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Wednesday, November 11, 2009

0 to 20 seconds timer



Most of people asked about a short time timer.So I decided to introduce you this one.Here The time is adjustable from 0 to about 20 seconds.you can chang the time of it by changing the C1 Capacitor.So try this..







Parts:

R1 1 Meg Pot

R2 10 K 1/4 Watt Resistor

D1,D2 1N914 Diodes

C1 10uf 16V Electrolytic Capacitor

C2 0.01uf Ceramic Disc Capacitor

U1 555 Timer IC

RELAY 9V Relay

S1 Normally Open Push Button Switch

Note

# Use R1 to chang the time of Timer
# By changing the C1 capacitor You can change the time of timer

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