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Touch-type multi-channel electronic switch CD4017 CD4511 CD4518 circuit

Published on Apr 18 2011 // Switch Control Circuits

The simple touch electronic switch, reliable, versatile digital integrated circuits using low cost. It has 20 channels for selection, the circuit with a two-digit display for the channel display, circuit as shown. Circuit by a touch signal input circuit, the control pulse forming circuit, channel selection and channel decoding circuit and display circuit.
Touch signal input circuit formed by the transistor switching circuit VT1:

 Touch-type multi-channel electronic switch CD4017 CD4511 CD4518 circuit

channel decoding and the digital display circuit:

 Touch-type multi-channel electronic switch CD4017 CD4511 CD4518 circuit 1