads are soldered to the PCB. Note that adequately longer lead, to avoid the motor rotation direction error is convenient for changing the lead wire of the order.
The third step: the installation of opto-electronic circuits
Photosensitive resistance and light-emitting diode (attention polarity) is the reverse installed on the PCB, and the ground distance of about 5mm, the distance between the light-sensitive resistance and light-emitting diode is also about 5mm. Finally can pass electrical test.
The fourth step: Vehicle debugging
In the battery box in 2 AA batteries, switches to dial in the "on", the car driving right reverse is traveling along the direction of the universal wheel, if hold the left side of the photosensitive resistance, the car to the right of the wheel rotation, Keep to the right of photosensitive resistance, the left side of the car wheel must turn, if car travel back can exchange connection of two motors at the same time. as one of the normal back on the other side as long as the exchange of the rear of the motor can be wiring.
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