Electronics > Beginners
Can I build an AC/DC SMPS in 1 month?
mariush:
I think you're pointlessly complicating your life.
If you have to make a project with ONE transistor why make a SMPS? It's like making a plane because you must do something with a wheel.
Here's a project idea: use transistor as on/off switch.
For example make a device to dry hands that's turned on without touch.
Have an arduino, an infrared led and an infrared sensor... when hand goes under fan area, it breaks the invisible infrared and your arduino then turns on a 80/92/120/140mm fan powered from 12v using a transistor.
Transistor lets you turn on a 12v device using 5v of arduino.
Or instead of fan , think of it as alarm... have hall effect sensor on door edge, magnet on door... if door opens magnet goes away so sensor reports that and arduino reads that and plays alarm on piezo speaker using transistor.
could use a 555 to generate sound but arduino and pwm would be easier
see
https://www.murata.com/en-sg/support/faqs/products/sound/sounder/char/sch0001
https://electronics.stackexchange.com/questions/15629/driving-piezo-buzzer-from-mcu-pin
http://hades.mech.northwestern.edu/index.php/Driving_a_piezo_speaker_with_a_PIC
https://www.eevblog.com/forum/projects/how-to-connect-a-piezo-speaker-to-a-microcontroller/
Kill two rabbits with one project.
KEIN NEIN:
Electric engineering degree, and yes I'm aware of the risks involved when working with mains voltage
KEIN NEIN:
I guess I'll come back whenever I've made up my mind, I have to read the PSU cookbook but as of right now I believe I'll opt for a flyback PSU bc I believe it can power a few PSU devices and it's not so complex in design
Correct me if I'm wrong
Thanks anyway
KEIN NEIN:
I am aware I am overcomplicating otherwise I wouldn't plan on building an SMPS don't you think so?
TimNJ:
I would not rush working on a mains switch-mode power supply. Seriously, even though you may have some ideas about the dangers of working with mains, if you have never really worked on something like this before, now is not the time to rush it. There are lots of things to be cognizant of, from both design and test standpoints. Doesn't mean you shouldn't do it in the future, of course.
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