20mA on 8 pins is also too much.
It isn't too much unless you are building for NASA.
In that case, you can add a swich (npn/pnp, depending on your design) on the 595's output.
20mA on 8 pins is also too much.
It isn't too much unless you are building for NASA.
In that case, you can add a swich (npn/pnp, depending on your design) on the 595's output.