3x4 Phone-style Matrix Keypad

3x4 Phone-style Matrix KeypadHey, Jenny, I've got your number! And I'm going to dial 867 5309 into this very nice phone style matrix keypad. This keypad has 12 buttons, arranged in a telephone line 3x4 grid. It's made of plastic with sturdy plastic buttons. The keys are connected to a matrix so you only need 7 microcontroller pins (3 columns and 4 rows) to scan through the pad. It's basically a sturdier version of our Membrane 3x4 Matrix Keypad and comes with 7 or 8 header pins

Compatible with RF Explorer Holder

or one stepper motor

} You may have seen those fancy Android people with wireless charging built into their phones

including digital port data latch and signal reshaping amplification drive circuit

replacement parts and warranty for all Geiger Counter products

The power cable wires are not polarity marked

The Current maximum Current of less than 100 ma

-40dBm to -30dBm in 3dB steps

Working Frequency: 125Khz

has USB host port and has full Ethernet and 802

this is a very nice little accessory

This board/chip uses I2C 7-bit addresses between 0x70-0x77