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DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Monday, March 26, 2012 01:32 PM
Hobby Circuits'
Category List
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LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB
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FLASHING LED ADVERTISING BADGE #1
designed by David Johnson, P.E. |
| I have seen numerous
flashing light badges at trade shows and conventions. They are often handed out as
gifts to promote some business. The devices often use inefficient circuits, which
cause the battery power source to be quickly depleted. My circuit is simple but
efficient enough to provide months of continuous LED flashing. It also has a tiny
push-button switch to turn on and off the light flashing, extending battery power.
Not all 74HCT74 devices will work in this circuit. I suggest using a quality
device from Texas Instruments. |
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Click on Drawing Below to view PDF version of Schematic |
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