amateur workbench will find an SMPS type 12V 1A or 3A supply. They
are good but tough when they carry a lot of noise along to
This simple power supply is based on a 12V
adaptor as a source to supply 12V at 3A or so and output 3 different
(or same) 1A voltages for our "under test" setup.
In fact, input range
may be of your choice ranging from just over 5V to an 18V notebook
Kits are offered without regulators as there
are too many possibility exists!!