Alarm.com ADC-VDBA-MCD
Doorbell Mechanical Chime Dongle
Description
The Alarm.com ADC-VDBA-MCD is a mechanical chime adapter designed for use with compatible Alarm.com video doorbells, including the Alarm.com ADC-VDB775. This adapter is required when installing an Alarm.com video doorbell with a traditional mechanical doorbell chime.
Mechanical chimes operate using a physical striker that moves when voltage is applied. Without the proper adapter, a video doorbell may not ring the chime correctly, may cause continuous buzzing, or may fail to operate reliably. The ADC-VDBA-MCD resolves these issues by regulating how power is delivered through the mechanical chime circuit while still allowing the doorbell to function normally.
The adapter installs inside or near the mechanical chime housing and works with an existing low-voltage doorbell transformer. Once installed, it allows the ADC-VDB775 to draw consistent power while still triggering the mechanical chime when the doorbell button is pressed. This helps prevent common installation problems and protects both the chime and the doorbell from improper operation.
The ADC-VDBA-MCD is intended only for use with mechanical chimes. It should not be used with digital chime systems. If a home uses a digital chime, a different accessory is required. Alarm Grid provides a detailed overview of mechanical versus digital chimes and proper installation methods in this guide: How Do I Install the Alarm.com Video Doorbell With a Mechanical Chime?.
This adapter is a small but essential accessory for many Alarm.com video doorbell installations. When paired with the correct chime type, it helps ensure reliable doorbell operation, proper chime activation, and long-term system stability through the Alarm.com platform.
Specifications
- Manufacturer: Alarm.com
- Model: ADC-VDBA-MCD
- Accessory Type: Mechanical chime adapter
- Compatible Doorbell: Alarm.com ADC-VDB775
- Chime Type: Mechanical chimes only
- Installation Location: Inside mechanical chime housing
- Function: Regulates power and enables proper mechanical chime operation
- Power Source: Existing low-voltage doorbell transformer
Brand: Alarm.com