Doorknob touch sensor

1. Doorknob... 2. Measuring... 3. The science... 4. LEDs really... 5. Sound card ...

Date: 04/24/2006 Views: 2050

This circuit buzzes whenever the doorknob it is attached to is touched. It works surprisingly well.

Date: 04/24/2006 Owner: Matthew Size: 10 items

	Circuit close-up Date: 04/24/2006 Owner: Matthew Views: 5035
	The oscillator Date: 04/24/2006 Owner: Matthew Views: 2102
	charge Date: 04/24/2006 Owner: Matthew Views: 1966
	Uncalibrated triggers Date: 04/24/2006 Owner: Matthew Views: 1913
	The calibrated response Date: 04/24/2006 Owner: Matthew Views: 2050
	Door knob touched Date: 04/24/2006 Owner: Matthew Views: 2165
	Wired up Date: 04/24/2006 Owner: Matthew Views: 2384
	Alarm Tripped 1 Date: 04/24/2006 Owner: Matthew Views: 2643
	Alarm Tripped 2 Date: 04/24/2006 Owner: Matthew Views: 2449
	Alarm tripped 3 Date: 04/24/2006 Owner: Matthew Views: 2833