Such as title
and I want to use 8051 and 1602 alphanumeric LCD display module and buzzer to do a 3X4 keypad
For example a number board
7 8 9
4 5 6
1 2 3
. 0 -
Also,
Can this device detect more one button at a time?
Such as title
and I want to use 8051 and 1602 alphanumeric LCD display module and buzzer to do a 3X4 keypad
For example a number board
7 8 9
4 5 6
1 2 3
. 0 -
Also,
Can this device detect more one button at a time?
There is plenty to choose from on the WWW, here is another example:
**broken link removed**
As the keypad is connected as a matrix, when you read a raw (or a column) you can read 3 (or 4) buttons in one instruction, so the answer is YES, but not from different raws (or columns) ..