Good afternoon All About Circuits,
Working with a motion detector (Quorum A-160 Passive Infrared Detector) that will turn on an LED display. The A-160 sends out a signal that lasts for two seconds but the display needs to stay on for a couple of minutes. So I built a 555 timer circuit to take the the second pulse from the A-160 and activate the display.
I built a circuit from Ramsey called UT5. The schematic is at
http://www.allenpitts.com/electronics/555/Ramsey_UT5.gif
I modified it
http://www.allenpitts.com/electronics/555/Modified_Ramsey_UT5.gif
The the LED with resistor marked R7 represents the LED display.
The nine volt battery with momentary switch would be replaced by the
pulse from the A-160.
Can't seem to get it work. Any ideas?
Thanks.
Allen In Dallas
Working with a motion detector (Quorum A-160 Passive Infrared Detector) that will turn on an LED display. The A-160 sends out a signal that lasts for two seconds but the display needs to stay on for a couple of minutes. So I built a 555 timer circuit to take the the second pulse from the A-160 and activate the display.
I built a circuit from Ramsey called UT5. The schematic is at
http://www.allenpitts.com/electronics/555/Ramsey_UT5.gif
I modified it
http://www.allenpitts.com/electronics/555/Modified_Ramsey_UT5.gif
The the LED with resistor marked R7 represents the LED display.
The nine volt battery with momentary switch would be replaced by the
pulse from the A-160.
Can't seem to get it work. Any ideas?
Thanks.
Allen In Dallas
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