TTP223 Touch Key Module Self-Locking

A TTP223 Touch Key Module in self-locking mode is a capacitive touch sensor that, when a touch is detected. Also toggles its output state and remains in that state until touched again, similar to a toggle switch.

Soldering of TTP223 Touch Key:

This functionality is activated by setting the “B” pad on the module to a high logic level. Also, often by soldering the jumper between pads “A” and “B” or by using the default setting.

The module operates at a voltage between \(2.5V\) and \(5.5V\). Furthermore can be embedded in non-metallic materials like plastic or glass for a concealed design.

More Details:

Functionality of TTP223 Touch Key: Instead of acting as a momentary push button. Also, the self-locking mode keeps the output “on” after a touch and “off” after another touch.

Activation: The self-locking mode is enabled by setting the “B” pad to a high logic level. On many boards, this is achieved by shorting the “A” and “B” pads with a jumper.

Output: In the “self-lock, High TTL level output” configuration (AB=01). Furthermore, the output will be a high digital signal when active and will change state each time the pad is touched.

Applications: The module is ideal for projects where a mechanical switch is not desired. Also, allowing for a sleek and concealed interface on surfaces like walls or desks. It can be used for home automation, custom control systems, or replacing traditional buttons in a project.