My Kraftwerk tie

I whipped this up in a couple hours for my Kraftwerk Halloween costume. No microcontroller! Just a 7555 timer and a 4017 decade counter running off two AAA batteries.

If you don't get it, see: http://www.youtube.com/watch?v=VXa9tXcMhXQ

The connections on the underside of the tie were wire-wrapped, and the AAA battery pack goes inside my shirt. I was thinking of using a 3V coin cell, but it would've probably lasted only a few minutes.

If I had thought of this earlier, I would've used a surface-mount ATtiny2313 with multiple patterns built in. Next time!

Category:

Science & Technology

Tags:

• kraftwerk
• led
• tie
• we
• are
• the
• robots

[djrolf]

Hello, may you help me build one like this? send me the instructions? djrolf@bol.com.br thanks

[PearlsphereBiophilia]

I need one of these. Just to shock my friends. mwaha ha ha ha

[wilsojac1]

bet thats fun to tie

[GiorgioCapocasa]

@PoprocksAndCoke I really want to make this one, so I've made some calculations and ordered the parts.

At any given moment, just one LED is on. So 20mA are used.

On a CR2032 coin cell battery (225mAh), this should lead to about 10-11h of battery life.

I'm going to be using a MSP430 uC (low power stuff!), so I think that the micro controller power consumption should be negligible, compared to the LEDs.

When everything arrives, I will keep you updated :)

[PoprocksAndCoke]

I'm thinking about putting together one of these. Looks great. How much battery life do you get out of the AAAs?

[SatelliteHeartTrans]

If its not too much trouble, would you mind sending me the schematics?

[MoshFrosch]

your tie is amazing :D

I made one myself the other day but I had to customice a pre-assembled LED-module...

thumbs up for your talent, mate ^^

greetings from Germany ;D

[Williraser]

cool tie :D