Simple Alarm Clock Circuit Diagram. In the circuit the reed switch is connected across the reset pin 4 of the 555 and the ground. S1 and s2 are the two switches that are used in the circuit so that both can be put in two different places i e.
S1 and s2 are the two switches that are used in the circuit so that both can be put in two different places i e. The circuit consists of a 555 tone generator circuit which is an astable multivibrator. This simple alarm timer circuit is made with 4060 which has an integrated oscillator with a good stability with a relatively wide frequency range.
In the circuit diagram the oscillator frequency is set by the rc network that is connected at pins 9 10 and 11.
Also this projects we can use jumbo digital clock using simple cmos ics. Alternatively the digital alarm clock circuit can also be used to turn on off and electrical appliance after a specific time. As may be witnessed in the given diagram the heart of the circuit is formed by the ic1 lm8560 which is assigned with the following outputs terminals. When a low state input voltage is applied to the reset pin the operation of the 555 gets interrupted.
