What AC/DC converter is suitable for Arduino Nano

I am very new to arduino Nano. I want to power my arduino from a converter from VIN on the arduino nano pin. My circuit involves arduino nano, nrf and pzem. I want to know which specification of AC/DC converter is suitable for it? As for arduino Vin>7V and have 1A current rating. Can anyone please guide me which specication of AC/DC converter is suitable for my purpose.

What is the power source voltage? Also the NRF draws more 3.3V current than most Nano's can supply... the usual conversion is from some source voltage, directly to 5V and connected to the Vcc (5V) of the Nano, bypassing the onboard regulator. With so many devices to power, you should do that.

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A 9V 1A adapter is suitable.

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