The circuit in this week has ultrasonic rangingmeters, PCB package library, smart watch projects, electromagnetic guns, homemade mini oscilloscopes, STM32 single-chip smart meters wireless WiFi socket, four-axis aircraft, etc., specifically, in the following, you can understand .
TOP 10: (For a) Ultrasonic Rangeter - Reversing Radar Circuit (Schematic and PCB Source File)
The main body is an ultrasonic ranging, using a US-015 ultrasonic module, a maximum range 4M, a precision 0.01m, a DS18B20 temperature sensor as a temperature compensation element, a laser cross, used to locate the ranging target, as a reversing radar, When the distance is less than the set value, the sound is alarm. The entire circuit design is simple and can be implemented with a holeboard. The important circuit modules involved include: STC89C52RC microcontroller, power supply indicator module, 1602 liquid crystal display module, an acoustic alarm module, a DS18B20 temperature sensor module, a US-015 ultrasonic circuit module.
https://www.cirmall.com/circuit/2359#/details
TOP 9: How to use Arduino Nano to make a mini oscilloscope at home
Make your own mini oscilloscope at home. It is easy! In this video, I will show you how to make my mini oscilloscope at home. It is easy. Not my own code, I just do tutorial for you. In order to complete this project, I am using the source code provided by the third party.
https://www.cirmall.com/circuit/13615#/details
TOP 8: STM32-based SX1278 transceiver + schematic, attached to SX1276 official website
The SX1276 / 78 transceiver mainly uses LORATM remote modem for super long distance spreading communication, strong anti-interference, and can minimize current consumption. With the LORATM patent modulation technique of Sundit, SX1276 / 77/78 uses low-cost crystals and materials to obtain high sensitivity of exceeding -148 dBm. In addition, the integration of high sensitivity and + 20dBM power amplifier makes the link budget of these devices reaches the industry leading level, making the best choice for long-distance transmission and high reliability requirements.
https://www.cirmall.com/circuit/6310#/details
TOP 7: Share your own PCB package library (Altium Designer)
Including yourself in a few years, 3D shows, 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.
https://www.cirmall.com/circuit/3597#/details
TOP 6: Xiaomi Low Power Smart Watch Project - Based on NRF52832 SX1278 Completed Source Code and Schematic
Technology: The full set of open source and schematic, suitable for deep development, more suitable for learning research. Notification Center: With the mobile phone with low-power blue tooth real-time connection, phone, WeChat is no longer omission, and you can easily view on your watch. Selfie artifact: Remotely control your phone camera, and you can view the effect on your watch. Long standby: excellent power management, the longest can stand nearly one week. Health Assistant: Sports step, heart-rhythm testing, etc. to make the watch become the best helper.
https://www.cirmall.com/circuit/13620#/details
TOP 5: [Graduation Design] Based on STM32 Single Chip Microcomputer Smart Meter Wireless WiFi Socket APP AC Voltage Current Detection Design
This design consists of STM32 single-chip core board circuit + AC voltage current detection module circuit + WiFi module circuit + indicator circuit. 1. After the voltage transformer Tv1005m and current transformer TA1005M detects AC voltage and AC current values, 2, mobile APP, and WiFi modules, the AC voltage, AC current, power, and electricity display can be displayed on the phone in real time in real time. 3. When the power exceeds 200W, the relay is automatically disconnected. When the power does not exceed 200W, the switch of the relay can be manually controlled. 4, after the mobile phone and WiFi module are connected, the timing is displayed on the phone.
https://www.cirmall.com/circuit/13641#/details
TOP 4:14 level electromagnet circuit diagram, powerful steelmail (new version is about to update)
The electromagnetic main power supply partial circuit diagram, the control section is the same, each section MOS tube is discharged, the main is the parameter of the distance and the distance between the photoelectric switch. Push the object to be operated using electromagnetic force. Rapid moving effect of the object. This data can be 20 levels, usually the 14-level higher level speed is very difficult. Maximum 800m per second. Please do not hurt small animals with electromagnet. Children don't want to play!
https://www.cirmall.com/circuit/7464#/details
TOP 3: Renesa 4-axis aircraft design (remote control board + main control board) all data open source
The four-axis aircraft changes the rotor speed by adjusting the four motor speeds to achieve changes in lift, thereby controlling the attitude and location of the aircraft. Structure, the flight mode of using the four-axis aircraft in this application is X mode, as shown, four motor of the four-axis aircraft, one pair of reverses, make the counter-torque balance in the vertical direction, thereby ensuring The stability of the flight. The four-axis aircraft can be used as aerial photography, toys, etc., which is increasingly common in our lives.
https://www.cirmall.com/circuit/4278#/details
TOP 2: Fingerprint lock full set of information, source program PCBBOM table, production.
This smart lock scheme uses the STM8L052R8T6 single-chip microcomputer to do the master chip, the touch keyboard reaction is fast, with a Hall circuit, which is convenient to make the sliding panel, 0.96 inch OLED display. Standby power consumption is about 50 uA, standby keyboard and fingerprint module wake-up system; 3 ways of password, IC card and fingerprint are unlocked. The motor drive time is automatically adjusted according to the amount of electricity, and the power-on default lock state is prevented from restarting the vulnerability of the Tesla coil high frequency interference circuit.
https://www.cirmall.com/circuit/9910#/details
TOP 1: USB turn TTL USB turn serial port DIY production (schematic + PCB + BOM + PL2303 driver)
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.
https://www.cirmall.com/circuit/1905#/details
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