30-04-2012, 07:37 PM
IN THE CIRCUIT ATTACHED,THE POTENTIAL DROP BETWEEN PIN 2 & 1 OF TSOP 1738 IS FOUND 0.68VOLTS.
ACCORDING TO DATA SHEET IT SHOULD BE 5 VOLTS.
THE CIRCUIT IS NOT WORKING.
ALSO IC1 NE555 PIN 2 GIVES 1.92VOLTS CHECKING BY MULTIMETER & PIN 3 GIVES 8.6VOLTS.
ALTHOUGH PIN 3 SHOULD GIVE OUTPUT ONLY AFTER TRIGGERING ACTIVE LOW AT PIN 2.
THE CIRCUIT IS WORKING ROUGHLY BY CONNECTING 9 VOLTS AT CICUIT USING A MULTIMETER IN AMMTER MODE.
WHT TO DO TO MAKE CIUCUIT RUN...
PLEASE REPLY FASTLY...