In addition to the tutorial to create a sensor bar: http://wiipiicii.blogspot.com/2006/12/construire-une-sensor-bar.html
You can order your electronic components on this site:
plate test: http://www.selectronic.fr/article . asp? article_ref_entier = 70.2330-2
or
http://www.selectronic.fr/article.asp?article_ref_entier=70.2330-1 =>
Connector for food:
http://www.selectronic.fr/article.asp?article_ref_entier=70.0759-9999
=> € 0.30
Son ( 1m): http://www.selectronic.fr/article.asp?article_ref_entier=70.4491-2 => € 0.60
2 LED Infrared: http://www.selectronic.fr/article . asp? article_ref_entier 70.6785-9999
= => € 1.20
2 LED color visible
http://www.selectronic.fr/article.asp?article_ref_entier=70.7821-9999
=>
Total: 4.2 € or 5.6 € (+ 6 € postage)
Lot 2: Supply of 4 x 1.5V AAA (6V)
Power: http://www.selectronic.fr/article.asp?article_ref_entier=70.0761 -9999 => € 0.90
plate test: http://www.selectronic.fr/article.asp?article_ref_entier=70.2330-2 or http://www.selectronic. com / article.asp? article_ref_entier = 70.2330-1 => or 2.90 € 1.50 €
Connector for food: http://www.selectronic.fr/article.asp?article_ref_entier=70.0759-9999 =>
€ 0.30 Son (1m): http://www.selectronic.fr/article.asp?article_ref_entier=70.4491-2 => € 0.60
2 LED Infrared: http://www.selectronic. com / article.asp? article_ref_entier 70.6785-9999 = => € 1.20
2 LED color visible http://www.selectronic.fr/article.asp?article_ref_entier=70.7821-9999 => € 0.30
Total: 4.8 € or 6.2 € (+ 6 € postage)
not need a soldering iron.
third solution proposed by Saiyan78
Powered USB http://soj.mesdiscussions.net/overclex/Electronique/Montage/creer-leds-sensorbar-sujet_4882_1.htm # t75494
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