![]() To begin with, a picture putting all components and connecting the external parts as shown in Figure 2. Thus the dynamic buzzer so emits an alarm sound when to time setting. To make, IC1 stops the frequencies.Īnd, 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. The first passed to D1-diode to the frequency generator sector. When timing rises the time setting, at the TAP point will have voltage from IC1, send in both ways. Next, there is a switch as a selector to determine alarm time. In figure 1 is the completely Alarm Clock Timer circuit. The signal that divider frequencies of IC1 will send out to pins 1, 2, 3 Example: 1-hour timer circuit, 2-hour timer circuitįirst 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 generators which can be adjusted by VR1.
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