Based on AT89S51 digital electronic code lock

Digital electronic combination lock. Based on chip AT89S51. Choose LED to display the results. Contains circuit diagram

Schematic PCB

Smart car (ultrasonic, Bluetooth, infrared)

The smart car based on AT89C82 can realize ultrasonic obstacle avoidance, infrared obstacle avoidance, Bluetooth and infrared remote control car control and automatic tracking.

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (First Prize in Hebei Province)

Schematic PCB

Infrared barrier smart car

It is a good learning material for students studying microcontrollers and smart cars.

Schematic PCB

Protues simulation example (8051)-H type motor drive

Protues simulation example (8051)-H type motor drive

Schematic PCB

Infineon XC866 electric vehicle schematic PCB diagram program

A complete electrical schematic diagram and program for an electric vehicle based on the Infineon XC866 microcontroller. I have tested it on an electric vehicle and it runs normally.

Schematic PCB

2021 Undergraduate Electronic Design Competition G-Title Second Grade Work (Plant Protection Aircraft)

Schematic PCB

Discrete ultrasonic range finder

This program can realize the ultrasonic ranging function, and has functions such as LCD display, serial port output, and changing range.

Schematic PCB

Internet of Things smart home solution-based on Nucleo-STM32L073&Gizhiyun.zip

Using the third-party cloud platform Gizwits, we created an IoT application system based on ultra-low power consumption Nuleo STM32 L073

Schematic PCB

Mini quadcopter KK flight control source code

Mini quadcopter flight control source code program, if you are interested, you can take a look.

Schematic PCB

Open source lab-grade automated microscope

Proteus simulation example (8051)-stepper motor control

Proteus simulation example (8051)-stepper motor control.

Schematic PCB

The second prize source program of the 9th Freescale South China Optoelectronics Group is the program used in the competition without reservation.

It must be 10 points. This is the result of my three months. It is a program for competition. You can download it. If you don’t understand, you can ask.

Schematic PCB

Protues simulation example (8051)-PWM control DC motor

Protues simulation example (8051)-PWM control DC motor

Schematic PCB

Ultrasonic car three-way ultrasonic

Ultrasonic car three-way ultrasonic detection obstacle avoidance obstacle competition dedicated carbon-free car electronic design competition

Schematic PCB

Motor speed measurement (use Hall + magnet or infrared reflection tube + black and white code disk to do this experiment)

Motor speed measurement (use Hall + magnet or infrared reflection tube + black and white code disk to do this experiment)

Schematic PCB

2020 Electronic Competition Question F-Simple non-contact temperature measurement and identification device (Anhui Division)

Schematic PCB

Using single-chip microcomputer AT89C51 to transform ordinary double-tub washing machine

Ordinary double-tub washing machines have a large number of users because of their low price and durability. However, as people's pace of life accelerates, there are many inconveniences when using this kind of washing machine to wash clothes: you need to add water before washing clothes, which takes about 2 to 3 minutes. Many friends can't stand the "torture" of time and go about other things. They often forget to turn off the water, causing a lot of waste. When washing clothes, turning the timer can usually wash for up to 15 minutes. Most users don't do this process. He will stay by the washing machine. When the timer ends, he cannot time the time or rinse again in time. Sometimes he even forgets how long he has been washing, which greatly prolongs the washing time. He cannot leave people while rinsing. Someone must be involved in the whole process. Very inconvenient. This article introduces a method of using the AT89C51 microcontroller to transform an ordinary double-tub washing machine. After the transformation, the entire process of water inlet, washing, rinsing, and drainage can be completed automatically. Multiple washing and rinsing methods can be selected, and single washing, single rinsing, and Manual function, very convenient.

Schematic PCB

NUVOTON Wireless Charging Reference Solution

Schematic PCB

BeanCounter: Simple, battery powered, pocket-sized open source parts counter for 8mm cut tape and partial reels (schematics, source code, etc.)

BeanCounter is a pocket-friendly SMT parts counter. Powered by a CR2032 coin cell battery, it uses two infrared photointerrupters to count parts as quickly as possible. It works with any opaque, 8 mm wide carrier tape up to 2 mm, and it covers most 0805 or smaller LEDs and passives, as well as SOT23 transistors.

Schematic PCB