This circuit was developed to use a keyboard, often found on the Internet only matrix keyboards can only handle with pic.
This keyboard is unique in using a pic which provides a binary combination of 8 bits, as an example place 10 buttons but can extend to many more all we need is to add more resistors in series, these resistors create a divider voltage to each other, that way we can make the fence ADC converting analog data to digital. Taking and the respective combination can connect a pic, digital gates or any other possible application.
This keyboard is unique in using a pic which provides a binary combination of 8 bits, as an example place 10 buttons but can extend to many more all we need is to add more resistors in series, these resistors create a divider voltage to each other, that way we can make the fence ADC converting analog data to digital. Taking and the respective combination can connect a pic, digital gates or any other possible application.
Used Components:
- 1 ADC0804.
- 1 100nF Ceramic Capacitor.
- 1 Ceramic Capacitor 150pF.
- 8 Ohm Resistor 330R 1 / 2 Watt.
- 9 buttons.
- 11 Resistors 10K Ohm 1 / 2 Watt.
- 1 ADC0804.
- 1 100nF Ceramic Capacitor.
- 1 Ceramic Capacitor 150pF.
- 8 Ohm Resistor 330R 1 / 2 Watt.
- 9 buttons.
- 11 Resistors 10K Ohm 1 / 2 Watt.
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