Electronics Fan Controller Reference 3 :: Advanced Circuits :: update 1

Advanced Projects


The MutiFanBus with level LEDs
This is a moderatly complex circuit.
As the temperature increase more fans are activated by opamps through relays.
The circuit used 3 FANS (FAN1-3) and hase a 5k Variable resistor to adjust trip levels (level at which a new fan is switched on).
An row of 4 LEDs is used to indicate temperature/circuit-status.



The RheoBus with LED bargraph indicator
Works in the same way as a standard rheobus (see simple projects) but has a LM3914 bargraph indicator circuit

Adjust VR5+4+3 to tweak the display. Use SW3 to change the bargraph to dot (one led that moves up or down) or bar (a row of LEDs that moves up and down).

Use VR1 to adjust the fan speed and in turn, the bargrah level.



The 2 Button Motorised Up/Down BayBus with Bargraph
This is a fairly advanced project.
Pressing and holding one of the buttons either turns the fan speed up or down (depending on which button you press). The buttons drive a motor backward or forwards which in turn rotates the potentiometer that controls fan speed backwards or forwards and a 10LED bargraph circuit, adjust VR5+4+3 to tweak the display. Use SW3 to change the bargraph to dot (one led that moves up or down) or bar (a row of LEDs that moves up and down).

Add more resistance to the motor with VR2 if it spins to fast.



The 4017B IC HIGH/LOW/OFF UltraBus (Single PTM button operation) with LED indicators
This is a farily complex circuit.

The 4017B counter/decoder IC latches open the next chanel from 0-9 when a pulse is recived on the '>' input, a pulse to R resets the output to '1'. This circuit demonstrates a use for this.

I've connected the outputs firstly through an opto-isolator the to a transistor, then (in the case of the fan) to a relay. This means the circuit can find the current to open the relay.
I have used relays so that large wattage fans can be used safely and so that the circuit doesn't remain 'half on' when the computer is off.

3 LEDs are used to indicate the current fan output level, a seprate LED for each channel allthough a Tri-Colour LED could also be used to good effect also.
The PTM button switches the fan from 12V --then-> 5V --then-> OFF (loop).



The 4017B IC 12V/7V/OFF UltraBus (Single PTM button operation) with LED indicators
This is a fairly complex design. (see above)
A PTM button selects between 12v, OFF or 7v.
This circuit is similar to tthe one above.
7v is achived by using the 5v and 12 line (12v-5v=a potential DIFFERENCE of 7 volts)



The 4017B IC HIGH/LOW/AUTO/OFF (Single PTM button operation) UltraBus with LED indicators
This is complex circuit.
This works in just the same way as the above design but has one more state (ouput '3') before it resets itself.

This additional sate switches the the fan through 12V and a parallel potentiometer and thermistor (to help with wattage handling). Use a high watt 100ohm pot for this.

4 LEDs are used to indicate the current fan output level, a seprate LED for each channel.
The PTM button switches the fan from Auto --then--> 12V --then-> 5V --then-> OFF (loop).
Diagram Very Soon...


The HIGH/LOW/OFF BayBus with !Fan Shutdown Delay!
This is a very complex circuit.

This cirucit again uses a 4017B decoder (see above), it has three states: 12v, 5v and OFF. SW1 is de-bounced by a 40106B Hex Schmitt Inverter. A transistor delay working with a relay and the 5v standby line provides the 'after off' fan off delay.

The fan remains at a low setting for around 1 min after the PC has been turned off. VR1 tweaks the time. To alter the length of the delay by a large amount increase/decrease R5's value (If you can find large resistors, use smaller ones in series (3 1000K resistors are equal to 1 3000K, etc).

3 LED indicators show which state the circuit is in.

The MODE PTM (SW1) cycles through the states.



The AUTO/MANUAL/OFF BayBus with !Fan Shutdown Delay! and LED indicators
This is a very complex circuit.

This cirucit again uses a 4017B decoder (see above), it has three states: AUTO, MANUAL and OFF. SW1 is de-bounced by a 40106B Hex Schmitt Inverter. A transistor delay working with a relay and the 5v standby line provides the 'after off' fan off delay.

In AUTO: a thermistor (R6) and tweaking potentiometer (VR3) control the fan speed. An LED (D3) lights.

In MANUAL: a potentiometer controls the fan speed (50ohms for normal fans, 20ohms for CPU fan (to prevent stalling)). An LED (D2) lights.

In OFF: an LED (D1) lights.

When PC is OFF: The fan remains at a low setting for around 1 min after the PC has been turned off. VR1 tweaks the time. To alter the length of the delay by a large amount increase/decrease R5's value (If you can find large resistors, use smaller ones in series, 3 1000K resistors are equal to 1 3000K, etc).

The MODE PTM (SW1) cycles through the states.




The 4017B IC 10 state (OFF-FULL-HIGH--------LOW-AUTO) (Single PTM button operation) UltraBus with LED indicators (plain silly)
You've got to be some SERIOUS single PTM junkie to contemplate this.



