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Last Updated:
Sunday, May 19, 2013 04:43 AM |
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Featured Circuit of the Week |
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Chicken Coop Door Opener with
Timer
I received an email
from a guy in Australia who was trying to build a chicken coop system. He
was planning on using a conventional garage door mechanism to open and close the
6 doors to the coop. The commercial door opener opened and closed the
doors with a single pushbutton. He wanted to install a standard 220vac
powered timer so he could open the doors in the morning and close them at night.
He was not sure how to perform this function. I suggested the circuit
shown below..... |
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Hot
Links to Check Out! |
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Faraday Switches
are tiny one inch cube
electronic modules using a capacitance change technique. They draw very low
current and are ideal for battery powered applications. |
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Hobby Corner has hobby circuits -- check
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Circuit Solutions
Dave Johnson shares solutions to tricky electronic design problems. |
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Dave's
Circuits Special section with circuits
designed by David A. Johnson, P.E. |
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Call Dave for your next consulting project
David A. Johnson, P.E. is an electronics engineer with over
30 years practical experience
in the areas of analog & digital design, fiber optics and RFID. Electronics is
his vocation, hobby and passion. He is a published author with articles and
designs in EDN,
Electric Design, Midnight Engineering and Popular Electronics. Throughout
his career, Dave's imaginative approach to design has resulted in applying new
technologies
in creative and cost saving ways. |
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