ChatDiagram
ELECTRONICS

TTP223 Touch Switch for AC Appliance

A worked electronics example, rendered live. Open it in the AI editor and adapt it to your own case.

UPDATED 2026-08-13
TYPECircuit
USE-CASETtp223 Touch Switch
EXAMPLETTP223 Touch Switch for AC Appliance
Make this diagram your own.

Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.

CASE ANALYSIS

Scenario

A TTP223 capacitive touch sensor needs to switch a mains-powered AC appliance safely through a relay, with transistor drive and flyback protection.

Key decisions

  • Use an NPN transistor to sink relay coil current from the TTP223 output
  • Keep AC and DC grounds isolated by using a separate neutral net
  • Include flyback diode across relay coil and fuse on live

When to reuse this

Reuse for any low-voltage touch or control signal switching an AC load via relay.

← See more ttp223 touch switch examples
Open this example in the editor →

Tweak it with chat, export PNG/SVG, or fork it for your own use case.