LEDs, 555s, Flashers, and Light Chasers
One of the most common requests at All About Circuits is various methods of flashing LEDs. I'll try to show most of the techniques used for this purpose that have been covered on this site, explaining how and why along the way.
Index......................................................Skill Level
1....LEDs.....................................................................Beginner
2....Current Limiting.......................................o...Beginner/Intermediate
3....The LED / Resistor Only Bargraph....... ..Beginner/Intermediate
4....The 555 Integrated Circuit.........................Beginner/ Intermediate
5....The 555 and PWM.........................................Intermediate
6....Low Power Applications.............................Intermediate
7....The Joule Thief................................................Intermediate
8....From Four, Twenty.........................................Intermediate
9....Light Chasers.............................................o....Intermediate
10..Transistor Drivers..........................................Beginner/ Intermediate
.......BJTs
.......MOSFETs
11..Making Patterns........................................,/..Intermediate
12..Special LED Effects...................................,...Beginner/Intermediate
.......Throbbing LEDs
.......Fading LEDs (AKA Comet Trails)
.......Flickering LEDs (Fire!)
.......RGB LEDs (Millions of Colors)
....Conclusion
....Appendix
<Continued in next post>
One of the most common requests at All About Circuits is various methods of flashing LEDs. I'll try to show most of the techniques used for this purpose that have been covered on this site, explaining how and why along the way.
Index......................................................Skill Level
1....LEDs.....................................................................Beginner
2....Current Limiting.......................................o...Beginner/Intermediate
3....The LED / Resistor Only Bargraph....... ..Beginner/Intermediate
4....The 555 Integrated Circuit.........................Beginner/ Intermediate
5....The 555 and PWM.........................................Intermediate
6....Low Power Applications.............................Intermediate
7....The Joule Thief................................................Intermediate
8....From Four, Twenty.........................................Intermediate
9....Light Chasers.............................................o....Intermediate
10..Transistor Drivers..........................................Beginner/ Intermediate
.......BJTs
.......MOSFETs
11..Making Patterns........................................,/..Intermediate
12..Special LED Effects...................................,...Beginner/Intermediate
.......Throbbing LEDs
.......Fading LEDs (AKA Comet Trails)
.......Flickering LEDs (Fire!)
.......RGB LEDs (Millions of Colors)
....Conclusion
....Appendix
<Continued in next post>
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