TTP223 Capacitive Touch Button
by Generic
SKU: PSA-CMP-TTP223
No reviews yetTypical India street price
₹15–₹40
Touch pad replacing a mechanical switch — modern UI on cardboard.
Interface: Digital
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Concept
A finger changes capacitance; the IC times a charge cycle.
A little theory
TTP223 output toggle or momentary depending on solder-bridge A/B. In the classroom, treat TTP223 Capacitive Touch Button as a beginner part using Digital. Typical India street price is about ₹15–₹40. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
digitalRead like a button. Can sit behind 3 mm acrylic.
Classroom & project use
- Lamp touch
- Quiz pads
- Wearable UI
Buying in India
Precautions
- Check 3.3 V MCU compatibility before connecting signal pins
- Share a common GND with the microcontroller
Specifications
| Chip | TTP223 |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 2–5.5V |
| Interface | Digital |
Pinout
See module silkscreen: typically VCC, GND, and signal pins. Confirm labels against the seller photo — clones vary.
