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Input Voltage 5 - 12 V
it can sense if your plant is already thirsty
Ratio Load Speed (RPM) Max
Built-in charging socket i
An IR blocking filter
4 X 3 Flexible Matrix Keypad Membrane Switch Keyboard USB Cable Input Voltage 5 - 12This Matrix Keypad 3 X 4 has 12 buttons, arranged in a telephone line 3x4 grid. The keys are connected into a matrix,hence only 7 microcontroller pins (3 columns and 4 rows) are required to scan the pad. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 7 microcontroller pins (3 columns and 4 rows) to scan
US$ 15.99
US$ 22.10
US$ 21.99
