Projects

DIY Electronics projects with circuit diagrams , designs and schematics. Step by step illustration of building a electronic projects from scratch in brief

Quiz Buzzer Circuit using IC 74LS373

Frank Donald November 4, 2013 2 Comments

Quiz buzzer circuits have been available numerous in number yet we face many problems in most of the circuits and some cost much. Here is a perfect and cost effective electronic circuit which can be used for quiz in schools…
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Projects

LED, transistors

Design of Wireless modems using IC 555 and PLL 565

Frank Donald August 31, 2013 13 Comments

In Wireless communication binary data or bits was transmitted by means of a wireless modem (Modulator and Demodulator) which uses FSK technique to transmit bits from the modulator and the demodulator.In FSK technique the carrier frequency is shifted between two…
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Projects

Timer IC 555