Simple touch switch circuit

Description:-

  • Here is a simple touch switch circuit.

  • This touch sensor is a capacitive touch sensor module and the sensor is based on the dedicated TTP223 touch sensor IC

Circuit diagram

TTP223 Capacitive Touch Sensor

FEATURES:-

  • Input Voltage: 3.3V – 5.5V DC
  • Module size: 15mm x 11mm
  • touch sensing area of 11 x 10.5mm
  • Max sensor range of ~5mm
  • Low power mode typical 1.5uA and maximum 3.0uA
  • Provides Low Power mode
  • All output modes can be selected active high or active low by pad option

Jumper A

Jumper B

Output Lock State

Output TTL level

Open

Open

No-Lock

High

Open

Close

Self-lock

High

Close

Open

No-Lock

Low

Close

Close

Self-lock

Low

APPLICATION:-

  1. Wide consumer products like Touch switches
  2.  Button key replacement

Components Required:-

  1. Single Relay Module
  2. TTP223 Touch Sensor Module
  3. 5 Volt Supply
  4. AC Load and Supply

Relay Module

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