Usually you can without any problem, the LS is a 'better' version, faster and lower power. The only problems that occur is if the original chip was being used in some strange non-standard way? - but this is fairly uncommon with TTL.
yes it is for this programmer **broken link removed**
after unsuccessat the before 16f84 programmer i desided to make this one that is a parallel port hardware too and hop could use from it with winpic and icprog...
yes it is for this programmer **broken link removed**
after unsuccessat the before 16f84 programmer i desided to make this one that is a parallel port hardware too and hop could use from it with winpic and icprog...
This is the exact schematic I used to build my first programmer. It's just the Classic David Tait design with one pull-down resistor added. It's gonna work fine with any 7407...