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How Many Volts Does Blink Doorbell Need?

Last Updated Jul 19, 2022
Rusty circuit breaker

You’ve taken a step further into smart living by buying the Blink Video Doorbell. However, you’re now wondering how many volts you will need to properly run all the doorbell’s features and keep your home secure.

The Blink Doorbell needs a voltage capacity of 16 VAC and 10VA to function. Anything below that amount will not provide the doorbell with sufficient power or allow it to ring the chime.

The correct voltage is vital to powering your doorbell, and you need the proper knowledge and tools to handle volt-related problems should they ever arise. Keep reading to learn everything you need to know!

How Many Volts Does a Blink Doorbell Need?

Doorbells run on an AC transformer between 5 – 24vAC. For the Blink Doorbell, you only need a capacity of 10 Volt Amps (VA) and 16 Volt Alternating Current (VAC). Anything below this will not power your doorbell or ring the chime.

Blink Doorbell’s maximum power rate is 40VA, which is the highest power capacity your doorbell can work with. Anything higher could damage not only your doorbell, but the circuit as a whole.

The number of volts needed for the Blink Doorbell to work properly is not very high. The minimum limit, 16vAC, is the basic volt power needed for gadgets like monitors and digital cameras. While it is true that smart doorbells require a bit more power than average doorbells, the extra features are worth it.

What Voltage Capacity Does Blink’s Chime Wiring Require?

Chime systems have a distinct volt capacity that smart doorbells like the Blink Doorbell use to stay active. Typically, they provide 16 to 24 VAC at 50 – 60 Hz to your doorbell, allowing the chime box to emit sounds.

When choosing between a mechanical and digital chime in your Blink App, you need to measure the voltage of your chime. If it provides less than 16 volts AC, you will not be able to complete the chime setup and your doorbell will not activate Event Response. This prevents you from getting live video feeds and makes it impossible to control the camera remotely through the app.

How to Test Your Doorbell Transformer Voltage

Before you install your Blink Doorbell, it may be helpful to test your doorbell wiring’s voltage to ensure it’s strong enough to power your smart doorbell. You must be sure of the amount of current passing through the doorbell post in your door frame or wall to avoid future volt-related problems. Luckily, testing your doorbell voltage is a very basic procedure.

To do this, grab some rubber gloves and a voltage multimeter. The KAIWEETS Digital Multimeter TRMS 6000 or the Etekcity Digital Multimeter are best for an accurate reading. Now, follow the steps below to test your doorbell transformer’s voltage:

  • If you’ve already installed your doorbell, carefully dismount it from the backplate while leaving the power active. Unscrew the backplate from the wall so it hangs dangling by the wire. Be careful not to touch it, as there’s live electric current streaming.
  • Program your multimeter to test for AC Voltage.
  • Attach the probes to your multimeter.
  • Put the probes on the two wires and measure your reading.

If your reading is up to or more than 16vAC, it is compatible with Blink Doorbell. If your voltage is less than 16vAC, you need to upgrade your transformer or get a new one.

Should You Upgrade or Replace Your Blink Doorbell Transformer?

If your transformer is not strong enough to power your Blink Doorbell, or if it has become damaged, replacement is generally advised over upgrading. Replacement guarantees a stable voltage capacity and prevents any mishaps that may surface from an upgrade.

How to Replace Your Doorbell Transformer

If you’ve decided to replace your doorbell transformer to accommodate your new Blink Doorbell better, you can follow the steps below to do so:

  • Switch the doorbell transformer power off through the circuit breaker. Use a multimeter to ensure there’s no power flow before moving on.
  • Disconnect the old transformer’s wiring.
  • Connect the new transformer’s wiring.
  • Switch the power back on through your circuit breaker.

Now, you can install your Blink Doorbell and enjoy the full range of features these smart devices offer. If you’re not experienced with doorbell wiring or feel uncomfortable in any way, it may be best to hire a professional to avoid damage or injury.


The Blink Doorbell requires 16 VAC and 10 VA for it to work. A lot of people tend to overlook this and proceed to mount their doorbells without verifying the electrical current. If your doorbell doesn’t work after installation, there is a solid chance that it is not a manufacturing defect, but the result of low volt capacity.

Your Blink Doorbell transformer can suffer from insufficient or excessive power, resulting in a blown transformer or a significant loss of power. For this reason, it is important that you know your Blink Doorbell’s voltage capacity, how to check it, and how to change your transformer if necessary.