Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 2.0V - 5.5V DC |
| Interface Type | Capacitive Touch (4 Channels) |
| Response Time | Approx. 60ms at VDD=3V, CL=10pF |
| Output Mode | Direct Output / Toggle Output (Selectable) |
| Sensitivity Adjustment | Via External Capacitor (1pF - 50pF) |
| PCB Dimensions | 28mm x 17mm x 1.6mm |
| Mounting Hole Size | 3.0mm diameter |
| Operating Temperature | -40°C to +85°C |
| Quiescent Current | Typically 3.0µA at VDD=3V |
| Package Includes | 1x TTP224 Module, 1x Pin Header Strip |
Anonymous
Mar 30, 2026
Rating: 4/5
Solid performance
Integration with ESP32 was straightforward. The only reason for 4 stars is that the soldering pads are a bit small for beginners, but otherwise, it's a great sensor.
Anonymous
Mar 18, 2026
Rating: 4/5
Good value, minor calibration needed
Works well for the price. I had to add a small capacitor to one channel to stabilize it against false triggers, but once calibrated, it has been reliable for my home automation setup.
Anonymous
Mar 17, 2026
Rating: 5/5
Compact and efficient
The low power consumption is a huge plus for my battery-powered project. The board is small enough to fit into tight enclosures without issues.
Anonymous
Mar 17, 2026
Rating: 5/5
Reliable for student kits
Bought ten of these for our workshop. All units functioned correctly. The direct output mode is very responsive, making it ideal for teaching basic input concepts.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for DIY Projects
This module works flawlessly with my Arduino Uno. The sensitivity is great right out of the box, and I was able to detect touches through a thin plastic case. Very easy to wire up.
Anonymous
Mar 13, 2026
Rating: 5/5
Exceeded expectations
I was worried about interference from nearby components, but the shielding on this board seems adequate. It registers touches accurately every time.
Q: Is a library required to use this with Raspberry Pi?
A: No external library is strictly necessary. Since the module outputs a simple digital HIGH/LOW signal, you can read the state using standard GPIO functions in Python or C++.
Q: What is the maximum current this output pin can source?
A: The output pins are designed for logic level signaling. They can typically source/sink around 4mA to 8mA, which is sufficient for driving an LED directly or feeding into a microcontroller input, but not for high-power loads.
Q: How do I switch between toggle and direct output modes?
A: The module usually comes with soldering pads labeled AHBL or similar. By bridging specific pads with solder as per the datasheet diagram, you can select between direct (momentary) and toggle (latching) modes.
Q: Can this module detect touch through glass or acrylic?
A: Yes, the TTP224 can detect capacitive changes through non-conductive materials like glass or acrylic, provided the material is not too thick (typically under 5mm works best).
Q: Does this come with headers pre-soldered?
A: No, the module typically ships with a separate pin header strip to allow flexibility in mounting orientation. You will need to solder them on yourself.
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