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Small green rectangular circuit board with a circular copper touch pad and a red LED, 20 by 28 mm

Adafruit

Adafruit Momentary Capacitive Touch Sensor Breakout 20 x 28 mm

SKU CH-35YM-6DR6D

A momentary capacitive touch sensor breakout with a red LED indicator, operating from 1.8 to 5.5 VDC in fast mode drawing about 0.5 mA

  • TypeSensors
  • Momentary capacitive touch sensor with red LED indicator
  • Responds in fast mode drawing 0.5 mA
  • Power-saving option by disconnecting LED from output pin
  • Operates from 1.8 to 5.5 VDC supply voltage
  • Compact 20 x 28 mm breakout weighing 1.87 g

Single Momentary Capacitive Touch Breakout

This breakout board provides a single momentary capacitive touch sensor for simple interactive projects. It operates from 1.8 to 5.5 VDC and measures 20 mm by 28 mm. The sensor activates when a capacitive load is detected, making it suitable for basic touch interfaces. The compact 1.87 g board fits easily into small enclosures.

Red LED Indicator and Configurable Fast Mode

A red LED lights when the pad is touched and the output pin goes high, giving immediate visual feedback. The LED can be disconnected by cutting a jumper trace to reduce current draw. Fast mode offers more responsive detection at about .5 mA, while an ultra-low power option of ~50 uA is available by modifying the mode jumper. A centre pad allows soldering a wire for a custom external sensor.

Voltage Range and Current Draw Limits

The sensor works across a 1.8 to 5.5 VDC supply range but does not regulate voltage internally. Current consumption depends on the selected mode, with fast mode drawing about .5 mA and ultra-low mode around 50 uA. Output logic levels follow the supply voltage, so level shifting may be needed for some microcontrollers. The board has no built-in debounce or toggle functionality.

Highlights

  • Momentary capacitive touch sensor with red LED indicator
  • Responds in fast mode drawing 0.5 mA
  • Power-saving option by disconnecting LED from output pin
  • Operates from 1.8 to 5.5 VDC supply voltage
  • Compact 20 x 28 mm breakout weighing 1.87 g

Specifications

TypeSensors

Questions about this item

Does the red LED on the capacitive touch sensor breakout need replacement or can it be disabled for maintenance?

The red LED lights when the pad is touched and can be disconnected by cutting the trace at the marked jumper to save power without replacing any component.

What voltage limit defines the operating range for sustained use of this touch sensor breakout?

The board operates from 1.8 to 5.5 VDC; staying within this range is the electrical limit for continuous operation.

How much power does the sensor draw in fast mode when running all day?

In the default fast mode the sensor draws about 0.5 mA; cutting the mode jumper and soldering the other side reduces draw to roughly 50 µA for ultra-low-power use.

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