i need help creating an ac to dc power supply.
i need its schematic diagram.
our project should include a circuit breaker once the load shorts
and it should have an indicator when it shorts and should include a reset
button.
me and my group mates are having problems in making it.
really hope that someone can help us.
thank you.
Are you in post-secondary? Because if you are you should have some idea about what to do (it's even more obvious if you have a parts list)
Surely someone in your group has "some" idea. Ask your lab TA.
It's done in a few different stages. What are the biggest differences between AC and DC? You make circuit stages to change progessively smaller differences (you deal with the largest differences first).
I need a schematic for a 20 volt max and 3 to 5 amps. It is to power a large scale train layout. I have been pricing the market supplies and they are pretty pricey. So I thought if I could make one for less money than great. I do need to mention that it is for my brother to build (he has some electronics experience) since I have no experience what so ever.
Thank you for the help,
Matt
I need a schematic for a 20 volt max and 3 to 5 amps. It is to power a large scale train layout. I have been pricing the market supplies and they are pretty pricey. So I thought if I could make one for less money than great. I do need to mention that it is for my brother to build (he has some electronics experience) since I have no experience what so ever.
Thank you for the help,
Matt
NO 12v is not enough, it's a large scale train (for outside) not Ho. It will run fine on 18v Yes I want it to be variable.
Like I said, I have no experience at all when it comes to electronics. I was just wondering where I could find a diagram.
Is PWM control of the trains appropriate as opposed to linear? Varing the voltage by any significant amount at 3-5A will waste a lot of power. PWM doesn't waste much power, so you can build a 20v supply (probably unregulated is fine) and use a PWM control after it. The only potential drawback being a slight buzz as the trains slow down (buy hey, it'll be just like a real electric train that way!).
My brother had built one back in high school, and it's the one I use for my outdoor train. I want to build one for my father since his little starter power "pack" won't run anything with lights and a smoke unit.
The one I am uising is a 15amp 25v variable. I am not sure of the other specs.. He has long since forgoten how he built it, and I found this forum and thought I would give it a try.
Sorry that I do not know anymore than what I told you.
Matt M.