power supply (helper) prototype for developments boards
power supply 7.5v - 12v with together gnd
multiple 3.3v outputs
multiple 5v outputs
multiple 4.2v outputs (can be changed throught potentiometer)
multiple 4.0 outputs (can be changed throught potentiometer)
4x4 level shifter (5V <=> 3.3V)
reason of developing this power supply and ttl converter
during developments faced different module which consume more power or with non standards power request (example sim800l need 4.0 or 4.2 power source)
and supported male/female pins too.
and sensors/modules that need 5v but to work with 3.3v level …