This is IC 4060 Timer circuit. When rises time that is set, Suppose set 5 minutes time. after all time to 5 minutes. the circuit will emit a sound buzzer once. This circuit use volume and switch to set time clock.
- Use 9V battery
- Use current around 23mA (is working) 2mA (at standby)
- Can determine the time between 22 seconds to 4 hours. Example: 1 hour timer circuit, 2 hour timer circuit
- PCB size : 2.43 x 1.53 inch.
How it works
First of all, IC1 (Ic 4060) is a frequency divider IC, at pin 9, pin 10, and pin 11 are pins for connecting to R, C as frequency generator which can be adjusted by VR1. The signal that divider frequencies of IC1 will send out to pin 1, 2, 3
In figure 1 is the completely Alarm Clock Timer circuit.
Next, there is a switch as a selector to determine alarm time. When timing rises the time setting, at TAP point will have voltage from IC1, send in both ways.
The first passed to D1-diode to the frequency generator sector. To makes, IC1 stop the frequencies.
And, another way will send through R3-resistors go to pin B of TR1- transistor will work together with R4, R5, C2, TR2 and dynamic buzzer as frequencies generators.
Thus the dynamic buzzer so emits alarm sound when to time setting.
Assemble 4 hour timer circuit
To begin with, a picture putting all components and connecting the external parts as shown in Figure 2.
Then, in assembling the circuit should begin from the smallest component before to so beautiful and easy, that start with a diode as followed by resistors and sort of height and so on.
And then, for parts has various terminal such as diode, electrolytic capacitors, and transistors etc, Be careful in assembly circuit. Before putting these devices to PCB must coincide.
For the convenience of those who want to build this project. We design the PCB layout for you.
First of all, check all for errors. Second, connects a 9-volt battery to this circuit, the positive terminal at +9V and then the negative terminal to the ground. Then, rotate the 500K POT full left to MIN.
First, slide S1-switch to number 1, then release about 22 seconds, will emit sound at the dynamic buzzer, and then Take away the 9Volt out.
Second, slide S1-switch to number 2, then connecting the 9V power supply, next release about 45 seconds, will emit sound at the dynamic buzzer, and then take away the 9 volts out.
Third, slide S1-switch to number 3, next connecting power supply to the circuit, then release about 90 seconds will emit sound at the dynamic buzzer.
Application of timer circuit
Frist, position 1. We can adjust the time at VR-500K between of 22 seconds up to 1 hour timer circuit.
Second, position 2. We can adjust the time at VR-500K between of 45 seconds up to 2 hour timer circuit.
Third, position 3. We can adjust the time at VR-500K between of 90 seconds up to 4 hour timer circuit.
The power supply, if do not use often can use the 9V battery. But if use very often. should use 9 volt adapter or this projects :
The detail components
The electrolytic capacitors
The ceramic capacitors
TR1-TR3______________C458, C828, C945, C1815
D1-D3_______________1N4148__75V 150mA Diodes
IC1_________________CD4060___14 stage ripple counter and oscillator IC
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