Touch Sensor Module (Ideally For Fingers)

Overview

The module is based around the touch-sensing TTP223B IC, aka a capacitive touch switch module.

In the normal state, the module outputs 'low' (see below), and is in 'low power consumption' mode. When a finger touches the sensor, the module output goes high. When the touch is discontinued, the module returns to a low-power state after approximately 12 seconds.

A status LED shows the state. There is no sensitivity adjustment available in the form of a potentiometer, but you can adjust this by optionally replacing C1 with any SMD capacitor from 0 to 50pF (see datasheet).

Can easily replace a momentary switch in many applications.

Specifications

• Power Supply: 2 - 5.5 VDC (3V Typical)
• Mounting: Four M2 Screw Holes
• Output High: 0.8V
• Output Low: 0.3V
• Output Pin Sink: 8mA (VCC = 3V, VOL = 0.6V)
• Output Pin Source: -4mA (VCC = 3V, VOH = 2.4V)
• Response Times:
• Low Power: 220ms
• High Power: 60ms
• Size: 24 x 24 x 7.2mm
• Weight: 2g

Datasheet for equivalent IC: https://datasheet.lcsc.com/szlcsc/TTP223-BA6_C80757.pdf

Note: Exact TTP223B revision is not specified and may vary.