Graduation project based on the design of automatic flower watering system based on 51 microcontroller (including schematic diagram, source program, thesis, etc.)

Contains all design information

Schematic PCB

Power Optimized 77GHz Liquid Level Transmitter Reference Design

TI Design TIDEP-0091 highlights strategies for power optimization of IWR14xx 76- to 81-GHz mmWave sensors in tank level-probing applications, displacement sensors, 4- to 20-mA sensors, and other low-power applications for detecting range with high accuracy in a minimal power envelope. In these applications, the system often operates on a low-voltage data line that provides less power than the operational power consumption. Duty cycling is critical to reducing the average power to meet the power input restrictions. Power optimization is achieved through MSP432 external duty cycling the IWR14xx device for periodic sensing. Additionally, this TI Design provides a sample configuration for single-dimensional range detection.Read more about fluid-level sensing using 77-GHz millimeter wave (SPYY004).Watch the introduction to level sensing (video). 

Schematic PCB

STW81200 Evaluation Kit

Evaluation Kit for STW81200

Schematic PCB

Motor control circuit for cordless power tools

Schematic PCB

2-phase bipolar stepper motor driver IC——TB6608FNG

The TB6608FNG drives two-phase stepper motors in bipolar mode. It realizes constant current drive through PWM control. The excitation mode can be selected from 2-phase, 1-2 phase, W1-2 phase and 2W1-2 phase mode and the rotation mode direction can be selected from clockwise and counterclockwise. The TB6608FNG only allows simple motor control using a clock signal as an input signal.

Schematic PCB

SIPI-ERM8-ZIPCBL: Zipwire cable assembly

CN0189

Tilt measurements using dual-axis accelerometers

Schematic PCB

Briefly describe the principle and application of DAC0808 (pin functions + examples + schematic diagram + source program)

DAC0808 is an 8-bit analog-to-analog conversion integrated chip with current output, stabilization time of 150ns, and drive voltage of ±5V, 33mW. DAC0808 is directly compatible with TTL, DTL and CMOS logic levels.

Schematic PCB

MAXREFDES1206: PoE-powered device and 24V/1A active-clamped forward DC-DC converter using the MAX5974C and MAX5969B

The MAXREFDES1206 is a Power over Ethernet (PoE) powered device and active clamp forward converter that delivers up to 1A at 24V from a 39V to 57V supply voltage.

Schematic PCB

TJA1128EVB: TJA1128 LIN mini system base chip evaluation board

Schematic PCB

Epidemic development monitor based on ESP8266

Alan Wang, a maker from Taiwan, used the MAX7219 LED module, the ESP8266-based D1 micro development board and MicroPython to develop a small tool that can update COVID-19 data in various countries in real time.

Schematic PCB

AC current measurement system based on STM32 (program, circuit information)

The overall structure of this design is roughly composed of a main control module, a current signal sampling module, a power module and a serial port output module. In this article, the main control chip uses a microcontroller model STM32F103RC, which makes the structure as small as possible while ensuring the current sampling accuracy. It is as simple as possible, avoids complex and changeable circuit layout, is more convenient for PCB board production, and is relatively low-cost. Among them, in the design of the sampling conditioning circuit, a current transformer is used to sample the current signal.

Schematic PCB

CN0237

Ultra-low power, 18-bit, differential PulSAR ADC driver

Schematic PCB

400 W / 1.6-54 MHz reference design using 2x SD2933

400 W / 1.6 - 54 MHz reference design using 2x SD2933

Schematic PCB

Design and production based on lithium battery charger_with schematic diagram and PCB

Since my four-wheel drive robot is powered by a 16.5V lithium battery, and there is no charger for this battery on the market, I am very confused about charging it. In desperation, we designed a portable and simple lithium battery charger. Solve the trouble of charging. The charger can output an adjustable charging current of 100mA-1A. The input voltage is VIN>18V, and it can be charged with the 19V voltage on the laptop. Charging time is generally determined according to the size of the charging output current.

Schematic PCB

CW_TAP: CodeWarrior ^® TAP

Satellite GPS path recorder based on STM32 (with complete source code)

Satellite GPS path recorder based on STM32 (complete source code attached).

Schematic PCB

MPC5748G Secure Ethernet Gateway Reference Design

Reference design designed to provide A-sample Ethernet gateway ECU (based on 32-bit Power Architecture)

Schematic PCB

STM32 Nucleo package for IO-Link master with IO-Link v1.1 PHY and stack

STM32 Nucleo Kit of IO-Link Masters with IO-Link v1.1 physical layer and stack

Schematic PCB

Power Line Communications AC Coupled Circuit

Power line communication AC coupling circuit

Schematic PCB