Hello community,
I'm working on a 1.5A 0-30V full wave bridge rectifier regulated DC Power Supply. I have run into a recurring problem. No direct and simple answers for what I need exactly. There are tutorials, but they don't answer many questions. I have read a lot(10 or so) of forum posts and tutorials on designing a power supply. I have tried using a designer program, that was last updated 4 years ago
What I know so far: Requires a Transformer, 4 diodes or a rectifier ic, a smoothing capacitor, and some kind of voltage and amp regulation. Filters (RC, LC, RLC, EMI, etc.) can be added with the smoothing capacitor. Voltage can be adjusted via a LM3xx Mosfet circuit, higher current varies require a heatsink on the Mosfet. A diode should be use to prevent a short. There are ways to regulated/adjust current.
My questions:
My wall power specs: 120V 60Hz (US Mains Power)
Please if you can, provide formulas. So others people can figure these things out. I'm a semi-experienced high school junior (I know the basics of electronic, ohms Law, how circuits works and how to solder) so please try to make it simple for me and others to understand.
A million thanks,
Andy
I'm working on a 1.5A 0-30V full wave bridge rectifier regulated DC Power Supply. I have run into a recurring problem. No direct and simple answers for what I need exactly. There are tutorials, but they don't answer many questions. I have read a lot(10 or so) of forum posts and tutorials on designing a power supply. I have tried using a designer program, that was last updated 4 years ago
What I know so far: Requires a Transformer, 4 diodes or a rectifier ic, a smoothing capacitor, and some kind of voltage and amp regulation. Filters (RC, LC, RLC, EMI, etc.) can be added with the smoothing capacitor. Voltage can be adjusted via a LM3xx Mosfet circuit, higher current varies require a heatsink on the Mosfet. A diode should be use to prevent a short. There are ways to regulated/adjust current.
My questions:
- What specs for a transformer do I need to figure out?
- What kind of Capacitor do I need and how many?
- How many uF, nF or mF do i need for a minimal ripple (maybe <5%)
- What difference do those filters make (I know that EMI stops interference from radio waves)?
- Is 1.5A a good current for powering and testing circuits?
- Is it a good idea to add a Zener Diode voltage regulator with the LM3xx Mosfet?
- What should the amp rating on the fuse be?
- Is surge protection needed?
- (Optional but curious about)
- What kind of On/Off LED should i uses? I was thinking a piranha super flux.
- Are there any cool or unique fuse holders? I was hoping for a spring loaded, turn locking sliding fuse holder.
- Short indication via a LED? I have seen it with a PNP gate.
- I'm considering adding a USB socket for charging devices, what should the voltage and amps be for fast charging?
- What's the pro and cons of using the different kinds off output sockets? Banana plug, Weidmuller, Speaker Spring, etc.
My wall power specs: 120V 60Hz (US Mains Power)
Please if you can, provide formulas. So others people can figure these things out. I'm a semi-experienced high school junior (I know the basics of electronic, ohms Law, how circuits works and how to solder) so please try to make it simple for me and others to understand.
A million thanks,
Andy