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Up Counter

An up counter simply counts from 0 to 9. We can use this circuit to make digital object counter. This circuit can also be used to make a digital clock.
We need following components for making an up counter.

  1. 555- configured in astable mode
  2. 7490- decade counter- Click here to get the datasheet
  3. 7447- BCD to seven segment display- Click here to get the datasheet.
  4. Seven segment display- Common Anode

Here, CC-Common Cathode and CA-Common Anode.

6. Resistors- see the schematic
7. Capacitor- see the schematic
8. LED
9. Power supply