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ESP8266 Activated Carbon Formaldehyde Removal Main Control Board

Overview

Activated carbon is used to adsorb formaldehyde, the outer shell is made by 3D printing, the PCB is made by JLCPCB, a centrifugal fan with high air pressure is used, the ESP8266 is connected to the network, and the Blinker can be remotely controlled and historical formaldehyde concentration can be viewed. The total cost is estimated at 90 yuan.
Please see the video on Bilibili: https://www.bilibili.com/video/BV1aapieMEst/ Overview:
https://www.bilibili.com/video/BV1hapieTE1L/ Hardware Introduction
: https://www.bilibili.com/video/BV1TE4zeEERW/ Software Introduction:

ESP8266 main controller,

CJSH22 formaldehyde sensor: https://detail.tmall.com/item.htm?_u=k3v6gk0837d&id=609585259969&skuId=4884397220013&spm=a1z09.2.0.0.57172e8dZZ7wus

The screen uses an IIC. 12864

motor for automotive blowers with fan: https://item.taobao.com/item.htm?_u=k3v6gk01cae&id=612166551562&spm=a1z09.2.0.0.57172e8dZZ7wus

3.3V to 5V PWM chip: https://item.taobao.com/item.htm?_u=k3v6gk06122&id=636691499892&spm=a1z09.2.0.0.57172e8dZZ7wus

Activated carbon filter housing for stainless steel window screens:

Approximately 2.5 kg of activated carbon is needed based on my designed dimensions.

Blinker for mobile app: https://www.diandeng.tech/doc

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daima.ino

STL model.rar

SW model.rar

PDF_ESP8266 Activated Carbon Formaldehyde Removal Control Board.zip

Altium_ESP8266 Activated Carbon Formaldehyde Removal Control Board.zip

PADS_ESP8266 Activated Carbon Formaldehyde Removal Control Board.zip

BOM_ESP8266 Activated Carbon Formaldehyde Removal Main Control Board.xlsx

91709

SULILG 32-bit single-unit ESC

A single-unit ESC based on AM32 and HF32 (supports 8-bit switching)

The test video and attached
project parameters

are available. This solution separates the control board and power board, which can increase overcurrent. Users can freely choose to use an 8-bit or 32-bit control board.
AM and HF use the PB4 pin scheme, which is widely available online. BL_S uses the J_H_30 scheme, which is also widely available online.
This ESC supports 5V 3ABEC and can power peripherals.
This ESC uses 12 MOSFETs to increase heat dissipation and overcurrent. For NMOS transistor selection, you can use NTMFS5C430NLT1G or CSD18540Q5B, depending on your choice. As long as the voltage is >30V and the overcurrent is greater than about 80, it is acceptable.

In the 6-second voltage test, this ESC with a copper thickness of 0.5OZ can achieve around 20A and a temperature of 40-50 degrees Celsius. Under forced cooling, it can run at 50A for 30 seconds and reach a temperature of 80 degrees Celsius (increasing the copper thickness can provide better heat dissipation and overcurrent performance, or you can add a heatsink).

Rendering and

physical images are also available.

SULILG 32-bit Single-Unit ESC Test_1.mp4

SULILG 32-bit Single-Unit ESC Test_2.mp4

ESC data.rar

PDF_SULILG32-bit Single-Unit ESC.zip

Altium_SULILG32-bit single-unit ESC.zip

PADS_SULILG 32-bit single-unit ESC.zip

91710

Photoelectric obstacle avoidance device

Photoelectric obstacle avoidance module, used for obstacle avoidance in small vehicles.

The schematic diagram is as follows:
1. One set of LM393 operational amplifiers is used, and the other set is unused.
2. The adjustable resistor can adjust the distance between the amplifier and the obstacle.
3. The circuit diagram is as follows:

4. The physical diagram is as follows:

PDF_Optical Obstacle Avoidance Device.zip

Altium_Optical Obstacle Avoider.zip

PADS_Optical Obstacle Avoider.zip

BOM_6. Photoelectric Obstacle Avoidance Device.xlsx

91711

Microsoft Dinosaur

Free toy dinosaur, can be scratched to look like gold!

Free dinosaur charm, can be stamped with gold!
A super cute Microsoft dinosaur charm, perfect as a pendant or necklace!

PDF_Microsoft Little Dinosaur.zip

Altium_Microsoft Little Dinosaur.zip

PADS_Microsoft Little Dinosaur.zip

91712

electronic

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-26 00:58:13

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