How 2 create E-Textiles PCB flashing LEDs 555/ 555 to 4017 range of circuits plus examples

This How 2 guide forms part of a complete project.

Aimed at fulfilling aspects of the Eduqas Design Technology course, the project introduces the concept of E-Textiles.

Students research E-Textiles and use analysis and evaluation skills.

This guide is based upon Circuit Wizard by New Wave Concepts, however the guide would be helpful for a number of different circuit design programs.

The PCB uses larger pads that are designed for stitching conductive thread instead of attaching normal off board components on flying leads.

The first circuit uses a 555 astable circuit and a 4017 decade counter with 7 LED outputs used to produce a flashing array of lights.

The second circuit is a simplified version with only 3 flashing outputs. Up to 6 LED's can be used with this circuit as more LED's can be added in parallel. There is a video showing the simulation of the working PCB. Students are always encouraged to test their PCB's before etching to avoid any wasted materials when mistakes have been made.

Also included is a guide to creating a 555 astable PCB with one flashing LED (although a second can be added in parallel.

Zipped file includes examples of PCBs that can be opened and used with circuit wizard so textiles students can use these PCBs without having to create them on circuit wizard first.