Electronics For You Projects And Ideas 2000

EFY 2000 & PROJECTS 00 VOLUME More than 90 fully tested and ready-to-use electronics circuits IDEAS 2000 Electronics For You issues C o n t e n t s JANUARY 2000 2000 CONSTRUCTION PROJECTS 1) MICROPROCESSOR-CONTROLLED TRANSISTOR LEAD IDENTIFIER --------------------------------------------- 1 2) CONVERSION OF AUDIO CD PLAYER TO VIDEO CD PLAYER — I ----------------------------------------------- 9 CIRCUIT IDEAS 1) MULTIPURPOSE CIRCUIT FOR TELEPHONES ------------------------------------------------------------------------- 13 2) SIMPLE CODE LOCK -------------------------------------------------------------------------------------------------------- 13 3) AUTOMATIC BATHROOM LIGHT ---------------------------------------------------------------------------------------- 14 4) SMART FLUID LEVEL INDICATOR --------------------------------------------------------------------------------------- 15 5) AUTOMATIC SCHOOL BELL SYSTEM ---------------------------------------------------------------------------------- 16 6) DESIGNING AN RF PROBE ------------------------------------------------------------------------------------------------ 18 FEBRUARY 2000 CONSTRUCTION PROJECTS 1) PC BASED SPEED MONITORING SYSTEM ---------------------------------------------------------------------------- 19 2) STEREO CASSETTE PLAYER ----------------------------------------------------------------------------------------------- 24 CIRCUIT IDEAS 1) BASS AND TREBLE FOR STEREO SYSTEM ---------------------------------------------------------------------------- 29 2) PROTECTION FOR YOUR ELECTRICAL APPLIANCES ---------------------------------------------------------------- 29 3) DIGITAL WATER LEVEL METER ------------------------------------------------------------------------------------------ 30 4) UNIVERSAL HIGH-RESISTANCE VOLTMETE