If you're sick of hearing your doorbell ring, followed by your dog barking of course, you don't have very many options. You can buy a custom doorbell ringer which lets you choose from a handful of one-note beeping tunes, or you could take on this DIY project that does for the doorbell what polyphonic ringtones did for the cell phone. A link to step-by-step instructions for connecting an MP3 player to your doorbell—and even to a fingerprint reader if you'd like—after the jump.
This DIY from Popsci.com's How 2.0 Blog is pretty involved with wires and electronics, so make sure you know what you're doing before you get in too deep.
If you've got a spare MP3 player laying around your home, it's time to hack your household doorbell system and create your own customized "dingtone." Just like your cell phone's ringtone, you can change your dingtone to match the season, your mood, or with a little extra modification, the person at the door.
Parts You'll Need:
- (1) MP3 player (e.g., Sandisk Sansa Express 1Gb Amazon.com #B000MD40N8; $38.72)
- (1) MP3 player speaker (All Electronics #NGA-4; $4.35)
- (1) 9V wall adapter (All Electronics #DCTX-960; $3.75)
- (1) 78M05 Voltage Regulator (Digi-Key #LM78M05CTFS-ND; $0.55)
- (1) 0.47mF 50V electrolytic capacitor (Digi-Key #493-1885-ND; $0.23)
- (1) 0.1mF 50V electrolytic capacitor (Digi-Key #P925-ND; $0.18)