Aug 3, 2014 #1 S sunnystar Junior Member level 3 Joined Aug 3, 2014 Messages 29 Helped 0 Reputation 0 Reaction score 0 Trophy points 1 Activity points 175 my project block diag: keypad(input)=>pic16f877a=>max232=>DTMF encoder=>RF 433 ASK Tx => RF 433 ASK Rx=>DTMF decoder=>max232=>pic16f877a=>relays the data is being correctly transmitted and received using max232. so in cross questioning if i asked why i'm using max232 is then what will be the answer?? plz help me
my project block diag: keypad(input)=>pic16f877a=>max232=>DTMF encoder=>RF 433 ASK Tx => RF 433 ASK Rx=>DTMF decoder=>max232=>pic16f877a=>relays the data is being correctly transmitted and received using max232. so in cross questioning if i asked why i'm using max232 is then what will be the answer?? plz help me
Aug 5, 2014 #2 zeyad.kassaby Member level 2 Joined Jun 17, 2007 Messages 42 Helped 4 Reputation 8 Reaction score 4 Trophy points 1,288 Activity points 1,528 max 232 is mainly to convert voltage level from ttl to -9vdc / +9vdc and also curren amp to prevent damage for pic ic used hope it helps ziad
max 232 is mainly to convert voltage level from ttl to -9vdc / +9vdc and also curren amp to prevent damage for pic ic used hope it helps ziad