1129 B - Touch sensor
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The 1129 is a capacitive touch sensor and can detect a touch through plastic, glass, or paper. We recommend a material thickness of up to 1/2”.
The sensor can work as a close proximity sensor, sensing objects at a distance of up to 1/2” from the board in all directions without direct contact.
On the bottom side of the Touch Sensor there is a small exposed metallic pad. A soldered connection can be made to the pad to increase the size and dimensions of the touchable area, such as attaching the sensor to a metallic object or some wire.
The 1129_1B has a sensing chip that recalibrates after 45 seconds of contact (as opposed to 60 seconds on the 1129_0). Other than that, this sensor will function the same as the 1129_0. Please refer to the table below to see the differences:
Comparisons with previous versions
| Feature | 1110 | 1129_0 | 1129_1 or 1129_1B |
|---|---|---|---|
| Sensitivity (Thickness of Material) | 1/8" | 1/2" | 1/2" |
| Sensor value (voltage) when Touching | 0 (0V) | 1000 (5V) | 1000 (5V) |
| Recalibration Timeout | N/A | 60s | 45s |
Product Specifications
| Sensor Properties | |
|---|---|
| Sensor Type | Touch (Capacitive) |
| Controlled By | VoltageRatio Input |
| Sensor Output Type | Ratiometric |
| Detecting Distance Max | 12.7 mm |
| Electrical Properties | |
| Current Consumption Max | 500 μA |
| Output Impedance | 1 kΩ |
| Supply Voltage Min | 1.8 V DC |
| Supply Voltage Max | 5.5 V DC |
| Physical Properties | |
| Operating Temperature Min | -40 °C |
| Operating Temperature Max | 85 °C |