MAKE: Blog: HOW TO - Make a 40-LED bicycle light

HOW TO - Make a 40-LED bicycle light

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Design news has their latest "Gadget Freak" up, make a 40-LED bicycle light - "To see and be seen after dark on his bicycle, Bill designed this 40-LED light. He configured a 555 timer IC to generate a continuous on/off timing cycle to alternately flash two groups of 20 LEDs. The device operates on four AA batteries, keeping things bright for even the longest night rides. You can extend battery life with a second circuit Bill designed that uses a short duty cycle to flash a single group of 30 LEDs ." [via] - Link.

Related:

LED projects @ MAKE - Link.
Bicycle projects @ MAKE - Link.

From the MAKE store:
Minipov-2

The MiniPOV2 is a persistence-of-vision device that rapidly blinks 8 LEDs on and off so that when waved through the air, an image or message appears to float in front of the viewer.
MiniPOV in action. The MiniPOV2 as an easy-to-build demonstration showing how microcontrollers work. Easy to make, inexpensive, and simple. This little kit teaches several not so little lessons:

How to solder
How to assemble simple kits
How to program microcontrollers

The kit includes a Microcontroller, sockets, resistors, LEDs, connectors, a battery case and a printed circuit board. Add some basic tools, a PC with a parallel port, and a little programming, and the MiniPOV is ready to blink out your deepest thoughts.

Get one now at the MAKE store - Link.

Posted by Phillip Torrone | Nov 21, 2006 06:38 AM
DIY Projects, Electronics | Permalink | Comments (3)

Comments

Oldest comments listed first.

Is it just me, or does the schematic for the 40-LED bicycle light only show 20 LEDs? Also, does it look like the guy on the bike has bright red flatulence?

Posted by: Shadyman on November 21, 2006 at 11:09 AM

Isn't miniPov up to version 3 that uses a much smaller programming connector?

Posted by: Oracle1729 on November 21, 2006 at 12:45 PM

we have the minipov3s in stock

Posted by: philliptorrone on November 21, 2006 at 1:12 PM

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