BCD/Decade counter using 74LS90. Circuit and explanation.

Package includes :

  • PCB
  • 74LS90
  • LED – 4
  • 1K resistor – 4
  • Push button switch

Assemble the circuit as shown in the following image.

Circuit diagram of BCD/Decade counter using 74LS90 is shown below.

Working

Modules required

  1. Voltage regulator module
  2. Astable multivibrator module
  3. BCD/Decade counter module

Step 1 : Power the BCD Counter module from a 5V regulator as shown in the following image.

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