Interfacing IC555 capacitive touch sensor in proteus simulation

Arduino Proteus Simulation

Interfacing IC555 capacitive touch sensor in proteus simulation

In this article we will learn how to interface IC555 with capacitive touch sensor in proteus.
In the last post we will learn how to make 12v to 240v inverter using Transformer in proteus. You can visit our website,
I hope you appreciate my work, let’s discuss about today’s project.

Components which we use in this project are listed below:

  1. IC 555
  2. Capacitor 10nf
  3. Transistor (BC547)
  4. Resistor (1M)
  5. Resistor 100k
  6. Capacitor (10uf)
  7. Resistor (330R)
  8. Resistor (100k)
  9. LED
  10. Jumper wire

Diagram of this project is below:

Interfacing IC555 capacitive touch sensor in proteus simulation
Interfacing IC555 capacitive touch sensor in proteus simulation

Construction of IC555 capacitive touch sensor in proteus simulation

  • In this project, we are using 555 Timer in collaboration with Capacitive Touch Sensor.
  • A 555 timer is an 8 pin IC. Pin # 6 is called threshold pin and for 555 timer threshold level is 5 volts.
  • So, 555 timer will trigger above 5 volts and it will generate output which can be collected from pin # 3 represented as ‘Q’ which is output pin of 555 timer.
  • While moving toward the simulation of project, first of all place all the components in the proteus workspace, as shown in the image given below:
  • First of all we have place Capacitive Touch Sensor and after that we have placed a NPN transistor,
  • Then 555 Timer will come and at the output of 555 Timer we have added a LED.
  • The complete circuit diagram ready for simulation is shown in the image given below:
  • As long as the finger is out of the vicinity of the electrostatic field, no potential difference occurs and the LED remains in the OFF state.
  • Now if we move the finger towards Capacitive Touch Sensor, and when the potential difference reaches up to 0.6 volts, then 555 triggers and it generates output voltages across LED which are 5 volts but in some cases voltages are lost due to series connected resistances. This phenomenon is shown in below image

Working of IC555 capacitive touch sensor in proteus simulation

An IC555 capacitive touch sensor circuit can be designed using the popular 555 timer IC (integrated circuit) to detect touch or proximity of a conductive object without any physical contact. This circuit works based on changes in capacitance when a conductive object, such as a human finger, approaches or touches a capacitive sensing pad.

Applications of IC555 capacitive touch sensor in proteus simulation

  1. Proximity Switches
  2. Touch-sensitive Lamps
  3. Touch-Controlled Dimmers
  4. Security Systems
  5. Automotive Applications

Advantages of IC555 capacitive touch sensor in proteus simulation

  1. Simplicity
  2. Low Power Consumption
  3. Adjustable Sensitivity
  4. No Moving Parts
  5. Noise Immunity