bibinjohn

it is not a big problems if u used 74374,74244 and a 4X16 decoder use dataport for input and o/p decoder to the control port In this case u can get 120 i/o . 64 input +56 outputs as u wish see this link http://booksbybibin.14.forumer.com/viewtopic.php?t=53 Bibin John www.bibinjohn.tk

just install userport.zip http://booksbybibin.14.forumer.com/viewtopic.php?t=74 bibin John www.bibinjohn.tk

see some design tips for H-bridge http://booksbybibin.14.forumer.com/viewtopic.php?t=130 Better go for MOSFET because MOS is voltage controlled while bjt is current controlled Bibin John www.bibinjohn.tk

see the designing steps of H-bridge http://booksbybibin.14.forumer.com/viewtopic.php?t=130 Bibin John www.bibinjohn.tk

if you are a beginner go for parallel port, here are some examples http://booksbybibin.14.forumer.com/viewforum.php?f=4

if it is of 6 wire then you can use it as unipolar as well as bipolar, read this then u will understand http://booksbybibin.14.forumer.com/viewtopic.php?t=42 Bibin john www.bibinjohn.tk

See these IC tester using parallel port http://booksbybibin.14.forumer.com/viewtopic.php?t=55

ya the relay of 12V should have a voltage greater than 12V. See this link http://booksbybibin.14.forumer.com/viewtopic.php?t=33 Bibin John www.bibinjohn.tk