Do you want to learn how to set a digital alarm clock?
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With how fast-paced the world is right now, many people wake up early to prepare themselves for the day ahead. Waking up early also allows people to be more productive as they have more time to do more throughout the day. The only problem is that it’s hard to become an early riser on your own.
You will need some help to wake up early. Some people set alarms on their phones, but these are often not enough to wake someone up. The only way to ensure that you get up is to get yourself a proper digital alarm clock.
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These are louder and encourage you to get up to turn them off, helping you wake up in the process. All you need to do is set the clock. Read on and learn how to set a clock.
Types of Digital Clocks
The first thing you must do is know which kind of digital clock you’ll need. Some digital clocks have unique features that set it apart from the rest. In time, people took these features and made different clock types out of them.
A good example of this is the electronic word clock. This started out as a feature where a clock uses an automated voice to tell you the time it is when you pressed a button.
Best Clock Radio For Bedroom
Now, these clocks have their own identity in that they don’t show the time using a numeric display. They use pre-recorded sentences to tell you the time when you press a button. These make them the perfect clock for anyone who focuses on tasks and doesn’t want to break their attention to look at the time.
Tactile clocks are best for people who have visual impairments. They produce a representation of the time for these people to touch. These are often braille that pops out on top of the clock.
If you want a bit of flair in your bedroom, a projection clock is what you’re looking for. These plaster a projection of the time on your wall or ceiling. The best projector alarm clocks will offer you more than you bargained for, too.
Power Up Your Clock
Once you get an alarm clock that you like, it’s time to power it up. You can go two ways when looking for a power source for your clock. Most people go for battery-powered alarm clocks because they’re more convenient.
Lead-acid batteries are on the path to extinction, though. These clocks also mean that you must change the batteries every so often. This makes them a less cost-efficient investment for yourself.
Socket-powered digital clocks are the way to go. While it means you won’t be able to move the clock too far, it will cost you less in the long run. The only problem with these is that they’ll die when there’s a power outage.
You must also be careful of a power surge with these digital clocks. They may overload the clock and damage them.
Familiarize Yourself With the Clock
The first thing you’ll notice is that the clock has many buttons for you to toy around with. Familiarizing yourself with these is the key to mastering your alarm clock. Most modern clocks will have a “snooze-light” button.
Pressing this button prompts a backlight to appear for some seconds. Doing this while an alarm is going makes it go to snooze for 5 minutes by default. You can set the snooze to go from 1-20 minutes if you want.
The “Set” button is what you’ll use most of the time to change the time and set your alarms. This button is often close to the up and down arrows that help you set the time. In some clocks, it’s renamed into the “Clock” or “Time” button.
Set the Current Time
Now that you know what you can do with the different buttons, it’s time to learn how to set a clock. Doing this allows the clock to localize and get accurate weather readings if you got one that connects to the Internet.
You can set the time by holding the “Set” button down for around two seconds. Doing this will allow you to use a 12-hour format or a 24-hour one. Pressing the button once again locks in your selection and proceed to allow you to set the time.
Change the hour setting first into the appropriate hour and press “Set”. Once you do this, you’ll change the minute setting next. Press “Set” again and you’ll change the date this time around.
Keep in mind that you’ll follow the US date format in most alarm clocks. This means you’ll first set the month, then the day, and then the year. Pressing “Set” again after setting the year will save all the changes you made.
Set Your Alarm
Now that the time and date values are correct, setting an alarm should be easy. You only need to press the “ALM-SET” button to get started. Pressing this once will enable or disable the alarm.
To customize your time, you’ll have to hold the button for around two seconds. This puts you into the settings mode and lets you set your desired alarm time.
Same as above, you’ll set the value of the hour first. If you’re using the 12-hour format, the PM light will appear for afternoon and evening hours. Press the same button again to adjust the minute value.
Pressing the “ALM-SET” button once again allows you to save the input as your current alarm. The alarm will now go off at the time you set it on.
Learn How to Set a Digital Alarm Clock Today
Do you want to become a morning person? Waking up earlier is a great way to start on the path to being an early riser. Learn how to set a digital alarm clock and use it to wake up earlier today!
Want to learn more about digital clocks? They can do more than waking you up with an alarm. Check out more of our blogs and guides to learn all you can about these neat devices today!
Alarm Clocks are very useful devices in today’s busy life. They are designed to make a signal / alarm at a specific time. The use of digital alarm clocks has increased over years with development in electronics.
The advantage of digital alarm clocks over analogue alarm clocks is that they require less power, the time can be set or reset easily and displays the time in digits. Design of a simple digital alarm clock is explained here.
Using this digital alarm clock, time can be displayed in 24 HR format using an LED display and alarm can be set to a specific time. Alternatively, the digital alarm clock circuit can also be used to turn ON/OFF and electrical appliance after a specific time.
