We have several utility 74LS90 IC, as a practical clock in this circuit show a generator unit square pulse provided by the LM555, we have our own clock by attaching a little more patience we have a full alarm clock and other features.
Used Components.
- 3 CI 74LS90.
- 3 CI 74LS47.
- 3 Common Anode Display.
- 3 Ohm Resistor 100R 1 / 2 Watt.
- 3 Ohm Resistor 330R 1 / 2 Watt.
- 1 1K ohm resistor 1 / 2 Watt.
- 1 buttons.
- 1 LM555.
- 1 Potentiometer 50K Ohm.
- 1 10uF 16V electrolytic capacitor.
- 1 100nF Ceramic Capacitor.
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