Computer power supplies typically cost around $30, while dedicated lab power supplies often come with a much higher price tag—$100 or more. However, by repurposing inexpensive or even free ATX power supplies found in discarded computers, you can create a highly capable lab power supply without breaking the bank. These units offer impressive current outputs, built-in short-circuit protection, and surprisingly stable voltage regulation, especially on the +5V rail.
This makes converted ATX power supplies an excellent choice for hobbyists, students, or anyone needing a reliable bench power source on a budget. With a bit of modification and setup, you can turn a common computer PSU into a versatile lab supply that rivals many commercial options in both performance and safety features.