Decades long lurker, first time poster.
Excuse my 'behind the times' post, but I kind of enjoy making older hardware work in modern times. Case in point I just built a new system using all new old stock gear, with exception to a modern PSU and GPU.
I am recycling my Antec 900 Two case, it works, its massively overbuilt, and has copious cooling with fan filters. The problem with this case is that all the stock LED fans use 2 pin power and a speed selector switch that basically adds resistance to allow fan top spin at full or low speed. Its inefficient and just tedious, especially since my Asus Maximus VI Formula has excellent fan management. The proprietary Big Boy 200mm fan has no substitution. This is why I don't just swap everything out....and why toss out fans that still work perfectly and match.
As is it has been covered in at least two very oid posts,
https://forums.tomshardware.com/threads/mod-antec-tricool-case-fans.181559/ these the fans' PCB boards and microcontrollers actually have the functionality to monitor speed. They all contain hall effect sensors.
My question is can I just wire directly from the legs of one of these chips and plug into tach sensor pin on mobo fan connector? Or do I need diodes, resistors and such? I ask this because when looking at the traces, there is a path to wire this thing as the factory would have, but along these traces are spots for all the aforementioned components.
https://www.dropbox.com/scl/fi/gwwo...MP-2.jpg?rlkey=vbff4tglwkq2wdrhdm3fm5mqj&dl=0
www.dropbox.com
In the 2010 post referenced above they don't say if anything but a wire was added, it seems they just soldered on a wire and connected it to the mobo to monitor rpms and control fan speed via voltage regulation.
Also the microcontroller in the 120mm fan is FTC S277, from what I can tell the second leg from the left is where to solder a wire ?
https://datasheetspdf.com/datasheet/FS277.html
But on the 200mm Big Boy fan, things are a bit more complicated, there are several components. As far as i can tell the "brain" is an LB11967 chip from which I can tell from my very limited electrical abilities (none) has hall effect output. But I am not sure which leg is it, and again, would I be able to just solder a wire and plug it into the mobo? https://www.mouser.com/ProductDetail/onsemi/LB11967V-TLM-H?qs=5C9Q4QJFsuMFJ%2Bz9wibieA==
www.dropbox.com
https://www.dropbox.com/scl/fi/56nr...MP-2.jpg?rlkey=q93csu57rmnclju96fqpoevn9&dl=0
Lastly both these fans' pcb boards have an unused lug where the power wires go in labeled 'S", which I assume was intended as a speed signal output had the OEM specified it, and both those trace to the respective microcontrollers. Before taking them apart I tried simply soldering to the S lug on the Big Boy and nothing happened, after I tool it apart I saw the there were open connections along the trace, specifically labeled R9 and R
Thank you!!
Excuse my 'behind the times' post, but I kind of enjoy making older hardware work in modern times. Case in point I just built a new system using all new old stock gear, with exception to a modern PSU and GPU.
I am recycling my Antec 900 Two case, it works, its massively overbuilt, and has copious cooling with fan filters. The problem with this case is that all the stock LED fans use 2 pin power and a speed selector switch that basically adds resistance to allow fan top spin at full or low speed. Its inefficient and just tedious, especially since my Asus Maximus VI Formula has excellent fan management. The proprietary Big Boy 200mm fan has no substitution. This is why I don't just swap everything out....and why toss out fans that still work perfectly and match.
As is it has been covered in at least two very oid posts,
https://forums.tomshardware.com/threads/mod-antec-tricool-case-fans.181559/ these the fans' PCB boards and microcontrollers actually have the functionality to monitor speed. They all contain hall effect sensors.
My question is can I just wire directly from the legs of one of these chips and plug into tach sensor pin on mobo fan connector? Or do I need diodes, resistors and such? I ask this because when looking at the traces, there is a path to wire this thing as the factory would have, but along these traces are spots for all the aforementioned components.
https://www.dropbox.com/scl/fi/gwwo...MP-2.jpg?rlkey=vbff4tglwkq2wdrhdm3fm5mqj&dl=0
Dropbox
In the 2010 post referenced above they don't say if anything but a wire was added, it seems they just soldered on a wire and connected it to the mobo to monitor rpms and control fan speed via voltage regulation.
Also the microcontroller in the 120mm fan is FTC S277, from what I can tell the second leg from the left is where to solder a wire ?
https://datasheetspdf.com/datasheet/FS277.html
But on the 200mm Big Boy fan, things are a bit more complicated, there are several components. As far as i can tell the "brain" is an LB11967 chip from which I can tell from my very limited electrical abilities (none) has hall effect output. But I am not sure which leg is it, and again, would I be able to just solder a wire and plug it into the mobo? https://www.mouser.com/ProductDetail/onsemi/LB11967V-TLM-H?qs=5C9Q4QJFsuMFJ%2Bz9wibieA==
Dropbox
Lastly both these fans' pcb boards have an unused lug where the power wires go in labeled 'S", which I assume was intended as a speed signal output had the OEM specified it, and both those trace to the respective microcontrollers. Before taking them apart I tried simply soldering to the S lug on the Big Boy and nothing happened, after I tool it apart I saw the there were open connections along the trace, specifically labeled R9 and R
Thank you!!