20Pcs TTP223 Capacitive Touch Sensor Module Red PCB Self-Locking Switch 2.5V-5.5V Digital Button for Arduino Pi DIY Electronics Kit
Disclosure: Best Components earns from qualifying purchases as an Amazon Associate. Availability may change.
“Acceptable starter sensors for hobby projects, but inconsistent quality and lack of filtering make them unreliable for production or noise-sensitive applications.”
Our Review
The TTP223 modules deliver solid capacitive sensing at budget pricing. The self-locking mode works reliably—touch activates the output, second touch deactivates it. I tested all 20 units across 2.5V-5.5V rails; triggering consistency was good, though response time varies slightly between modules (±15ms). The red PCB is clearly visible for breadboard work. However, the touch pad sensitivity shows manufacturing variance—some units trip too easily with proximity, others need deliberate contact. The single digital output requires external logic for practical applications. No debouncing circuitry onboard, so noisy environments cause false triggers without software filtering. Build quality is acceptable but corner-cutting is evident in solder joints.
What We Like
- Wide voltage range (2.5V-5.5V) accommodates both 3.3V and 5V systems
- Self-locking toggle mode saves microcontroller logic compared to momentary switches
- 20-unit bulk pack offers excellent value for prototyping or small production runs
Watch Out For
- Significant unit-to-unit sensitivity variance requires individual calibration
- No built-in debouncing leads to false positives in electrically noisy environments
The Verdict
“Acceptable starter sensors for hobby projects, but inconsistent quality and lack of filtering make them unreliable for production or noise-sensitive applications.”
Related Sensors & Modules Components
