Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced into 500+ categories.
We have searched the web to help you find quick solutions & design ideas.

Got Designs?
Please eMail
if you want me to link to and/or post your original design
NOTE:  We make every effort to link to original material posted by the designer. 
Please contact us if our link is not to your site!  Thanks.

DiscoverCircuits.com -- Hobby Corner
Last Updated on: Tuesday, June 01, 2021 03:06 PM

Hobby Circuits List

The contents & graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB SITE server

More  Beeper & Buzzer Circuits    Doorbell Circuits

Hear Doorbell in Basement

If you canít hear your front doorbell when you are in your basement, this circuit might work for you.  Whenever the front doorbell button is pressed, the hobby circuit will activate a loud beeper positioned in the basement. This circuit takes advantage of the fact that in many homes, the 24vac power transformer used to power the doorbell is located near the furnace in the basement.  A box containing the electronic circuit could be mounted next to the transformer. 

A small bridge rectifier converts the 24vac into DC.  The 100uF capacitor filters the pulsating DC from the bridge to form about 30v DC.  Three diodes are wired in series with the door chime.  Whenever the front door pushbutton is pressed, the door chime sounds.  AC current drawn b the chime is routed through the three diodes shown.  The two diodes in series forms a 2 volt voltage source, which is connected to an inexpensive opto-isolator.  The 2 volts across the two diodes is sufficient to turn on the opto-isolator circuit, which routes DC to the gate of the ZVN4206 FET.  When the doorbell chime sounds, the FET turns on a piezoelectric beeper, drawing power from the 30 DC supply.  Make sure the beeper you use can handle the higher 30v voltage

Click on Circuit Below to view PDF of Schematic

Remote Doorbell

More  Beeper & Buzzer Circuits    Doorbell Circuits

Hobby Circuits List
eMail David A. Johnson, P.E. about this circuit

HOME Schematics Index Hobby Corner Dave's Circuits Contact Info
Imagineering Ezine Dave Johnson & Associates Faraday Touch Switches

 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  January, 1998 - June, 2021     David A. Johnson  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.