Emergency Light & Alarm

 

Emergency Light & Alarm

Powered by two AA NI-CD batteries

Four switchable options

Parts:

R1____________220K1/4W Resistor 

R2____________470R 1/2W Resistor 

R3____________390R 1/4W Resistor 

R4______________1K5 1/4W Resistor 

R5______________1R 1/4W Resistor 

R6_____________10K 1/4W Resistor 

R7____________330K 1/4W Resistor 

R8____________470R 1/4W Resistor 

R9____________100R 1/4W Resistor 

C1____________330 nF 400V Polyester Capacitor

C2_____________10µF 63V Electrolytic Capacitor 

C3____________100 nF 63v Polyester Capacitor 

C4_____________10 nF 63V Polyester Capacitor 

D1 -D5________1 N 4007 1000V 1A Diodes

D6______________LED Green (any shape)

D7___________1 N 4148 75V 150mA Diode

Q1, Q3,Q4______BC 547 45V 100mA NPN Transistors

Q2,Q5_________B C 327 45V 800mA PNP Transistors

SW1, SW2________ SPST Switches

SW3____________ SPDT Switch

LP1____________2.2V or  2.5V 250 - 300m A Torch Lamp

SPKR___________8 Ohm Loudspeaker

B1_____________2.5V Battery (two AA NI-CD rechargeable cells wired in series)

PL1____________Male Mains plus

from : http://www.scribd.com/doc/38741900/Emergency-Light-Alarm