Tutorial on how to modify an old radio power supply to convert it into a variable and regulated power supply with the DPS5005 module.
DPS5005 on ebay:
https://ebay.us/hxGUJW
Other power supply with lower specs:
https://ebay.us/P4IYAS
The cheap power supply:
https://ebay.us/Pi9q1i
If you have interes in my tools, here there are links to buy them:
X-acto knife:
http://ebay.us/kHDyjf
PCB holder:
http://ebay.us/A2EnwG
Precision tweezers:
http://ebay.us/lz23B3