- TEST POWER SUPPLY FOR MAC LAPTOP HOW TO
- TEST POWER SUPPLY FOR MAC LAPTOP PRO
- TEST POWER SUPPLY FOR MAC LAPTOP PC
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TEST POWER SUPPLY FOR MAC LAPTOP PC
OuterVision Power Supply Calculator is the most accurate PC power consumption calculator available and is trusted by computer enthusiasts, PC hardware and power supply manufacturers across the Globe. Revision : c03112 It's a newer RPi4 with the corrective fix you may use any cable - either an e-marked cable, or a NON e-marked cable.OuterVision ® Power Supply Calculator Real Power Consumption Revision : b03111 It's an ORIGINAL RPi4 with USB-C design flaw, and a NON e-marked cable is required for use with a USB-C charger.
TEST POWER SUPPLY FOR MAC LAPTOP HOW TO
Here's how to tell which version of the RPi4 you have ( REF): $ cat /proc/cpuinfo | grep Revision This combination also successfully powered the RPi 4B, and has continued to do so for more than 24 hours as of this writing. I also tried this same cable with Apple's 18 watt iPhone charger. This combination successfully powered the RPi 4B.
TEST POWER SUPPLY FOR MAC LAPTOP PRO
I tried this cable with my Macbook Pro 87W USB-C Power Adapter. I obtained an el-cheapo USB-C charging cable (aka NON e-marked cable) from Amazon. Also note that after trying my Macbook cable & charger on the RPi 4, I had to unplug and re-plug my power supply before it would charge my Macbook again! Just for grins, I also tried a new-ish USB-C charger made by Apple for an iPhone (18 watts as I read the low-contrast specs printed on the charger) with the same result: the 18 watt charger with Apple charging cable DOES NOT power up the RPi 4. I confirmed that it DOES NOT power up the RPi 4. In the meantime, I did try my Macbook Pro USB-C charging cable and 87W power supply. I've not tried a different cable yet, but when I do, I'll follow up here with the results. Tom's also expressed understanding and compassion for the Raspberry Pi organization. is a "no-go" at this point.įor Option 2, Tom's Hardware has conveniently provided a list of USB-C cables they've tested that they claim will work with the RPi 4. It's a standard - right? And so I didn't buy the "official" power supply when I bought my RPi 4. I saw no reason to cause the manufacture of yet another "wall wart" that may eventually wind up in a landfill when I've already got enough USB-C cables and chargers. The reasons for this bodge are less important now than the remedies, so let's get on with that.īuy the "Official" power supply sold by the Raspberry Organization, or A design that is compliant with the USB-C specifications will work with e-marked USB-C cables ( more info) unfortunately, the Raspberry Pi 4 will not. Or perhaps, The Foundation simply wanted to sell more of their "official" power supplies for the RPi 4B?Īnd so despite the fact that the Macbook Pro 87W USB-C Power Adapter ( now replaced by the 96W supply) has more than ample power to handle the RPi 4, the RPi 4 is missing hardware that allows it to work with e-marked USB-C cables. This has been reported in several sources, including this post on TechRepublic, this post on Hackaday, and further analyzed in this post by Tyler Ward. HOWEVER., it seems that the Raspberry Pi designers didn't read the USB-C specs, and didn't test their design very well before releasing it to production. The specifications printed on the adapter state that its 5.2 volt output is rated at 2.4 Amps. The Macbook Pro 87W USB-C Power Adapter has enough power to run the RPi 4B. It will not damage your RPi, but it won't work unless you use a NON e-marked USB-C cable ( details follow). EDIT NOTE: This is a revised answer as my original answer was wrong! Revised Answer:
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