Jul 12, 2011 #1 D d@nny Full Member level 5 Joined May 28, 2011 Messages 246 Helped 11 Reputation 22 Reaction score 11 Trophy points 1,298 Activity points 3,238 hello how much long cable i can use with keypad as below schematic ?
Jul 12, 2011 #2 alexan_e Administrator Joined Mar 16, 2008 Messages 11,888 Helped 2,021 Reputation 4,158 Reaction score 2,031 Trophy points 1,393 Location Greece Activity points 64,371 The frequency and current are low so you should be able to use long wires but the question is how far do you want to go? Alex
The frequency and current are low so you should be able to use long wires but the question is how far do you want to go? Alex
Jul 12, 2011 #3 D d@nny Full Member level 5 Joined May 28, 2011 Messages 246 Helped 11 Reputation 22 Reaction score 11 Trophy points 1,298 Activity points 3,238 circuit is working on 5v dc . the frequency is 8mhz. i just want to know the very reasonable length with no error .
circuit is working on 5v dc . the frequency is 8mhz. i just want to know the very reasonable length with no error .
Jul 12, 2011 #4 alexan_e Administrator Joined Mar 16, 2008 Messages 11,888 Helped 2,021 Reputation 4,158 Reaction score 2,031 Trophy points 1,393 Location Greece Activity points 64,371 8mhz is the frequency of the mcu core, the frequency that you scan the keyboard is much much lower Alex
8mhz is the frequency of the mcu core, the frequency that you scan the keyboard is much much lower Alex
Jul 13, 2011 #5 D d@nny Full Member level 5 Joined May 28, 2011 Messages 246 Helped 11 Reputation 22 Reaction score 11 Trophy points 1,298 Activity points 3,238 how much log wire i can use ?