Hello all,
im designing (implementing?) a diy variable power supply around the lm338. inspired by dave's usupply but taking my own direction.
that linear regulator has a minimum worst case load of 5mA according to the datasheet, so i was thinking of a solution hopefully not recurring to a current source ic and keep it discrete.
i ended up with this bjt current source
http://tinyurl.com/y8nctaop the 5v will be fixed (maybe 3.3v later on)
is this a good enough solution?
any draw backs that im missing of?
thank you in advance.