diodes

                                                              diodes
a p-n junction diode is an electronics device which allows the flow of current in one direction only, it is formed from a semiconductor materials like germanium or silicon,
there there many types of special semiconductor diodes,called special purpose diode,
1.zener diode <voltagr regulator>
2.backward diode
3.varactor diode
4.step recovery diode
5.point-contact diode                                                                      my blog
6.tunnel diode
7.gunn diode
8.impatt diode
9.pin diode
10.photo diode etc.
  market price--- rs- 60/100piece
application- to convert ac to dc, and many other applications will be discuss later.
PROJECT WHERE I WILL USE IT- 220 VOLT AC TO 5VOLT DC CONVERTER, LED DRIVER,VOLTAGE DOUBLER,BATTERY CHARGER ETC