Practice Soldering Learning Electronics Smart Car Soldering Project Kits J9V5

Description: Description Description&Previewshipping&policyDescription: Car introduction: After successful assembly, the trolley can move forward along the black track with a width of about 15mm. The circuit consists of photoelectric sensing, voltage comparison, and motor drive. The principle is that the reflectivity of the light-emitting tube projected to the black and white parts is different, and the light intensity reflected to the receiving of the photoresistor is different, resulting in a change in the resistance of the photoresistor. LM393 compares the size of the two photoresistors, controls the operation of the motors on both sides, thereby correcting the direction of the car to ensure that the car moves along the black track. Kit parameters: Power supply voltage: 3V (the kit does not contain batteries, you can buy two AA batteries yourself) Board size: 7. 2*10. 5cm Main control chip: LM393 voltage comparator chip, without programming control, LM393 classic application circuit, teaching model Use Reminder: Since many customers have come to ask why only one side of the wheel turns after the trolley is installed, and the LED light on the top side is on, hereby declare that after normal welding and assembly, when it is not on the track, it is normal that only one side of the wheel turns, and the top side on the same side The LED is on, and both LEDs below are on. When walking on the track, the wheels on both sides rotate alternately so that the wiring can be realized. For details, please see the welding production video (to be uploaded). If you want to make your own track, the turn of the track should not be too large. Soldering Tips: The height of the main photoresistor and LED under the front of the car should be moderate, the photoresistor and LED should be parallel, placed on the ground, about 0.2-0.4CM from the ground (you can see the picture if you are not clear), the sensitivity also mainly depends on the welding specification here To what extent. For the installation of the motor gear part, if children have difficulties in installation, you can ask adults to help, and a welding installation video will be released later for your reference. There is a black runway with a width of 15mm on the white field. Our tracking car can drive along the black runway automatically. The reflectivity of white objects and black objects is different. Here we use red LED as the light source. The light is reflected from the ground to the photoresistor. By detecting the change of the resistance of the photoresistor, we can judge whether the car is driving in the white area. If If a black runway is detected, it means that the car is running off track, the motor on this side will slow down or even stop, and the green LED on this side will go out, driving the car to the opposite direction, so that the car can always drive along the track. package includes 1*set of loose parts (not including battery) Preview: Thank you for your purchase Problems? You can follow below process to contact us. There is a time zone difference,but we will do our best to quickly response to your questions: Shipping ● We will arrange shipping for you within 24 Hours after payment cleared except the holidays. ● We always send the item to the address you give us on Payoneer to ensure the security of the item. If you have changed your address, or want us to ship to another address, please change to the new address when you pay us with Payoneer, otherwise we will not be responsible if the package is lost. Payments We accepts Payoneer only If you have any questions about the payment,please contact us through eBay message. Import Duties In case some duty is due Upon delivery, it is your responsibility to meet that expense and this may cause delays to delivery schedule and you may have to pickup goods at the customs office. Terms & Conditions By bidding on this item,the Buyer agrees to all of the terms and conditions as outlined in this listing .please ensure to read and agree to All eBay terms and Conditions before bidding. All pictures are for illustration purpose only and Colours may vary slightly. Our store obeys all eBay Rules and Policies. Returns Policy To Return an item you must contact us and take photos of your item to clearly show any damage or unusual aspects of it. Approved returns will be subject to inspection on arrival. Items must be returned in original condition with all original packaging. All shipping and handing charges are non-refundable Return delivery costs are the responsibility of the buyer. We will cover the cost if sending replacement/repaired items. Within 7 days after receiving your products, we offers a no-hassle 7 day exchange/replace only if your items are found to be defective by manufacturer.

Price: 4.98 USD

Location: shanghai

End Time: 2024-12-13T19:21:05.000Z

Shipping Cost: 0 USD