Digital Alarm Circuit Diagram
Digital Alarm Circuit Components
- IC1 – LM 8560
- IC2 – LM 386
- Duplex LED Display
- T1 – 0-12V / 500mA Transformer
- D1, D2, D3 – IN4001
- R1 – 100K
- R2, R3 – 120
- R4 – 91K
- R5 – 10
- P1 – 10K Potentiometer
- C1 – 470µF
- C2, C3 – 10nF
- C4 – 10µF
- C5, C6 – 100nF
- C7 – 100µF
- B1 – Buzzer
- S1, S2, S3, S4 – Switches
Digital Alarm Circuit Design
The heart of the digital alarm clock is the IC LM8560. It is an alarm equipped digital clock IC. The drivers required to drive a duplex LED display to show the time are in-built to the IC. The functions of the IC LM8560 are display of current time, alarm support, snooze function and supports 12 HR and 24 HR time format.
It is a low voltage audio power amplifier. It is used in the circuit to drive the alarm buzzer. The alarm output of the LM8560 is given to power amplifier through a potentiometer.
Duplex LED Display
In the digital alarm clock, to display the information like current time, alarm notification etc. we use a duplex LED display. There is no need for any extra drivers to drive the display unit as all the required drivers are built in to the digital clock IC.
Push Button Switches (S1 – S4)
These four switches are used to set time, set alarm and turn off the alarm. When setting time and alarm in the digital alarm clock, both Hours and Minutes can be set separately using these switches.
Diodes (D1, D2, and D3)
Diode D1 in combination with the capacitor C1 will produce a DC voltage that is supplied to the IC1 (LM8560). Diodes D2 and D3 act as switch signal generator to the cathode of the duplex display. They work in relation to the input of the LM8560.
The main function of the digital alarm clock is to signal an alarm at specified time. A buzzer is used for this purpose which is driven by an audio power amplifier.
A transformer is used to step down the 220-240 V AC supply to 12 V AC supply.
Digital Alarm Circuit Working
A digital alarm clock is a very useful device as it can display the current time as well as function as an alarming device. The circuit shown above can act as a simple digital alarm clock without requirement of any programming.
The components required and the complexity of the circuit are less. The working of the above shown digital alarm clock is as follows.
As explained in the component description, the heart of the digital alarm clock circuit is the digital clock IC LM8560. The input from the mains is given to the transformer which converts the input voltage to 12V AC.
A diode (D1) and a capacitor (C1) are used to convert this AC voltage to DC and supplied to the Vdd (Pin 20) of the IC1. IC1 (LM8560) works at a frequency of 50/60 Hz. This signal can be supplied from the mains supply using the resistor R1 to the Pin 25 of the IC1.
In relation to the input of the IC1, corresponding inputs to the cathode of the display are given through the diodes (D2 and D3). After switching on the power, we need to set the time. This is the current time to be displayed. In order to set the current time, we use the switches S1 and S2.
Switch S1 is used to set Hours and S2 is used to set Minutes. LM8560 automatically triggers the display connected to it and the time will be displayed on the duplex LED display.
The duplex display is a 4-bit seven segment LED display, where two bits are for displaying the Hours and two bits are for displaying Minutes and the Hour and Minute bits are separated by a colon.
Once the time is set, we can set the alarm using the switches S1, S2 and S3. In order to differentiate between the setting of current time and alarm time in the digital alarm clock, we use the switch S3 which internally triggers the alarm display of the LM8560.
In order to set the alarm, we need to hold the switch S3 and set the Hour and Minutes of the alarm time by using switches S1 and S2 respectively. Once the alarm is set successfully, the digital clock IC waits for the alarm time and once the alarm time is reached, an alarm output at the Pin 3 is generated.
Digital Alarm Clock With Radio
This can be connected to a small buzzer directly for alarm output. But in order to get special alarm tones from the digital alarm clock, we can use special alarm signals. But to drive these special buzzers, we need an audio power amplifier. Hence, the IC LM386, which is a power audio amplifier, is used in the digital alarm clock circuit.
The alarm output of the IC1 (LM8560) is given to the input (Pin 3) of the IC2 (LM386) through a potentiometer P1. The potentiometer is used to control the volume and pressure of the alarm signal from the buzzer.
Once, the digital alarm clock starts the alarm signal, we need to stop this alarm. For this, we use the switch S4. The switch S4 can also be used to cancel the alarm any time before triggering.
This digital alarm clock can also be provided with snooze and repeat alarm facilities. Additional Pins of the IC1 (LM8560) have to be used in the digital alarm clock circuit in order to use these functionalities.
Guidelines & Alternative Components
Digital Alarm Clock Font
- The digital alarm clock can be used to view the current time as well as act as an alarming device.
- Even though the supply given here is from mains, a battery powered device can also be designed. In order to design the digital alarm clock as a battery powered device, we need to use an oscillator to generate a 50Hz Sine wave for the digital clock IC (LM8560) to work.
- Some of the alternatives to the digital clock IC’s are TMS 3450, LM8361 and MM5387.
- The duplex display described in this digital alarm clock circuit is Longtek 6052X-S. Other alternatives can also be found.
- To use the snooze and repeat alarm functionalities of the digital alarm clock, we need to add two more switches to the digital clock IC (LM8560).
- The digital alarm clock circuit can also be used as a timer for electric appliances where they can be turned ON/OFF after a specific time. For this, we need to use an additional pin (Pin 23) on the digital clock IC (LM8560) with a switch. This pin has a sleep functionality.