So the method used is called PWM pulse width modulation , whereby the voltage sent to the fan is a train of DC pulses. See the excellent and not hard to understand tech explanation of fan control circuits at: PWM Fan Control. The trouble with PWM fan circuits is they operate at around 25kHz, and the pulses are high current we measured them from a Mac mini fan at over mA —not ideal in a computer being optimized for audio. Our unique circuit uses a power opamp, and while we utilize both the tachometer line from the fan and the signal from the motherboard, we completely eliminate the pulses— providing the fan with just smooth and variable DC.
To boot and operate a Mac mini that has been converted with an MMK requires a 12V power supply capable of delivering at least 4.
That circuit eliminates the voltage drop of the DC supply cable and ensures instantaneous voltage regulation right at the computer end regardless of spikes in current demand. The plug design ought to be such that you cannot even do it.
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Tetsujin Tetsujin True, I have another plug that happens to fit the back of the mini, and didn't know if it would cause damage. Sign up or log in Sign up using Google. Sign up using Facebook.
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Mac mini DC-Conversion / Linear Fan Controller Kit (MMK)
Sections 6. Flags 0. Introduction Use this guide to replace a faulty power supply.
- Fix a Mac Mini Loose Power Connector Cable!;
- Mac mini - Power & Cables - Mac Accessories - Apple!
- Genuine Original Apple A1188 Mac Mini 110w Power Supply;
- Mac mini Mid 2010 Power Supply Replacement!
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Tools Buy these tools. Parts Buy these parts. Step 1 Bottom Cover. Add a comment. Add Comment. Step 2. Step 3 Fan. Step 4.
Apple Mac mini W Power Adapter MALLA B&H Photo Video
Step 5. One comment. Step 6 Cowling. Step 7. Step 8 Antenna Plate. Step 9.
Step Step 12 Logic Board.