TTP229 16 Key 4×4 16 Channel Digital Capacitive Touch Keypad
This 16 key capacitive touch keypad is based on the TTP229 capacitive sensor with accurate sensing of up to 16 points. Using this keypad provides a solid state alternative to mechnical type keypads providing the advantage of greater durability especially in dusty environments.
Only 2 left in stock
₨ 250 ₨ 350
Only 2 left in stock
This 16 key capacitive touch keypad is based on the TTP229 capacitive sensor with accurate sensing of up to 16 points. Using this keypad provides a solid state alternative to mechnical type keypads providing the advantage of greater durability especially in dusty environments. They kaypad can also be configured in different modes providing various key group options upto 16 independent keys. Outs 1 to 8 on the header connector mimic the sates of the first 8 keys. When is 16 key mode the state of all 16 keys can be read via its 2 wire serial interface. Please see out example Arduino sketch or datasheet for more information on how read the key states via the serial interface.
Please note: By default the keypad is in 8 key mode. To configure it to 16 key mode you will need to link pads TP2 together (see diagram).
- 1x TTP229 16 Channel Digital Capacitive Switch
- Product Code: HCMODU0079
- Operating voltage: 2.4V~5.5V
- Built-in regulator
- Stand-by current At 3V, and sleep mode slow sampling rate 8Hz
=> Typical 2.5uA for 16 input keys
=> Typical 2.0uA for 8 input keys - 8 Key or 16 key modes
- Separate outputs to 8 keys in 8 key mode
- 2 wires serial output interface for both 16 key and 8 key mode
- Outputs can be set to CMOS/OD/OC with active high/low
- 2 Wires serial interface can select active high or low by option
- Optional Multi-key or single-key
- Provides two kinds of sampling rate: slow sampling rate 8Hz and fast sampling rate 64Hz at sleep mode
- Optional maximum key-on time about 80sec
- Auto calibration at power up (keypad must not be touched for 0.5 seconds after power up)
- Auto calibration for changes in environment
