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Last Updated:
Tuesday, November 18, 2008 03:46 AM |
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Featured Circuit of the Week |
White LED Night Light
As many of you know, I have a pet peeve with poorly made LED night lights. Often, the light from the LED quickly fades, so within months, the light is useless. I have posted several versions of modified night lights using higher
quality components. This circuit is yet another version, which produces much more light than those other designs. The circuit brings together two high power white LEDs made by Cree with a compact AC to DC power supply from Bias Power..... |
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All Circuits of the Week |
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Featured Circuit Last Week |
Miniature Pushbutton On/Off Switch
In many battery powered devices, you would like to turn the circuit on and off by pressing a small pushbutton switch. One press turns the device on and second press turns it back off. The flip/flop circuit below uses a minimum number of parts to perform this
function. It operates from DC supply voltage which can range from 2v to 6v. It draws very little current and takes up little space. Yet, it can control up to one amp of current. The circuit uses a single flip/flop device made by Texas Instruments. ... |
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All Circuits of the Week |
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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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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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