With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
Room Visitor Counter with Relay Control
I use MSP430G2231 microcontroller generates two direction switch signal output, how to achieve
When someone via IR-P1.3, then by IR-P1.6, P2.6-LED1 lit, it indicates to enter,
When someone via IR-P1.6, then by IR-P1.3, P2.7-LED2 is lit, the exit
Download our new apps for iOS, Android and Windows 8!
© 2014 Autodesk, Inc.
PDF DownloadsAs a Pro member, you will gain access to download any Instructable in the PDF format.
You also have the ability to customize your PDF download.