Discussion in "Project Doubts" started by    seoulmak    Jul 14, 2015.
Tue Jul 14 2015, 08:20 AM
#1
i would like to ask the input signal,if the project is used to count the motor frequency,

how can i connect the 3pin or 4pin fan to the 8051.

thanks alot.

KM


[ Edited Tue Jul 14 2015, 09:42 AM ]
Wed Jul 15 2015, 05:42 PM
#2
Is this a project listed on this site ?
Fri Jul 17 2015, 08:41 AM
#3
yes, but i need more information to connect the fan. and the project also including feedback(frequency count) to monitor the rpm.

thanks alot.
Mon Jul 20 2015, 04:41 AM
#4
I am assuming you're talking about the small CPU fan. You cannot measure RPM of 3-Pin fan but you can measure RPM of 4-Pin CPU fan as it has sense signal which gives pulse output to measure RPM. The sense signal goes into the frequency counter. Please do check the voltage of the signal before connecting it to MCU directly.
http://www.allpinouts.org/index.php/Motherboard_%28CPU%29_4_Pin_Fan
 seoulmak like this.
Thu Jul 23 2015, 08:14 PM
#5
Try this link.
Basically find the tacho output pin and connect it to the input of the micro.
Add a pullup resistor to the micro's supply voltage (3 or 5 volts) of about 2.2k

http://pcbheaven.com/wikipages/How_PC_Fans_Work/


[ Edited Thu Jul 23 2015, 08:16 PM ]

Get Social

Information

Powered by e107 Forum System

Conversation

Fri Apr 09 2021, 02:02 PM
Hong
Quality articles is the secret to interest the users to visit the site, that's what this web page is providing. christian dating sites https://datingsitesww.com
Fri Apr 09 2021, 03:53 AM
QGWIJ38V49HEBD3WXF www.web.de
I have a small question for you
Thu Apr 08 2021, 06:26 PM
Lilly
Post writing is also a fun, if you be familiar with afterward you can write otherwise it is complex to write. dating sim https://onlinedatingtind.com/
Thu Apr 08 2021, 12:35 PM
Fredericka Horn
Thanks, Fredericka Horn
Thu Apr 08 2021, 12:03 PM
Ronaldwhits
https://coin2x.org

Downloads

Comments

Mirza123
Thu Jun 25 2020, 03:46 PM
eunicelove124
Mon Jun 22 2020, 03:03 PM
cerouno
Tue Jun 16 2020, 05:10 PM
Marce
Sat Jun 13 2020, 09:43 PM
Davidthils
Thu May 21 2020, 12:44 PM
Jakeror
Thu May 21 2020, 01:28 AM
motorCar
Wed May 20 2020, 07:05 PM
Vordrync
Wed May 20 2020, 11:52 AM

Online

Guests: 93, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38215
Newest member: Mirza123