The power supply requirements differ by Raspberry Pi model. All models require a 5.1V supply, but the current supplied generally increases according to model.
Exactly how much current (mA) the Raspberry Pi requires is dependent on what you connect to it. The following table gives various current requirements.
Product Recommended PSU current capacity Maximum total USB peripheral current draw Typical bare-board active current consumption Raspberry Pi 4 Model B 3.0A 1.2A 600mA
USB充電器 (スコア:5, 参考になる)
写真を見ると、ラズパイ3台につきUSB充電器を1台用意しているようです
https://telework.cyber.ipa.go.jp/news/20200514/pic2.jpg [ipa.go.jp]
ラズパイの消費電力は12Wぐらいですから、3台で36W
市販の40WクラスのUSB充電器で十分対応できます
とりあえず anker で40Wを調べたらこれが見つかりました
https://www.amazon.co.jp/dp/B00Z8Z7WEE [amazon.co.jp]
これクラスの製品で十分運用できると思います
Re: (スコア:0)
それ、1ポートあたり5V2.4Aまでしか保証されていない。
ラズパイ4が要求する5V3Aがいけるのか不明。おそらく1台だけならいけそうだけど、3台同時がいけるかはやった人じゃないとなんともわからない
Re:USB充電器 (スコア:4, 参考になる)
The power supply requirements differ by Raspberry Pi model. All models require a 5.1V supply, but the current supplied generally increases according to model.
Exactly how much current (mA) the Raspberry Pi requires is dependent on what you connect to it. The following table gives various current requirements.
https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/R... [raspberrypi.org]
4.1 Power Requirements
The Pi4B requires a good quality USB-C power supply capable of delivering 5V at 3A. If attached downstream USB devices consume less than 500mA, a 5V, 2.5A supply may be used.
https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711... [raspberrypi.org]