Wiring for Toggle and Momentary

These two breakouts are very similar and can be powered by anything from 1.8V to 5.5V DC. Simply connect Ground to GND and the positive voltage to VDD. The standalone sensors are fully functional without further connections.


Toggle Operation

The Toggle version of the sensor turns on when you touch it once, then turns off when you touch it again. The on-board LED indicates the state of the switch.

Momentary Operation

The momentary touch sensor works just like a momentary switch. It is on when you touch it and off when you move away. The on-board LED indicates the state of the switch.

Other Options:

These sensors have several jumper configurable operating modes as described below:

LED Control

The led indicators can be disabled for ultra-low power applications. To disable the LED, simply cut the jumper between the pads where indicated on the back of the breakout board.

With the jumper cut, the LED can be controlled externally via the LED pin on the header.

Speed vs. Power (Momentary Only)

The Momentary version can be configured for "Fast" mode (default) or low-power mode. Fast mode requires 0.5mA. Low Power mode requires just 50uA. To switch between the two, cut the jumper on one side of the "mode" pads and bridge the other side with a drop of solder.

Timer (Toggle Only)

By default, the toggle sensor is configured for infinte time-out. it will stay on until you touch the sensor to turn it off. It also supports a configurable time-out to turn off the output automatically after a delay. To select this mode, cut the 'TIMER' jumper and connect a resistor & capacitor to the TIME pin. For a circuit diagram and resistor/capacitor calculations, see page 13 of the datasheet.

You can also just connect TIME to Vdd and the chip will turn off approx 15 minutes after being turned on. Connect TIME to OUT and the chip will time-out approx one hour after being turned on.

Connecting to your Circuit.

The outputs of these touch switches are 'active high'. Use them like a positive logic signal, or a pushbutton that shorts to VCC.

Simple Motor Control

You can use it just like a pushbutton or logic signal with a transistor or MOSFET to drive high-current loads like a DC motor.
This guide was first published on Jun 29, 2013. It was last updated on Jun 29, 2013. This page (Wiring for Toggle and Momentary) was last updated on Jun 15, 2019.