Hey Guys. I'm working on a project where we are making a power supply. The first step, we imagine, is to use a transformer to step-down the total voltage. The problem is, however, that we don't know where to find a step down transformer. All the ones we find seem to be step-ups. Also, we want that is cheap and simple. This would be something that isn't mechanical or digital and that we could just sorta attach with our circuit.

I personally haven't been able to find anything like that. Maybe I'm not looking well enough but I suspect I'm missing something. All responses are appreciated. We are still in early development. Thanks!

 

99% of the transformers you can find for sale are step-down transformers. This says that either you did not try or you don't know what a step-down transformer is. You did not say what voltage or current or power you want. Are we supposed to guess?

This makes us hesitant to tell you to plug something into a wall outlet.

 

Unfortunately since you choose (there is a choice) not to include your location it makes it about as difficult as can be to suggest where to get a step down transformer. Next since you choose not to provide what voltage you wish to step down and to what, makes it even more difficult for anyone to suggest much of anything and finally since you choose not to make any mention of current that rules out any possible suggestion. OK, I suggest Allied Electronics and buy a Stancor P-8662. There we are, all done.

Ron

 

Why make a power supply when you could rescue one from the recycle yard for free?

 

99% of the transformers you can find for sale are step-down transformers. This says that either you did not try or you don't know what a step-down transformer is. You did not say what voltage or current or power you want. Are we supposed to guess?

This makes us hesitant to tell you to plug something into a wall outlet.

Okay, I understand that I sound pretty stupid for asking this, butthis is my first time shopping online electronically though. The thing was that I was in a category called "Switching Converter, SMPS Transformers" and completely overlooked the proper category "Power Transformers" and I panicked because even my Googled results where all unusual. That being said, I think this is solved.

 

Why make a power supply when you could rescue one from the recycle yard for free?

It's a school project. I have to come up with my own circuit and implement it.

 

It's a school project. I have to come up with my own circuit and implement it.

Only three components required.!
http://www.raspyfi.com/power-supply...hould-know-about/stepperpowersupplyschematic/
Max.

 

Only three components required.!
http://www.raspyfi.com/power-supply...hould-know-about/stepperpowersupplyschematic/
Max.

Yes this is good, but there are more specifications which make including a zener diode and/or voltage regulator necessary

Variable Output (2 VDC to 12 VDC):

Lowest output voltage: 2 VDC or less

Highest output votlage: 12 VDC or more

Continuous full-load output current: 500 mA or more

Maximum ripple @ 500 mA: 2% (240 mVpp for 12 VDC)

 

Cheat with this
http://www.banggood.com/DIY-LM317-A...ly-Board-Learning-Kit-With-Case-p-964548.html

 

It's a school project. I have to come up with my own circuit and implement it.

CAMERON!!! This is your teacher!!! I'm a member here also, come to my office first thing tomorrow to talk about why you are here when you are to do your own circuit!!!