gV6wMb

Portable fan

Overview

This portable, rechargeable fan features three speed settings and is powered by one or two 18650 batteries. It uses the LP78070F motor driver chip. It has five LEDs, three speed indicator lights, two charging indicator lights, and two touch buttons: one for speed switching and the other for reset. The power supply and motor interface use a 2mm pitch PH2.0 female connector for easy connection and maintenance.

The overall structure was modeled in AutoCAD and manufactured using a 3D printer with PLA filaments. Two motor base models are available: a flat-bottomed brushless motor base and a standard 130 motor base.

The 3D-printed fan blades were too rough, so they were purchased from Taobao; the default blades are 100mm in diameter with a 2mm aperture.
The 18650 battery holder is built-in using a model and connects to the battery using 18.5*16.5mm spring contacts. The two batteries are connected in parallel, allowing for the use of one or two batteries.

Design Files

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.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2026-03-27 23:58:11

About TCL548
Are the REF+ and REF- of the AD conversion chip used to determine the maximum and minimum voltages of the AD conversion?
Communication Problems between PLC485 Port and MCU Serial Port
PLC485 port, MCU USART port, computer U-to-serial port, the computer communicates with the MCU USART port through U-to-serial port without any problem; PLC485 port communicates with the computer U-to-
Introduction to the ports of MSP430 microcontroller
The ports of MSP430 are P1, P2, P3, P4, P5, P6, S and COM (different models contain different ports, such as MSP430X11X series only have P1 and P2 ports, while MSP430X4XX series contains all the above
STM32 DMA sends interrupts and receives serial port programs ------- I am a novice
I'm a newbie, I really want to get started, please help me
Capture circuit for rising edge (code)
A simple rising edge detection code: reg RS_r1,RS_r2; always @ (posedge CLKIN or posedge RESET)if(RESET)RS_r1elseRS_r1 always @ (posedge CLKIN or posedge RESET)if(RESET)RS_r2elseRS_r2wire pos_RS = RS_
About down_interruptible function
if(down_interruptible(&dev->sem)) return -ERESTARTSYS; dev->sem is a semaphore used to implement mutual exclusion. What do these two lines of code mean? Because down_interruptible normally returns 0,

Datasheet More

Circuits More