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Raspberry Pi The right power supply

Raspberry Pi power supply Choosing the power supply will determine if experimenting and working with the Raspberry Pi will be a nuisance or if you can have many successful experiences. In particular, anyone who has an application for which the Raspberry Pi should run continuously should carefully select the power supply.
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Raspberry Pi The right power supply
Raspberry Pi The right power supply

Choosing the power supply will determine if experimenting and working with the Raspberry Pi will be a nuisance or if you can have many successful experiences. In particular, anyone who has an application for which the Raspberry Pi should run continuously should carefully select the power supply. Because not every power supply is equally suitable for the Raspberry Pi. This is not due to the Raspberry Pi, but to the power supplies that are either poor in quality or unsuitable for powering the Raspberry Pi.
Raspberry Pi: Basics of Power Supply


Choosing the right power supply

In order to avoid the many problems with an unstable power supply, one should use a "real" power supply with a stabilized voltage and not the cheap Chinaböller of Amazon or eBay. With a high-quality power supply, the voltage remains stable even at peak loads.

Unfortunately, the border between charger and power supply blurs. What you often get to buy as a power adapter is just a charger. Battery-powered devices will not cope with this because the charging electronics take care of the right battery charger.
Unlike the Raspberry Pi. He expects a stabilized tension. Especially when the current fluctuates violently depending on the use and the connected devices.

Unfortunately, the price says nothing about the quality of a plug-in power supply. Precisely because the dealers themselves do not know what exactly they sell there. That said, it is quite possible that you can get a filtered and stabilized power supply for little money, while an expensive model is just a simple charger.

To be really sure, you would first have to do a test setup with power-hungry USB devices and measure what happens to voltage and power during operation. Unfortunately, this is not so easy and not every user has the appropriate measuring equipment for it. Simple multimeters are not enough for a qualified measurement.

Note: Defective quality power supplies can interfere with other power supplies or electronic devices.
Official power supply for the Raspberry Pi
The purchase of power supplies for the Raspberry Pi is therefore always a gamble. To avoid a bad buy, you should buy power supplies only where they are explicitly available as accessories for the Raspberry Pi. There is also an official power supply for the Raspberry Pi 3, which is also recommended for any other model.
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