The 4017B and 4026B Single Fan controller with shutdown delay and 7 segment fan state indicator (off - 12v - 5v - Manual) and overheat indicator.
This is a very advanced project.
It uses a 4017B IC to control 4 output states (OFF-MANUAL-12V-5V) with a single PTM.
It also uses a 4026B IC to control a 7 segment display giving the number of the present state!! The decimal point lights if temperatures reach the level set by VR3.
The fans remain on for about 1 min after the pc has been turned off if the 5v line is connected to the 5VSB line.
Use PTM SW1 to select the FAN state (and thus the displayed number)



The 4017B and 4026B Quad Fan controller 7 segment selected fan indicator and 3 PTM (select, +, -)operation.
This is a very advanced project.
It uses a 4017B IC to select one of four FANs with single PTM.
It also uses a 4026B IC to control a 7 segment display giving the number of the present selected FAN.
Selct the fan you wish to modify the speed of (hit FAN SELECT button until the number of the fan is displayed on the 7 segment display) and then use SPEED +/- to adjust the speed of the selected fan.
The motors control/turn the potentiometers which should be 2W at least and be 20Ohm (for CPU fan) and 50Ohm for a normal fan.



The 4017B and 4026B 3 Fan ON/OFF BayBus with 7 Segment Display
This is a very advanced project.
It uses a 4017B IC to select the state (ON/OFF) of FANs with single PTM.
It also uses a 4026B IC to control a 7 segment display giving the number of the presently selected FAN set-up.
Pressing the SELECT SET-UP PTM (SW1) cycles through all the possible ON/OFF combintations of the 3 FANs.
Truth Table:
S - F1-3
0 = 111
1 = 110
2 = 100
3 = 010
4 = 101
5 = 011
6 = 001
7 = 000


-------------------------------------
Other Circuit Guides:
Fan Controller Reference 1 :: Simple Circuits
Fan Controller Reference 2 :: Moderate Circuits
Fan Controller Reference 3 :: Advanced Circuits
Fan Controller Reference 0 :: OLD VERSION

 

Very impressive

Have you wired all these up? Any pictures?

Rob.

 

Thanks for the positive feedback, i've tested most of the circuits or at least the sub-modules that they comprise of and am confident that they all work.

I don't have any pictures; i sort of have a big club of PCBs and break board hanging out of my rig, it beautiful in a chaotic sort of way!

 

acrimonious could You plz send me the files in livewire...plz
carnage@tenbit.pl

 

Your BayBus Ragnar

 

Notice: I have added some new circuits

 

I have a little problem with this Baybus: 'The AUTO/MANUAL/OFF BayBus with !Fan Shutdown Delay! and LED indicators'

I don't know that these Q1+2+3+4+5+6 is, and the the thing on the left side of it? I also need to know wich components i need to make it.

Thx

 

Q1-Q6 are opto-isolators the symbol is an LED and a PHOTOTRANSISTOR next to each other, i'll run you off a parts list soon.

 

When are the list coming, I need it very much for my school project.

 

heh i am building my megabus... I have allmoust all needed parts (Poland) its hard to find all needed ones...

 

Is it a 4N27 I should use to Q1+2+3+4+5+6, or am i totally wrong.
I also need to know what RL1+2+3+4 are.

Please help.

 

yeah your right about the 4n27.

RL 1-4 are RELAYS!!!

 

Relays

I know its relays, but which ones? what values? And what about the potmeters? are these normal potmeters or a special kind? Im trying to make the OFF/AUTO/MANUAL circuits.

 

Hey Acrim,
I have some troubles in reading your FAN threads: images are not available...

Just to let you know...

GeeK!

P.S.: going to realize your PWM fan controller...

 

The AUTO/MANUAL/OFF BayBus with !Fan Shutdown Delay! and LED indicators

Hey.. I need some help with this circuit, Im missing a few informations.

1. You havent mentioned the values of the thermistor (R6), how many ohms? Do you got a compunent number on this as well? (having a problem finding it) What does the 30 degree C means writed on R6 compunent?

2. Second problem are the Potmeters VR1, VR2, VR3. What values are these? You havent mentioned the ohm values? Do you got any compunent number or datasheets on these as well?

3. Which kind of transistors are Q4, Q5, Q6? Can I use BC547?

4. Im trying to integrate the "state indicator" From "The 4017B and 4026B Single Fan controller with shutdown delay and 7 segment fan state indicator (off - 12v - 5v - Manual) and overheat indicator." circuit, so I need to know the value of thermistor R9 as well. (etc. compunent number or any info)

Nice forum posting, you just need to write down all the info about each compunent!!

From 2mas

 

*bump*

Any word on fixing the images? I want to see the circuits!

 

2mas:

1. See new diagram (below)
2. See new diagram (below)
3. You can use a BC547 only for Q4, for Q5 and Q6 i'd use at least a BC550B. (see new diagram below)
4. See diagram, it might just be exaclty what your looking for (below):


Tau:

sorry bout the images, i'll get em working in a few days hopefully, sorry bout that.

 

Hi, with reference to your 4017B and 4026B Quad Fan controller 7 segment selected fan indicator and 3 PTM (select, +, -)operation.

Do you have a parts list for this, maplin maybe.

if not, what are the RL, RD and MT's

 

Not to sound stupid (Though I probably will!), but what is livewire?

 

Livewire is a package that you can draw electric circuit schematics such as the ones used by acrimonious in this post