Free circuit diagrams


Bookmark and Share
Related
Contact
email: jokam85@gmail.com
privacy policy

Remote Doorbell Warning Switch



Circuit diagram

Important Note:
This circuit should only be used with the solenoid type chime doorbells, the electronic type that play tunes will not work here.

Notes:
The hardest part for this circuit was the title. It is quite easy to miss the sound of a doorbell if you are watching TV , this circuit gets round the problem by providing a visual indication, i.e. a lamp. As an alternative, a LED could also be used. You could just parallel a lamp across the doorbell, but this would mean extra drain from
the doorbell batteries or transformer. Using a series resistor R1 actually reduces current flow , and if run from batteries, will give them a longer life. The value of R1 is chosen so that about 0.6 to 0.7 volts is dropped across it, and the doorbell should
still ring. I used a combination of a 22 ohm resistor in parallel with a 50 ohm. The doorbell still rang and circuit operated correctly. I used to have an electromechanical counter that registered each time when someone pressed the switch....in fact, I remember a time when I had more "hits" at my doorbell then at my web site=

author:,
website: http://www.electronics-lab.com



Link to this page for forums and blogs:
All content on this site is provided as is and without any guarantee on any kind, implied or otherwise. We cannot be held responsible for any errors, omissions, or damages arising out of use of information available on this web site. The content in this site may contain COPYRIGHTED information and should not be reproduced in any way without prior permission from the authors. Be aware! Electricity can kill!

www.free-circuit-diagrams.com © 2008.
page generated in :0.1470