DIY Lab Bench Power Supply (4 in 1) 

PCBWAY link www.pcbway.com
how to make mini lab bench power supply (4 in 1)
adjustable step down voltage 11.7 to 1.2 volt
adjustable step up voltage 11.7 to 58 volt
adjustable current limit 0 to 5 Amper
and 12 , 5 , 3.3 , -12 volt you can used
link
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