Simple 5V power supply - Video | Circuits | Electronics Design The following circuit is the answer to the problem. This circuit can give +5V output at about 150 mA current, but it can be increased to 1 A when good cooling is added to 7805 regulator chip. The circuit has over overload and therminal protection. Circuit diagram of the power supply. The capacitors must have enough high voltage rating to safely Amazon: 5v power supply circuit wwwon›Search›5v power supply circuit1-16 of over 6,000 results for "5v power supply circuit" Showing selected results. See all results for 5v power supply circuit. 0-15 Volt/0-1Amp Bench Power Supply with 5 Volt USB Output. by Circuit Specialists. $32 (1 new offer) 5 out of 5 stars 2.