[Solicitation Order] t12 soldering iron

Introduction: T12 soldering iron

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(verified)BilClock

Introduction: A small TV made with a 0.96-inch OLED screen, which can display the time, number of fans of Station B and countdown.

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[Internet of Things] Hongmeng Smart WIFI Switch +4212046A

Introduction: Use Hongmeng HI3861 chip combined with servo to realize switch control at home or dormitory

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espWatch4.1

Introduction: Small watch made using ESP8266-12f

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0.96_OLED small TV

Introduction: Small TV

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Arduino Development Board

Introduction: Arduino development board

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ESPMonitor_Plus

Introduction: ESP32S3 master control, cooperates with AIDA64, and combines with AIDA64InfoReader host computer to monitor computer operating status, weather forecast, indoor temperature and humidity detection, calendar, epidemic big data, news hot spots, and high-end atmospheric homepage in real time. The firmware is updated from time to time to launch new functions.

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【Call for submission】PS2 interface keyboard and mouse to Bluetooth

Introduction: Use esp32-c3 module or esp32-s module to convert ps2 keyboard and mouse to bluetooth keyboard and mouse

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CH340-ESP series fast programmer

Introduction: USB automatically burns esp series chips, pin headers or test pins can be used

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ESP8266 heating stage

Introduction: EPS8266 400W upgraded heating table

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3D printer WiFi SD card large card 8266

Introduction: WIFI SD card for 3D printer, passed the large card test

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3D printer WIFI SD card small card

Introduction: WIFI SD card for 3D printer, small card has not been tested yet

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ES2Eds3 ESP32S3 WiFi Development Board

Introduction: Based on ESP32S3 WiFi development board, onboard OTG and UART, automatic download, DCDC, ESP32 S3

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Ruler 20cm

Introduction: Combining multiple open source rulers, infringement links are deleted. I don’t know why it can’t be reviewed, but I think it’s okay.

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Sakura Doll NFC pendant

Introduction: Sakura Doll NFC pendant

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Xianyu 1.2VFD screen clock network time correction

Introduction: This clock is made with Xianyu 1.2 yuan VFD screen.

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Loli 6 channel receiver

Introduction: A program based on Loli open source is transplanted to STC8G1K08 microcontroller

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ELRS receiver

Introduction: elrs model aircraft receiver
high refresh rate long-distance sx1280 module
2.4GHz ExpressLRS Lora
Betaflight
Inav traversing machine Fpv
power supply uses two LDOs to supply power separately to improve stability

Schematic PCB

Ultrasonic nebulizer (based on NE555)

Introduction: You can find a lot of relevant principles on Baidu, so I won’t go into details here.
Please see the BOM table for device selection. The piezoelectric ceramics were bought on Taobao with a center frequency of 113KHz.
Frequency adjustment is achieved by adjusting the potentiometer. Be careful not to touch the working piezoelectric ceramics with your hands.

Schematic PCB

Low cost NTP network clock

Introduction: Low-cost NTP clock produced using esp-01s, 0.56 4-bit common anode digital tube, and TM1637

Schematic PCB