How to Go Postal

Step 2 Circuit and Sticker Design

This instructable will detail one way to put a blinking LED circuit on postage, fabric, wood and other surfaces. But there's a lot of potential for what could be made using these materials and techniques and a world of simple circuits in textbooks and on the internet to try out. The conductive paint and ink will add resistance so you may need to experiment and tweak component values to get the effect you want. We've included some images and video of other examples including a traffic lite sticker and an homeage to Above created by Fred Zyda in the guerilla studios @ SIGGRAPH that uses timer and decadal counter ICs.

These are the parts we use to create a 555 timer-based flashing LED circuit:

1. 47k resistor (R1)
2. 100k resistor (R2)
3. 400 Ohm resistor (R3)
4. 10uf capacitor (C1)
6. 2 3 Volt DC CR2032 or better lithium batteries
7. 10mm 3 volt, 30mA LED (of any color)
8. 555NE timer IC Chip

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