ZfWEwyxJ4

Topzhu A1/A1mini Series Fan Expansion Board

Overview

This is an expansion board for the extruder cooling fan interface of the A1/A1mini. It can separate the hot-end fan's wiring to power an additional fan.
You only need a 5V two-wire fan (for three-wire or four-wire fans, you need to remove the wires except VCC/GND).
The board comes in two versions: a speed-enhancing version that can double the speed of the hot-end fan. The hot-end fan of the Tuozhu A1 series only runs at 30% speed; using the speed-enhancing version will double the speed.
Regardless of whether it's speed-enhancing or not, the control strategy for the additional fan is "once the hot-end fan starts, it runs at full power." Therefore, when choosing a fan, please select one with good dynamic balance, minimal noise and vibration, and use foam adhesive to attach the fan to the extruder to reduce the impact of fan vibration on print quality.
I have designed a mounting bracket for a 4cm fan, which can be downloaded from Tuozhu MakerWorld.
Please note that this project is prohibited from commercial use. You can use it yourself, but you cannot sell it! If you really want to sell it, please contact me for commercial permission! Please do not use it for commercial purposes without permission! !

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:2026-03-26 15:59:41

About interrupts
If the global interrupt is turned on in the function, and the serial port receiving interrupt is turned on, what will happen if there is no specific function receiving interrupt function? I found that
Introduction to EEWORLD University Credit Honor Roll
[font=微软雅黑][size=4][color=#000000]In order to encourage everyone's passion for learning, EEWORLD University Hall has launched the "Credit Honor Roll" column. You can get credits by studying courses. A
The module function address of driverlib.a solidified in ROM
[align=left][color=#000][size=14px][size=4]In the driverlib/rom.h file, the mapping main table address is defined, such as [/size][/size][/color][/align][align=left][color=#000][size=14px][size=4]#def
C language learning suggestions
The most important thing for beginners is to learn how to solve problems. Ideas are the most important here. Getting simple answers is actually not good for your growth. Beginners should seek to catch
I always feel embarrassed and confused when I reach middle age.
Age is not a problem, but I don’t know where my goal is. I feel that my life has no depth. I have forgotten my original intention without realizing it. It’s terrible. Let me sigh and continue coding!
Will the listbox redraw the window once a scroll bar appears?
I am developing a GUI under WIN32. I used SendMessage(hwndList,LB_ADDSTRING,0,(LPARAM)"1") to loop and add strings to a list box several times. I found that as long as I make the list box have a scrol

Datasheet More

Circuits More