99 Decimal Counter Project

This tutorial is for advanced users; complete the Hello World tutorial first.

For this tutorial, we are going to be building a 99 decimal counter circuit, which counts from 00 to 99 at an adjustable speed (using the Pulse Generator Circuit) and can be reset to 00 at the push of a button. The circuit consists of three different counting and logic ICs, two seven-segment LEDs, two diodes, a push-button switch, and some resistors. For a more in-depth explanation of the project, check out our white paper.

Learning Concept: How a circuit can take a pulse signal and turn it into a sequential counter. This board drives two seven-segment displays to count from 00 to 99, with adjustable speed (by the pulse generator board) and a reset function. A seven-segment display consists of seven individual LEDs arranged to form the shape of the number 8. By turning specific segments on or off, the display can represent any numeral between 0 and 9. In this circuit, the 74LS93 counters process incoming pulses into binary-coded decimal (BCD) outputs. The 74LS47 decoders convert BCD signals into segment activation patterns for the seven-segment displays. A manual reset button allows for restarting the count.

Our kit includes all the components you need to assemble the 99 decimal counter project. In addition to that you will need conductive ink, solder paste, dispensing tips and an FR1 substrate (3"x4"). If you need another kit, or any other supplies you can grab one from our store:

This circuit requires a stable 5V power supply, like from the pulse generator board, to function properly.

99 Decimal Counter Component Kit

Although this circuit operates normally on its own, we recommend completing the other two projects for a well-rounded learning experience.

Voltage Regulator Project

Pulse Generator Project

Before starting the project, be sure to review the Safety Guidelines for using the V-One.