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Multi-channel Display Circuit Composed of CD4017

2016-12-11 06:48  
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Multi-channel Display Circuit Composed of CD4017
As seen in the pciture, when two CD4017's output terminals are connected in a certain combination and are added some corresponding control circuits, there will be a multi-channel output states display circuit. The circuit consists of two CD4017, three transistors and fifteen LEDs, and it is 15 circuits output display circuit. In the circuit, IC2 uses 5 output terminals of Q0-Q4. IC3 uses 3 output terminals of Q0-Q2. IC2's 5 output terminals are divided into 3 groups which are connected 15 LEDs in parallel. Every group of 5 LEDs are controlled by IC3's 3 output terminals through VT1-VT3 and are displayed in 3 groups.