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Last Updated:
Wednesday, May 22, 2013 06:58 AM |
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Featured Circuit of the Week |
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Eight Solar Cell Lithium
Ion Battery Charger
A single lithium ion
battery cell needs 4.2v from a current source to insure it is fully charged.
A solar panel with just enough individual cells wired in series to produce the
needed voltage would be more efficient than one with more cells for a given
surface area. If you divide 4.2 by eight you come up with a figure of
0.525 volts.... |
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All Circuits of the Week |
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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
it out. |
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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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Dave's other websites to visit:
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collection of resources
for inventors, hobbyists,
scientists & engineers |
resource portal for information
regarding renewable, alternative
or sustainable energy |
Dave Johnson & Associates -
consulting services for new products from conception to
production or improving the
cost & performance of existing products |
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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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