Touch switch electronic circuit based on a Schmitt trigger

Subscribe by email

scheme circuite electronice

This touch switch electronic circuit is based on a Schmitt trigger with latching, built IC1a, IC1b and R3. IC1b's output signal comes back to IC1a input through R3, resulting in maintaining stable condition of both gates. While the circuit is at rest, the anode of D1 is at "0" and the cathode of D2 is at level "1" retain their status.
When contact is shorted by finger touch, the voltage drop across R8 increases. This increase is translated into a short pulse of R1-C1. This pulse transmit through D1 a “ 1” at input of ICla. IC1b's output and output will also go to "1".
When C2 is charged circuit is ready to change the status of the next stimulus appeared on R1. This momentum will make it output IC1a become "0", in which the output of IC1b becomes “ 0 “ C2 voltage decreases. Output is again,, 0 "circuit again is at the point from which it started.

\/\/\/\/\/\/\/\/\/ View similar circuits /\/\/\/\/\/\/\/\/

Bio-electronic interface for biofeedback devices electronic project
Delayed turned off light circuit diagram
Electronic fuse circuit diagram project
Liquid detector electronic project circuit diagram using transistors
Circuit Diagram: 
Touch switch electronic circuit Schmitt trigger


Hi looking for a circuit

Hi looking for a circuit diagram speed sensor or the magnetic method is to be combined with microcontroller programming &design software cadence, I appreciate your help

Post new comment

The content of this field is kept private and will not be shown publicly.
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Enter the characters shown in the image.