In Progress

Temperature Fan Controller with Sleep Mode

We need a circuit designed that will allow us to control 3, 12vdc, 4 wire PWM fans using a minimum of 20KHz frequency. If needed, sample fans will be supplied for testing. The circuit must have a thermistor to allow temperature sensing, a potentiometer to set a minimum fan speed, another potentiometer to set low temperature at which to allow the control to shut the fans off until another potentiometer setting for the temperature that will again actuate the fans.

The circuit should allow a LED to illuminate when power is connected similar to the LED on DVD players and the like. Upon powering on, that LED (presumed RED in color) will turn off and another LED (presumed GREEN) will illuminate. The GREEN LED will continue to be illuminated during sleep mode but flashing intermittently to indicate it is in fact in sleep mode.

It will also be required of the system to remember it's settings and resume it's last operation after an unplanned or accidental power outage.

The circuit should be able to be manufactured using as many surface devices as possible, although if using a PIC micro controller that device would be socketed.

Skills: Electronics, Microcontroller

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About the Employer:
( 1 review ) Newtown, United States

Project ID: #545836

Awarded to:

NaliHetti

Please check the PM

$450 USD in 25 days
(4 Reviews)
4.3

32 freelancers are bidding on average $503 for this job

geobabu

Hi, We can provide you an efficient solution which meet your exact requirement. We have a team experienced in the embedded design field .Interested to hear more from you regarding this project. Regards, Geo

$400 USD in 30 days
(5 Reviews)
4.8
stemtechnologies

We can do the Hardware and the software for controlling the fans. Our Deliverables are Schmatics Design, Layout Gerbers and the embedded Software Code. Please read the PM for more details Regards Somasundaram.I

$1000 USD in 60 days
(1 Review)
4.4
am10riz

Hi, I am an Electronic engineer interested in this project because I am capable of doing it in the time [url removed, login to view] for a positive [url removed, login to view]

$300 USD in 5 days
(4 Reviews)
3.0
nroxi

Hi ! Please read my PM

$250 USD in 3 days
(1 Review)
2.4
CatCoders

Please check the PM I sent you.

$710 USD in 10 days
(0 Reviews)
0.0
miladinoski

I can do this project exactly as you want. If you have other requirements we can find an appropriate solution. Please contact me, we can do any agreement.

$350 USD in 10 days
(0 Reviews)
0.0
techss

pls see pm for details

$250 USD in 20 days
(0 Reviews)
0.0
outsolder

Price includes all design files, and 1 working prototype.

$600 USD in 25 days
(0 Reviews)
0.0
delamoure

It's a simple project. I will done this very accurate, but time to deliver is also depended from postal traffic (to Ukraine). My price also includes production of the device, and postal costs. Project will be done More

$2800 USD in 60 days
(0 Reviews)
0.0
artisticmind

Please refer to your PM.. Regards.

$600 USD in 15 days
(0 Reviews)
0.0
asfancher

Hi, please see PM.

$250 USD in 5 days
(0 Reviews)
0.0
projectspowers

We are embedded professional having 2 year of experience in this [url removed, login to view] check your PMB.

$250 USD in 30 days
(0 Reviews)
0.0
antonalexraja

Please see the PM

$250 USD in 10 days
(0 Reviews)
0.0
STDC

Dear Sir, View PM for more details. Regrads, SANDS Team

$500 USD in 20 days
(0 Reviews)
0.0
rajkumar8207

Hi, This project can be done even without a micro controller. But if you are willing to have a micro controller then it can also be done.

$400 USD in 20 days
(0 Reviews)
0.0
amitsaturn

plz select me. u ll like my work. plz see pm

$250 USD in 5 days
(1 Review)
0.0
andegwa

Hi, I will use my ICT and electronics background to build the circuit for you. I have done almost similar projects. Thanks Amos

$450 USD in 10 days
(0 Reviews)
0.0
ammarabbasi

Hello There ! I am interested in your project , doing it as by your satisfaction . Regards .

$250 USD in 20 days
(0 Reviews)
0.0
dimitech

Please check the PMB Thank you!

$750 USD in 30 days
(0 Reviews)
0.0
sudu86

I have to build the circuit now and start to test. I dont have a readily available one

$550 USD in 30 days
(0 Reviews)
0.0