The circuit of this week has USB to TTL USB to serial port, electromagnetic gun, homemade mini oscilloscope, low-cost electric toothbrush full set of information, switch adapter circuit, multi-output linear regulated power supply, etc., what is the specific circuit, then go to understand Let's go!
TOP 10: Multi-output linear regulated power supply circuit + PCB source file
This document sharing is a small power supply designed. Support voltage multi-channel output. These include ± 12V, ± 5V and other common voltage values. See the attachment content in detail. The attachment content includes multiple output linear regulated power supply schematic and 99 engineering files (including schematic and PCB).
Project Link: https://www.cirmall.com/circuit/2621#/details
TOP 9: Low-cost intelligent electric toothbrush full set of information schematic (including wireless emission and receiving charging schematic)
Full set of information uses ultra-low cost intelligent electric toothbrush (including handle primary control / wireless transmission and receiving charging schematic). Using the microcomputer controller (MCU) to control the output PWM pulse frequency, control the driving sound wave motor, drive the toothbrush head with the vibration of the ultra-high speed frequency, the vibration of the toothbrush head high frequency and the wide swing will produce fluctuation cleanliness, quickly remove the teeth Planeum and bacteria, protect the user's teeth beautiful whitening.
Project Link: https://www.cirmall.com/circuit/13591#/details
TOP 8: Switching power adapter circuit + PCB source file + BOM list, etc.
This document describes the 12V1.5A switching power adapter based on RM6203 designed. The switching power supply circuit is overcurrent, short circuit protection, has been mass produced by 50K, and stability is good.
Project link: https://www.cirmall.com/circuit/2768#/details
TOP 7: STM32-based SX1278 transceiver + schematic, with 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. Compared to traditional modulation technology, Loratm modulation technology also has a significant advantage in anti-blocking and selectivity, and solves the traditional design options that cannot be combined with distance, anti-interference and power consumption.
Project Link: https://www.cirmall.com/circuit/6310#/details
TOP 6: STM32F407 Development Board Official Schematic + Firmware + Routine Details
The STM32F407 development board can interface the STM32F4 Discovery development board. STM32F4Discovery is a Cortex-M4 development board designed for high-performance STM32F4 series. The development board is based on STM32F407VGT6 design. The development board also integrates the ST-LINK / V2 simulation downloader (but only external SWD interfaces), exempt from your additional purchase emulator or downloader. Added an acceleration sensor LIS302DL, digital microphone MP45DT02, speaker driver, and a Micro-AB USB interface.
Project Link: https://www.cirmall.com/circuit/6195#/details
TOP 5: Xiaomi Low Power Smart Watch Project - Based on NRF52832 SX1278 Completed Source Code and Schematic
The MCU has added a lot of new features in a new generation of NRF52832. For example, the core of Cortex-M4F, it is more powerful to operate and floating-point operations. Now there are many wear devices or industrialized equipment that require a built-in very complex algorithm, so you need MCUs to have a faster running speed. This Cortex-M4F core period is 64MHz, which has increased much more than other manufacturers' chips.
Project Link: https://www.cirmall.com/circuit/13620#/details
TOP 4: USB3.0 HUB 1 Drag 4 All Open Source (Schematic, PCB Source File, Firmware Upgrade Software & Firmware, etc.)
Since I need a lot of USB port, I specially made a HUB used. It is a relatively universal VIA VL812. The schematic is to use the official no change. It is still satisfactory that there is no incompatible thing. "Related Documents" simultaneously gives other users to USB3.0 HUB 1 drag 4 Layout, open with PADS9.5.
Project Link: https://www.cirmall.com/circuit/5785#/details
TOP 3: How to make mini oscilloscopes at home using Arduino nano
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.
Project link: https://www.cirmall.com/circuit/13615#/details
TOP 2:14 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!
Project link: https://www.cirmall.com/circuit/7464#/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.
Project Link: https://www.cirmall.com/circuit/1905#/details
Our other product:
