i would like to increase my voltage output from my input from for example 5V to 12V.... so can i use voltage regulator 78LS12...is voltage regulator used to increase voltage output? is so, how should i connect the 78LS12??
thx
A voltage regulator like 78xx can only regulate to a lower output, the input must be at least 2 volts higher than the output.
You need a step up converter, something like
there are also a couple of online calculator for values of the components that should be used MC34063A design tool **broken link removed** MC34063 boost