The block diagram below shows the electronic module. Of each module through its corresponding transistor. RA1 for master reset (MR) and RA2 for activation (CP0) There are 2 control signals for the 4017 counter: The pattern of activated segments in each module is defined by the state of PORT B port outputs (RB0. Giving the impression to the human eye that the LEDs are permanently on. This multiplexing is performed at a frequency of about 100 Hz, ![]() Resistors, 3 BC337 transistors and a 4017 decade counter circuit.Īll components can be purchased at any electronics store.ħ segment modules are activated one by one in sequence, through a decade counter 4017. With an LCD, a seven segment display or aĮntire module includes three 7 segment displays, 8 When you need to display large numerical information in a microcontroller system, the 7 segment LEDs modules are the cheapest circuits, and the electronic design is quiteĬonnected to a standard LCD interface, so your system may work
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