The first place in this week is the "Bidirectional DC-DC-DC Converter Based on STM32". The device uses PID control, the main function is constant current charge charging and constant voltage output. In the charging mode, the DC power supply charges the battery pack constant current charge, 1A to 2A stepping, step in value 0.1a, the control accuracy is less than 1%, the charging efficiency is greater than 90%; the discharge mode, the battery pack constant voltage output 30V drive Load, discharge efficiency is greater than 95%, the control error is less than 0.1V ... I want to know more, the project link is available!
TOP10: Blheli S Electric Tonance Github Source Codes and Circuit Diagrams, etc.
The BLHELI_S electrical tone is based on EFM8BB21F16G and FD6288, and the PCB size is 2.5 cm × 5 cm. Firmware J, verified. The third edition is now updated.
Project Link: https://www.cirmall.com/circuit/9820#/details
Be
TOP9: Blind use ultrasonic glasses, buzzer alarm
Decide to be an engineering project, not an experimental project. I hope to create something beneficial to disabled people in some way. I propose this idea of this glasses, which can help blind people feel that there is an object in front of them that may hit their head. The cane used in walking is used to help them walk on the ground. With Arduino Pro Mini MCU, ultrasonic sensors, and buzzers, these glasses can be made, and they can sense the distance of the front object and a beep, remind people of the object in front of them. Simple and cheap.
Project Link: https://www.cirmall.com/circuit/12725#/details
Be
TOP8: From a netizen homemade JLINK-V9, J-Link-V9.5PCB source file, schematic free sharing
JLINK is used to download a single-chip (typ, such as STM32 series) to support JLINK interface, after installing the JLINK driver and management software, open a JLink ARM in the software, there will be the above menu and option, download The program can be encrypted to the single-chip microcontroller when the program is programmed to prevent others. The main erase, download, and other operations are in the "Target" menu, open the software, there is this menu.
Project link: https://www.cirmall.com/circuit/6402#/details
Be
TOP7: ZVS Zero Voltage Switch Circuit Schematic + PCB Source File
What is ZVS, and the mother is checked for the Zero Voltage Switch. That is, when the switch tube is turned off, the voltage at both ends has been 0 when the switch tube is turned on. The switching loss of this switch can be reduced to the lowest. We usually use the induction cooker and LLC power supplies such a resonant power, and ordinary chargers are hard-driven, which is larger than this resonant power loss. So ZVS can do very efficient, but there is a shortcoming that its adjustment range is generally narrow. For example, induction furnaces, when we transfer power to a larger, we continue to heat; when the power is adjusted, it will begin to be intermittently heated, as it can no longer reach the resonant state at that time. Like our ordinary charger, the hard switch of the hardware, regardless of the no-load and full load, it is sustainable.
Project Link: https://www.cirmall.com/circuit/2183#/details
Be
TOP6: Mini LED Matrix Clock
I use the MAX7219 dot matrix module ICROCONTROLLER four-in-one displays to make my clock, and the clock has many functions:
Basic mode of large numbers; digital scroll and closing the sliding mode of the screen; small numbers with second mode; use text written, such as "12 points"; date display; 12/24 hours option; brightness option; random Clock mode options, change the display mode every few hours; button driver menu for settings and display selections.
Project Link: https://www.cirmall.com/circuit/12769#/details
Be
TOP5: Weather forecast for MQTT ESPWA
ESPWATCH is based on the ESP-12 WiFi module. It can obtain date / time and weather forecasts from the Internet server in a few days, and can remotely control the local instruments such as relays / LED / fans. With this learning, you will get an understanding of the skills of basic components, such as welding / Arduino program / WiFi use / basic HTTP protocol. This is the first step in entering the electronic / programming, is also the easiest step.
Project Link: https://www.cirmall.com/circuit/12744#/details
Be
TOP4: USB turn TTL USB turn serial port DIY production
This USB turn TTL module mainly adopts the PL2303HX chip, 28 foot patch SOIC package, operating frequency is 12MHz, in line with the USB 2.0 communication protocol, can directly convert USB signals into serial port signals, baud rate range from 75 ~ 1228800, 22 kinds of wave The special rate can be selected, and support 5, 6, 7, 8, 16 of 5 data ratios, this module passes multiple complex environment test verification performance stable, first open source all the schematic and PCB source files and BOM tables and PL2303 drivers It is convenient for the majority of industrial control and single-chip fans to make their own DIY.
Project Link: https://www.cirmall.com/circuit/1905#/details
Be
TOP3: STM32F103C8T6 minimum system (schematic + PCB + integrated library + BOM table)
1. Master chip: STM32F103C8T6
2. Board size: 50 * 50mm
3. Onboard resources: a. Minimum system; B.can communication interface; C.JTAG download; d. Power management; E. Two serial port; F.GPIO expansion;
Project Link: https://www.cirmall.com/circuit/7813#/details
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TOP2: Share your own PCB package library (Altium Designer)
Including yourself in a few years, there are 3D display, STM32 series has STM32F103C8, VE, ZE, F105VC, F107VC
In order not to increase trouble, directly open the "libpkg" project after decompression, the schematic package and the PCB package directly correspond to it, if the package is modified, the direct compilation project is good. In order to prevent errors, the 3D model is drawn in the machine 13 Layers, the method of adding 3D models is to open the package, switch to the mechanical layer, put the 3D body, after painting, you can change the color and height.
Project Link: https://www.cirmall.com/circuit/3597#/details
Be
TOP1: Bidirectional DC-DC Converter Based on STM32
The publishing content is undergraduate graduation design. According to the two-way DC-DC converter designed for 15 years, the device uses PID control, the main function is constant current charge and constant voltage output. In the charging mode, the DC power supply charges the battery pack constant current charge, 1A to 2A stepping, step in value 0.1a, the control accuracy is less than 1%, the charging efficiency is greater than 90%; the discharge mode, the battery pack constant voltage output 30V drive Load, discharge efficiency is greater than 95%, the control error is less than 0.1V; in automatic mode, the constant voltage output is 30V, the control error is less than 0.1V.
Project Link: https://www.cirmall.com/circuit/12707#/details
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