Smart Fan and Power Expansion Board - Revision history

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2026-05-27T02:13:23Z

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Admin: Add {{Deprecated}} template

2026-04-30T03:13:31Z

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← Older revision		Revision as of 11:13, 30 April 2026
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	[[File:Smart-fan-diagram-w800.jpg\|right\|thumb\|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]		[[File:Smart-fan-diagram-w800.jpg\|right\|thumb\|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
	{{GD Template Impl}}		{{GD Template Impl}}

Harry at 10:24, 29 April 2026

2026-04-29T10:24:14Z

← Older revision		Revision as of 18:24, 29 April 2026
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	</pre>		</pre>
	Download it: [[File:smartfan.zip]]		Download it: [[File:smartfan.zip]]

	~~or:~~
	~~wget http://raspberrypiwiki.com/download/battery-fan-board/smartfan.py~~

	== SAMPLE CODE 3 ==		== SAMPLE CODE 3 ==

Harry at 10:04, 29 April 2026

2026-04-29T10:04:34Z

← Older revision		Revision as of 18:04, 29 April 2026
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	Download it: [[File:Out1-onoff.zip]]		Download it: [[File:Out1-onoff.zip]]

	or
	~~wget http://raspberrypiwiki.com/download/battery-fan-board/out1-onoff.py~~

	Run this sample code, if you can found the out1 led turns on, after 10 seconds, out1 led turns off, in turn.		Run this sample code, if you can found the out1 led turns on, after 10 seconds, out1 led turns off, in turn.

Harry at 10:03, 29 April 2026

2026-04-29T10:03:54Z

← Older revision		Revision as of 18:03, 29 April 2026
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	2. Output: DC 5V 4A with two channel outputs:		2. Output: DC 5V 4A with two channel outputs:
	OUT1 for external device such as servo, motor, robots, mechanical arm, intelligent card etc. (output interface: HT3.96);		OUT1 for external device such as servo, motor, robots, mechanical arm, intelligent card etc. (output interface: HT3.96);
	Max current is 2A, and can be programming control to on/off; please refer to [[~~Smart Battery Fan Board~~#SAMPLE CODE 1 \|SAMPLE CODE 1]];		Max current is 2A, and can be programming control to on/off; please refer to [[#SAMPLE CODE 1 \|SAMPLE CODE 1]];
	OUT2 (GPIO output for raspberry pi);Max current is up to 4A if the OUT1 be closed;		OUT2 (GPIO output for raspberry pi);Max current is up to 4A if the OUT1 be closed;
	CAN'T be programming control, it will be output to raspberry pi directly if the switch be turned on;		CAN'T be programming control, it will be output to raspberry pi directly if the switch be turned on;

	3. Built-in temperature sensor, with active cooling fan, you can control flexibly the ON/OFF of mini fan via I2C command and GPIO programming. please refer to [[~~Smart Battery Fan Board~~#SAMPLE CODE 2 \|SAMPLE CODE 2]];		3. Built-in temperature sensor, with active cooling fan, you can control flexibly the ON/OFF of mini fan via I2C command and GPIO programming. please refer to [[#SAMPLE CODE 2 \|SAMPLE CODE 2]];

	4. Support hardware pwm to control fan, please refer to [[~~Smart Battery Fan Board~~#SAMPLE CODE 3 \|SAMPLE CODE 3]];		4. Support hardware pwm to control fan, please refer to [[#SAMPLE CODE 3 \|SAMPLE CODE 3]];

	Temperature range and accuracy		Temperature range and accuracy
Line 28:		Line 28:
	* -55 ℃ ~ +125 ℃ when the ± 3 ℃		* -55 ℃ ~ +125 ℃ when the ± 3 ℃

	5. Cooling Fan can be replaced, please refer to [[~~Smart Battery Fan Board~~#FAN SPECIFICATIONS \|FAN SPECIFICATIONS]];		5. Cooling Fan can be replaced, please refer to [[#FAN SPECIFICATIONS \|FAN SPECIFICATIONS]];

	6. Standard HAT size;		6. Standard HAT size;

Admin at 08:33, 1 September 2018

2018-09-01T08:33:28Z

New page

[[File:Smart-fan-diagram-w800.jpg|right|thumb|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
{{GD Template Impl}}
[[File:smart-fan-IMG-2000-main.jpg|thumb|right|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
[[File:smart-fan-2004-w800.jpg|right|thumb|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
[[File:smart-fan-2010-W800.jpg|right|thumb|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
[[File:Sku-465240-IMG-2077.jpg|thumb|right|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
[[File:sku-465240-IMG-2080-W1200.jpg|thumb|right|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]
[[File:Sku-465240-IMG-2078.jpg|thumb|right|Raspberry Pi Smart Fan and Power Expansion Board sku:464657]]

== Overview ==
Smart Fan and Power Expansion Board

== Features ==
1. Width voltage input: 6V~14V' With power switch

2. Output: DC 5V 4A with two channel outputs:
OUT1 for external device such as servo, motor, robots, mechanical arm, intelligent card etc. (output interface: HT3.96);
Max current is 2A, and can be programming control to on/off; please refer to [[Smart Battery Fan Board#SAMPLE CODE 1 |SAMPLE CODE 1]];
OUT2 (GPIO output for raspberry pi);Max current is up to 4A if the OUT1 be closed;
CAN'T be programming control, it will be output to raspberry pi directly if the switch be turned on;

