5 To 30 Minute Timer Circuit
Tuesday, May 14, 2013 | Labels: 30, 5, circuit, minute, timer, to | |
This is so useful circuit because by using this circuit you can operate some thing with the delay of 5 min to 30 min.dont use NE555 here because the value of transistors it will not work here.
Parts
IC1: 7555
B1: 9V
C1: 33uF CAP
Q1: BC109C NPN
D1: 1N4004 DIODE
C2: 100n CAP
Relay 9 volt coil with c/o contact
S1: On/Off
S2: Start
S3: Range
R6,R5,R4,R3,R2,R1: 8.2M RESISTOR
R8: 100k RESISTOR
R7: 4.7k RESISTOR
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