One would expect that a power supply for a 400W amp, would be capable of well over that to keep the peaks from distorting. A 10A transformer at 24V is only 240W. how to make 24v DC power supply. for making this project we need some components. Components for making 24v adapter: 12-0-12 or 24V 1 Amp Transformer. LM7824 Voltage regulator. Heat sink. 50v 1000uf capacitor. 1N4007 Diode (4) LED. 1K 1/4W Resistor. PCB Board. Soldering wire. Soldering iron. Circuit Diagram of how to 24v dc power supply: Apply 7805 to 24V power supply. Zener-transistor Regulator. How it works. Parts you will need. 24V 3A Power supply circuit diagram. 24V 3A Power Supply using LM317. Parts list. Easy 24V 3A regulator circuit using LM350. 5A 24V regulated power supply using LM338. Read more: '0-30V 3A Power supply' » Related Posts. 5 Answers. Sorted by: 19. You can open the supply and look for the TL431 chip. There will be two resistors forming a voltage divider from the 5V rail to the 2.5V that the TL431 compares against. If you calculate the right resistor values, you can set this divider to output half the voltage it currently does. Input voltage: 24V AC. Input current: 3A maximum. Output voltage: 0 to 30V continuous adjustable. Output current: 2mA - 3A continuously adjustable. Output voltage ripple: minimum 0.01% Add TipAsk QuestionCommentDownload. Step 1: Tools and Parts Required . Parts List : . 1. Step Down Transformer - 24V, 3A ( Jaycar) 2. QnOew.

how to make 24v power supply