Ultrasonic ranging circuit based on smart car (with engineering circuit diagram attached)

It uses the 80C51 microcontroller as the control core, uses ultrasonic sensors to detect obstacles on the road, controls the electric car's automatic obstacle avoidance, fast and slow driving, and automatic parking. It can also automatically record time, mileage and speed, and automatically track and light search. Function. The entire system has a simple circuit structure and high reliability and performance. (Attached is the original engineering circuit diagram)

Schematic PCB

Wireless infrared transmitter and receiver circuit diagram + schematic diagram and PCB.rar

Wireless infrared transmitter and receiver circuit diagram + schematic and PCB

Schematic PCB

[Example] Xilinx FIR filter based on distributed algorithm [including code files]

An example of a distributed algorithm FIR filter based on simulink, system generator for DSP, Xilinx ISE and hardware co-simulation. The included files include m files and vhdl files and a word explanation. Friends in need can take a look.

Schematic PCB

USB implementation based on FPGA (including introduction/program/schematic diagram)

USB implementation based on FPGA (including introduction/program/schematic diagram)

Schematic PCB

Video acquisition circuit schematic and layout based on DSP and FPGA (Protel99SE format)

Video acquisition circuit schematic and layout based on DSP and FPGA (Protel99SE format)

Schematic PCB

16th-order FIR filter based on DA algorithm (verilog source program)

The first 16-order serial DA algorithm FIR filter written in Verilog, with instructions, modelsim and MATLAB simulation and Quartus synthesis.

Schematic PCB

Single-chip wireless dual-display answering machine based on AT89S51 (with papers, circuit diagrams, and C language programs)

This design is a system built using AT98C51 microcontroller. The wireless answering terminal uses a combination of PT2262 transmit encoding chip + F05P transmit module (including thesis description, circuit diagram, and C program are complete)

Schematic PCB

LCD digital clock program and circuit diagram based on 51 microcontroller, which can measure temperature, with infrared remote control, and 1602 large character display program

This is a tutorial for a multifunctional digital clock, with circuit diagram and program. This clock is based on the 51 microcontroller and can measure temperature. It also has two display modes: holographic and stunning LCD large characters. The infrared remote control is only used to switch display modes. It is also suitable for beginners of infrared remote control.

Schematic PCB

Circuit drawing-ic card reader PCB diagram (including schematic diagram and reading program

Circuit drawing-ic card reader PCB diagram (including schematic diagram and reading program)

Schematic PCB

Design principle diagram of wireless sensor network node based on microcontroller and ZIGBEE protocol

Based on the MSP430 microcontroller and CC2420ZIGBEE protocol wireless sensor network node design schematic, including the required chip pin diagram and detailed introduction, there is a circuit design schematic diagram

Schematic PCB

ATmega16 and LCD display (schematic diagram, original program (C language))

This resource includes: 1. Schematic diagram of the ATmega16 experimental board (including: LCD1602 and LCD12864 circuits, RS232 communication, digital tube display, etc.); 2. Chinese information on LCD1602, LCD12864 and ATmega16; 3. LCD1602 and LCD12864 displays based on ATmega16 Among the source codes, LCD12864 is a left and right dual screen display. Note: The LCD12864 in the schematic part does not support split-screen display, but don't worry, it also has 20 pins, including 2 spare pins. Please refer to the information on LCD12864 I gave you. Just connect the two chip select signals CS1 and CS2 is connected to the I/O of ATmega16 to implement chip select to achieve split-screen display. The resources are a bit too much, but it’s worth it! ! ! !

Schematic PCB

Audio power amplifier schematic and PCB (based on TDI1521)

Audio power amplifier schematic diagram and PCB. The PCB board made of photosensitive board is quite beautiful (with pictures)

Schematic PCB

Programmable operational amplifier (schematic diagram, pcb, source program, physical object, simulation)

The programmable gain operational amplifier, which took two days to make, was taken out to show off. Required components: CD466 89C51 UA741 Power supply voltage: +5V, -5V Magnification: 1, 20, 30, 50 times. Input signal voltage: 10mV (20 times) -150mV (50 times). Frequency response: 10Hz-10KHz Attachment: The compressed file contains schematic diagram, pcb, source program and simulation.

Schematic PCB

51 Make a perpetual calendar (schematic diagram, program)

51 Make a perpetual calendar (schematic diagram, program)

Schematic PCB

STM32 source code project, schematic diagram, PCB file, CAN UART SPI-Flash power supply four-state input detection unit

This is actually only adjusted to the preliminary PCB that can run the UART. The others have not been actually debugged. However, if it is useful, friends can refer to the design and PCB. Because it is not fully debugged, the source code project has some redundant code and project files. It needs to be reorganized. Of course, if the board is useful, you can actually build your own project based on the principle. The compressed package contains a complete SCH and PCB, including power supply 5V, 3.3V, RS232, RS485, CAN, SPI-Flash, USB, and IO circuits.

Schematic PCB

LED dot matrix writing screen (contains PROTEUS files, PROTEL schematic diagram, PCB, assembly program)

The structure of the LED dot matrix writing screen system is shown in Figure 1. Under the management of the controller, the LED dot matrix module display screen works in the scanning micro-brightness mode that is imperceptible to the human eye and the display lighting mode that is visible to the human eye; when the light pen touches the surface of the LED dot matrix module, the touch position is first detected by the light pen The LED point at the position is scanned and dimly lit to obtain its row and column coordinates, and then based on the functional requirements, it is decided whether the LED at the coordinate is lit to a display state visible to the human eye (as shown in Figure 1, the deep red LED point at the point where the light pen is touched has been lit) ), thereby realizing writing display functions such as "lighting, stroking, inverting, entire screen erasing, stroke erasing, continuous writing of multiple words, and object dragging" on the screen.

Schematic PCB

AT89S51 electronic clock design (schematic + PCB + LCD)

AT89S51 electronic clock design (schematic + PCB + LCD)

Schematic PCB

Design of dual-tone doorbell circuit based on 555 timer

Design of dual-tone doorbell circuit based on 555 timer

Schematic PCB

Design of motor speed measurement system based on microcontroller (defense version) complete graduation thesis with pictures and source program

This design mainly uses AT89C51 as the control core, which is composed of Hall sensor, LED digital picture tube, HIN232CPE level conversion, and RS232. The measurement speed system of the microcontroller and the serial communication between the PC and the microcontroller are introduced in detail. Give full play to the performance of the microcontroller. The focus of this article is to measure the speed and display it on the 5-digit LED digital tube.

Schematic PCB

Stepper motor control based on 51 microcontroller - design report (instruction manual) and source program

Stepper motor control based on 51 microcontroller

Schematic PCB