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Membrane Keypad 4×5
Durable 4×5 membrane keypad with 20 tactile keys arranged in a matrix format. Ideal for numeric or custom function entry in embedded and control systems.
Specs:
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Layout: 4 Rows × 5 Columns (20 keys)
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Keys: 0–9, A–D, *, #, and 4 user-definable
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Interface: 9-pin flat flexible cable
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Rated for over 1 million key presses
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TTP229 4 Keys Capacitive Touch
A 4-key capacitive touch sensor module based on the TTP229 IC. Offers sleek, non-mechanical input with high sensitivity and low power usage.
Specs:
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Chipset: TTP229
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Keys: 4 capacitive touch pads
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Output: Digital (active-low)
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Interface: Standard digital I/O
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Supply Voltage: 2.4V – 5.5V
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Size: 35mm × 29mm
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Response Time: < 60ms
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