3. Built-in temperature sensor, with active cooling fan, you can control flexibly the ON/OFF of mini fan via I2C command and GPIO programming. please refer to [[Smart Battery Fan Board#SAMPLE CODE 2 |SAMPLE CODE 2]];

4. Support hardware pwm to control fan, please refer to [[Smart Battery Fan Board#SAMPLE CODE 3 |SAMPLE CODE 3]];

Temperature range and accuracy
* -25 ℃ ~ + 100 ℃ when the ± 2 ℃
* -55 ℃ ~ +125 ℃ when the ± 3 ℃

5. Cooling Fan can be replaced, please refer to [[Smart Battery Fan Board#FAN SPECIFICATIONS |FAN SPECIFICATIONS]];

6. Standard HAT size;

== Packing List ==
* 1 x Board;
* 1 x Mini fan (with install screws)

== SAMPLE CODE 1 ==
<pre>
#demonstrates how to control the output of OUT1
import RPi.GPIO as GPIO
import time

GPIO_PIN = 27

GPIO.setmode(GPIO.BCM)
GPIO.setup(GPIO_PIN, GPIO.OUT)
GPIO.setwarnings(False)
while True:
#turn on the power output, LED is on
GPIO.output(GPIO_PIN,GPIO.HIGH)
print "Turn on the power output"
time.sleep(10)
#turn off the power output, LED is off
GPIO.output(GPIO_PIN,GPIO.LOW)
print "Turn off the power output"
time.sleep(10)
</pre>

Download it: [[File:Out1-onoff.zip]]

or
wget http://raspberrypiwiki.com/download/battery-fan-board/out1-onoff.py

Run this sample code, if you can found the out1 led turns on, after 10 seconds, out1 led turns off, in turn.

== SAMPLE CODE 2==
<pre>
#coding=utf-8

import RPi.GPIO as GPIO
import struct
import smbus
import sys
import time
import os

Sensor_ADDRESS = 0x48

#Set global alert temperature;
ALERT_CON_TEMPERATURE = 36

#Set global CPU temperature
ALERT_CPU_TEMPERATURE = 70

TEMP_REGISTER = 0
CONF_REGISTER = 1
#THYST_REGISTER = 2
#TOS_REGISTER = 3

#CONF_SHUTDOWN = 0
#CONF_OS_COMP_INT = 1
#CONF_OS_POL = 2
#CONF_OS_F_QUE = 3

GPIO_PIN = 12
g_on = False

def regdata2float (regdata):
return (regdata / 32.0) / 8.0

def toFah(temp):
return (temp * (9.0/5.0)) + 32.0

def setAlertTemp():
g_bus.write_byte_data(Sensor_ADDRESS,TEMP_REGISTER,ALERT_CON_TEMPERATURE)

def clearAlert():
g_bus.write_byte_data(Sensor_ADDRESS,CONF_REGISTER,0x00)

#Initialize the sensor and others.
def init():
GPIO.setmode(GPIO.BCM)
GPIO.setup(GPIO_PIN, GPIO.OUT)
GPIO.setwarnings(False)
setAlertTemp()
clearAlert()

def getTemp(self):
#msg = "Reads the temp from the sensor";
raw = g_bus.read_word_data(Sensor_ADDRESS, TEMP_REGISTER) & 0xFFFF
raw = ((raw << 8) & 0xFF00) + (raw >> 8)
ret = regdata2float(raw)
print "Current condition temperature is ", ret, "℃", "[", ALERT_CON_TEMPERATURE,"℃]"
return ret

def getCPUtemp():
cTemp = os.popen('vcgencmd measure_temp').readline()
ret = float(cTemp.replace("temp=","").replace("'C\n",""))
print "Current CPU temperature is ", ret, "℃", "[", ALERT_CPU_TEMPERATURE,"℃]"
return ret

def checkTemperature():
return (getTemp(g_bus) > ALERT_CON_TEMPERATURE) or (getCPUtemp() > ALERT_CPU_TEMPERATURE)

def setFan(need_to_open):
#turn on the fan
global g_on
if (g_on and need_to_open) :
return

if (g_on == False and need_to_open == False) :
return

if need_to_open :
if g_on == False :
print "starup fan!"
GPIO.output(GPIO_PIN,GPIO.LOW)
g_on = True
else:
if g_on :
print "Stop fan!"
GPIO.output(GPIO_PIN,GPIO.HIGH)
g_on = False

g_bus = smbus.SMBus(1)
init()
while True:
print "------------------"
print time.strftime("[%Y-%m-%d %H:%M:%S] ", time.localtime())
setFan(checkTemperature())
time.sleep(3);
</pre>
Download it: [[File:smartfan.zip]]

or:
wget http://raspberrypiwiki.com/download/battery-fan-board/smartfan.py

== SAMPLE CODE 3 ==
[[File:Samplecode3.zip]]

== FAN SPECIFICATIONS ==
Side length is 30mm;

Thickness is 7mm;

PS: the thickness is not more 8mm;

== Matching Acrylic Case ==
[[File:Sku-465240-IMG-2077.jpg|600px]]

[[File:Sku-465240-IMG-2087-1.jpg|600px]]

[[Category:Product Manual]]
[[Category:Raspberry pi]]
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