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I have a very cool DIY car here to share with you. The use of four deceleration direct current machine curve to be nimble, the directivity is good. Four actuations, horsepower fullness. The chassis big and steady very easy to expand Educational toys, help to improve the ability of children, suitable for young people at key stages of heart development With a car platform, add some micro-controller (such as Arduino) and sensor modules, and program it. Then you made your own robot car DC 6V 4-wheel Robot Smart Car Chassis Kits car with Speed Encoder for Arduino Educational kit for beginners(kid) to get hands-on experience about Robotics & Can extend electronics system like Raspberry Pi Arduino etc to realize function of tracing, obstacle avoidance, distance testing, speed testing, wireless remote control. Fortunately, you now see my share. Yes, we are doing activities now. We need 10 reviews to send this cool DIY car for free. If you are interested and want to get it, pleas

I remember once that the customer walked into my office with the processor board and said that it consumed too much power and drained the battery. Since we have proudly claimed that the processor is an ultra-low-power device, the burden of proof lies on our side. I am prepared to follow the usual practice to cut off the power of different devices on the circuit board one by one until I find the real one. Then I remember a similar case not so long ago. The “culprit” of that case was a single hung on the power rail and ground. Between the LED, no current limiting resistor is associated with it. The ultimate failure of the LED is due to over-current, or simply because it is boring, I can not be completely sure, but this is a digression, we will not talk about. From an experience point of view, the first thing I did was to check the shiny LED on the circuit board. But unfortunately, this time there is no similar hope that shows the hope. In addition, I found that the processor is the o

In the wake of the artificial intelligence wave, more and more devices have begun to join smart functions. As one of the important wearable devices, headphones have also begun to gradually enter the era of intelligence, which has also narrowed the gap between consumers and artificial intelligence. Distance, then what current intelligent headsets can have in addition to voice control, what "smart" experience can we bring? Today we will take a look. 1, voice interaction Voice interaction has always been a very important feature of smart headsets, for example, Google's Pixel Buds, because it supports Google Assistant voice assistant, allowing Pixel Buds to read information, emails, news and calendar reminders for users at any time, etc. Content, users do not need to pull out the phone to do extra operations and completely release their hands. In addition, Pixel Buds can do more, such as telling the earphone the name of the song he wants to listen to, switching to th

Bluetooth is no stranger to us. It is a wireless technology standard that enables short-range data exchange between fixed devices, mobile devices, and personal area networks of buildings. Today, Bluetooth can also be used to control cars on smart phones. In the era of rapid development of science and technology, there is nothing that can't be done. Follow this article to enter "circuit time"! System module The hardware design of the entire system can be divided into four modules: power supply circuit, minimum single-chip system, motor drive module, and Bluetooth module. The power circuit supplies power to the entire system, including the microcontroller AT89C52, motor drivers, Bluetooth modules, and other peripheral circuits. The power circuit is divided into two parts: (1) connect the external power supply to the motor; (2) use 4 dry batteries as power supply to supply power to the system to ensure the normal operation of the SCM, motor driver, and Bluetooth module.

Although the presence of the black border does have a certain influence on the aesthetics of smart watches, this design is actually a last resort, just like the reason for the existence of black bars on smart phones. After all, on a small smart watch, it is necessary to collect too much. Sensors, or many features can not be achieved, and manufacturers can only try to minimize the black border area. For example, in some smart watches will be installed under the screen light sensor and distance sensor, in fact, is for a very useful feature, that is, raising the hand bright screen function, and in any situation you just want to palm cover the whole block When the watch screen, it will directly enter the standby interface. This is the distance sensor. Moreover, the light sensor can also adjust the brightness of the watch according to the ambient light, which avoids the need for such a high brightness when the light is dark, and also achieves the effect of power saving. When the ambien

As one of the representatives of smart wearable products, smart watches pay more attention to the value of the product itself, but also take into account the effect of the user wear, so personally think that the smart watch screen should still be based on the size of the traditional watch, there is no absolute The big screen is good or small, but it should have a relatively reasonable size. For example, men are more suitable for 42mm dial, while women are more suitable for 38mm dial. This classic size has been tested by time. It is also the most classic size of the popular watches. The smartwatch is typical of Apple Watch. The 38mm and 42mm sizes have also been considered by consumers. There are also some special smart watches, such as the sporty Giam Fenix ​​3, which measures 51 mm in size and is more suitable for quick viewing of screen content in outdoor sports. In this case, the screen will naturally be bigger. some. Taken together, daily wear smart watches are still better a