![power mac g5 case mods power mac g5 case mods](https://i.pinimg.com/originals/cb/0b/10/cb0b10b7c367317f9ec4f8f06046c645.png)
- #POWER MAC G5 CASE MODS MOD#
- #POWER MAC G5 CASE MODS PRO#
- #POWER MAC G5 CASE MODS PC#
- #POWER MAC G5 CASE MODS SERIES#
The more current you pull from them the more you’ll want a good sized heat sink. They’re good for 1 amp per the spec sheet but what’s often overlooked is that assumes some type of cooling as you can observe in the response curves. You may want to use a heat sink on this component and/or place it inline with whatever the fan is blowing on for active cooling. Since in this case we’re using a PWM controller to control the speed of the fan, I’d recommend something like an LM7812 voltage regulator since it would not require additional components (though I’d really recommend not using a linear but rather a switching regulator, preferably a nice one like from Pololu) Wire it like so:
![power mac g5 case mods power mac g5 case mods](https://p1.builds.gg/builds_pictures/26000/26781/144982/144982_1000.jpg)
I used the output voltage to control the speed of the fan. This also needed a 200 ohm resistor and a 2k potentiometer to control the output voltage from the regulator. On the blower fan I recycled from a Power Mac G5 (which didn’t need a PWM controller) I used an LM317T Adjustable-Voltage Regulator. I’m going on about 12V sources because my 3D printer is 24V, as are many of them. If you’re using a 24V source, and one 12V fan, you’ll need additional circuitry to bring the 24V source down to 12-10V. When wiring in series, the source voltage is split between the two loads.
#POWER MAC G5 CASE MODS SERIES#
If you’re using a 24V source, and are using 2 fans, you can wire the two fans in series and they will run at 12V each. If you’re using a 12V source, you’ll want to wire it like this: This pin is a feedback which tells the computer how fast the fan motor is actually spinning. So the fan receives power straight from the source, PWM from the PWM “Motor +”, and GND from the PWM “Motor -“.
![power mac g5 case mods power mac g5 case mods](https://i.pinimg.com/originals/1e/bc/9a/1ebc9a2c4eae8968b1c65f57687e2d67.jpg)
I’m seeing that some of the Mac fans can simply be fed the same input voltage to this pin and it works fine (the centrifugal fan from a Power Mac G5 worked fine like this), but most of the fans will not function if you simply put a DC voltage on the PWM pin. These are PWM fans, which means they need a continuous sequence of pulses timed accordingly to how fast they should be spinning. These dual 3 blade fans are at the intake of the Power Mac G5 CPU(s). This is the PCI Fan (blows on GPU, center of tower.)
![power mac g5 case mods power mac g5 case mods](https://technabob.com/blog/wp-content/uploads/2016/04/ef7xihkx6as.jpg)
This fan was out of a Mac Pro, 2009-2010. This fan was out of a Power Mac (G4?), and I’ve seen this connector and pinout on others. I’ll add more if I find more let me know if you need a specific fan figured out and I’ll add it. These connectors are from Power Macs and Mac Pros. VM/PWM, VCC/+, O/P, and GND/- are shown on both fans. If you remote the grey sticker on the back of the fan, you’ll see the same four wires on most of these fans no matter the connector. Ground is ground, VCC is +12V, O/P is Sense/Tacho, and VM or PWM is PWM.
#POWER MAC G5 CASE MODS PRO#
The Delta fans Mac used in the Mac Pro use the same pins essentially. Male Header: 47053-1000 Pinouts Motor Connections You can obtain those connectors and pins from Amazon and eBay pretty easy for a clean looking conversion.
#POWER MAC G5 CASE MODS PC#
The 4 wire Mac fans are about the same Delta brand fans as you’d see in a PC except the pin configuration is usually different. If the fan has more than 3 wires it is almost invariably going to be PWM type. The +12 is a constant and the pulse train frequency controls the speed. The 4 wire Mac fans that I’ve used have all been PWM. I’m not covering this in depth since I’m using these for a 3D printer project, but contact me if you’d like to have me break this down further. Chances are the connector you need to use looks like one of the Molex 2, 3, or 4 pin connectors. You’ll have to acquire the connectors and pins which work with your motherboard.
#POWER MAC G5 CASE MODS MOD#
If you’re reusing these with your hackintosh or case mod build, you’re going to want to repin these fans to work with your motherboard. I couldn’t find a clear pinout for a few common Mac fan connectors, and I noticed a lot of people wiring them up to straight DC sources wondering why they didn’t work. They are are wonderful static pressure Delta brand fans. I’m going to make an air scrubber to filter ABS fumes (mostly styrene) with a couple fans from my stack of retired Mac Pros. Mac Pro and PowerMac Delta Fan Pinouts and PWM Wiring