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CD4060 Timer Circuit 1 minute to 2 hours

2017-12-23 18:01  
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CD4060 IC Timer Circuit  1 min to 2 hours


CD4060 Timer Circuit 1 minute to 2 hours

This is a 1 minute to two-hour timer switch. The 14-stage binary ripple counter Type 4060, IC1, has an on-chip oscillator capable of stable operation over a relatively wide frequency range. In the present circuit, the oscillator frequency is determined by an external RC network connected to pins 9, 10 and 11.

CD4060 IC Timer Circuit  schematic 1 min to 2 hours

PARTS LIST
R12.2MΩ
R218KΩ
R31KΩ
R41KΩ
R51KΩ
R61MΩ
VR1500KΩ (504)
C1220nF (224)
C210nF (103)
D1LED
D2LED
D31N4001
Q1BC547
IC1CD4060
RL1Relay

When the power is on, the pulse at junction R6-C2 resets the counter and counting starts. When the counter reaches bit 14 (Q13), pin 3 goes high so that the relay, a 9V type, is turned on via driver Q1.

CD4060 CMOS 14 Stage Ripple Carry Binary Counter Divider Oscillator ic pin configuration

CD4060 IC PINOUT

The time delay is set with the aid of VR1. Time delays of between one minute and two hours are possible by appropriate dimensioning of the timing components:

1-30 minutes: C1 = 220nF ; VR1 = 500KΩ.
1-60 minutes: C1 = 470nF ; VR1 = 500KΩ.
1-120 minutes: C1 = 470nF ; VR1 = 1MΩ.

The timer is powered by a 9V PP3 battery. Light-emitting diode D1 does not affect the operation of the circuit and is included merely to show that the timer works. Diode D1 and resistor R4 are , therefore, optional components.

CD4060 IC Timer Circuit with relay switchCD4060 IC Timer Circuit 01 min to 02 hours


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