Be a while, but this would be a really cool Quelab card to give out.

Subject: [New post] 555 business card
From: "Hack a Day" <donotreply@wordpress.com>
Date: Fri, 8 June, 2012 9:01 am

Post : 555 business card
URL : http://hackaday.com/2012/06/08/555-business-card/
Posted : June 8, 2012 at 8:01 am
Author : Brian Benchoff
Tags : 555, business card
Categories : news

http://hackadaycom.files.wordpress.com/2012/06/5551.png

After checking out a few beautiful business cards while working at his engineering co-op, [Cody] realized he would soon need his own. Instead of a card with subtle off-white coloring, a tasteful thickness to it, and even a watermark, [Cody] decided to make a 555 timer business card (http://codyshaw.ca/2012/06/08/555-timer-business-cards/) .

[Cody] started his business card project by going through a few design iterations while figuring out what he wanted his business card to do. There were a few designs not chosen - one with a microcontroller, a few with just LEDs, and some with no circuitry at all. After checking out a few project from the EEV blog 555 contest (http://www.555contest.com/) , [Cody] decided to go with a simple 555 timer circuit.

Being a business card, [Cody] kept the circuit very simple; it's just a 555, phototransistor, and a few SMD LEDs. When a 9 Volt battery is placed on the contact points of the card, the 555 lights up the LEDs. When a laser is shone on the phototransistor, the LEDs start blinking. A very neat and sufficiently interactive circuit that is perfect for keeping component costs down.

After the break you can check out [Cody]'s business card in action.

Read more of this post (http://hackaday.com/2012/06/08/555-business-card/#more-76518)

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