Tired of torn-up flower beds, Hap took matters into his own hands by combining a sprinkler and wireless driveway alert system. To allow enough time for the sprinkler valve to open, build pressure, and activate the sprinkler head, he constructed a time-delay unit from an old standby 555 timer. It activates the sprinkler valve with ac power from the control for 10 to 12 seconds — allowing plenty of time to open and apply a good H2O dousing to varmints and wayward mailmen alike. Scroll down to view a video demonstration and the parts list.
Timer Delay Circuit for Motion Detection System
Amt
Part Description
Allied Part #
1
555 Timer IC
263-0133
2
1N4004 Diodes
266-0004
1
Green LED
670-1199
1
Yellow LED
670-1066
1
SPST Mini Switch
642-1136
1
5V dc DPST Relay
886-2529
1
25K potentiometer
754-1257
1
470 ufd Capacitor
852-6566
1
5 ufd Capacitor
507-1056
1
10 ohm Resistor
296-6400
2
100 ohm Resistor
296-5644
2
1 Kohm Resistor
296-5562
1
15 Kohm Resistor
296-5720
1
Terminal Strip
607-7058
Additional parts required: Reporter Wireless Alert System with (1) Transmitter and (1) Receiver; Optima Sprinkler Control Panel
By refining topologies and using new fluid technology, Moog's new peak sine drive controller increases available power without increasing controller volume.
Two new introductions in the world of motion drives for automation are moving toward use of standard Ethernet communications, eliminating the use of custom hardware.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 3
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is
To save this item to your list of favorite Design News content so you can find it later in your Profile page, click the "Save It" button next to the item.
If you found this interesting or useful, please use the links to the services below to share it with other readers. You will need a free account with each service to share an item via that service.
Tweet This
3 
