links
http://www.educypedia.be/electronics/electronicaopening.htm
http://digilander.libero.it/i2viu/
http://www.elektor.it/elektor-it.510573.lynkx
http://www.electronickits.com/
http://www.radioelettronica.it/
http://www.emcelettronica.com/index.html
http://www.discovercircuits.com/index.htm
http://www.leradiodisophie.it/