Home › Magazines › 2009 › July/August › Economy Timer

Economy Timer

Published in issue 391, July/August 2009

This circuit detects when a window is open (it can also be used with a door), indicates that the window is open by means of a red LED or a blinking LED, and emits a loud acoustic signal from an intermittent electronic buzzer to remind you to close the window.
The active components consist of a pair of type 555 timer ICs.

Click below to download a PDF copy of this article from Elektor magazine.

	Downloads
	Article PDF
	5 Elektor Credits
	Order this magazine
	Magazine July/August 2009
	UK391 (US $ 11.30)

Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

Subscribe now

Browse online

Subscribe to our free
E-weekly Newsletter!

Enter your Email address:

Front Panel Express

Design your unique front panel with our free CAD software - it is quick and easy! Front Panel Express will machine your design with modern CNC technology. You will receive the panel exactly as you need it in a couple of days.
Instant download

FAQ

Before submitting questions, review our FAQ section!

Spotlight

Elektor 1990 through 1999

This DVD-ROM contains the full range of 1990-1999 volumes (110 issues, more than 2,100 articles) of Elektor Electronics magazine.

Search

Subject Area

Articles

Products

My Elektor

Home › Magazines › 2009 › July/August › Economy Timer

Economy Timer

Subscribe now

Subscribe to our free
E-weekly Newsletter!

Front Panel Express

FAQ

Spotlight

Search

Subject Area

Articles

Products

My Elektor

Home › Magazines › 2009 › July/August › Economy Timer

Economy Timer

Subscribe now

Subscribe to our freeE-weekly Newsletter!

Front Panel Express

FAQ

Spotlight

Subscribe to our free
E-weekly Newsletter!