COB Doorbell Sound Effect Module - 10 Pack
Create electric doorbell sounds with these COB Doorbell Sound Effect Modules from PMD Way.
An ideal way of making a cheap doorbell for the home or office, or just adding the sounds to a toy or more serious device.
Board is powered by 3~4.5V DC, and drives an 8 Ohm speaker between 0.5 and 2W. You will need a button, speaker, and an NPN transistor such as an S8050 or equivalent as shown in the diagram below: