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Questions tagged [ac-dc]

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Design and implementation of safe and efficient AC voltage to DC voltage supplies. Typically Mains to some lower DC voltage.

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Score of 2
2 answers
561 views

It seems all of my home's ACDC conversion (for LED lighting, dishwasher, computers, televisions, etc) has no "Power Factor Correction" and therefore only draws power at the peaks of the 120V ...
Score of 2
1 answer
543 views

I am working on an amplifier that requires a 30V 10amp DC power supply. I want to build this myself to house the converter from 120V wall AC to DC inside of the speaker's chassis itself, mostly to ...
Score of 0
0 answers
83 views

I have this Spa Face Device which basically takes 220V input and converts into a DC voltage (my guess would be 12V probably). This device stopped working, and when I was handed over, I opened it up ...
Score of 3
1 answer
134 views

Attached is a condensed schematic for a design I inherited, I am attempting to migrate this design to another form factor and want to improve it along the way, this thing is incredibly inefficient and ...
Score of 1
1 answer
126 views

The image attached consists of a circuit which I reverse-engineered from a battery charger. I am not able to identify the topology used. How does it work?
Score of 0
1 answer
132 views

I am building a desk for my 3D printing. I will have 4 units that feed filament into the printer and each also has a drying function built in (Bambu AMS Pro 2). While drying each unit draws 80 W, ...
Score of 1
0 answers
86 views

I've had an idea to develop a flyback power supply for LEDs, MCU and sensors. LEDs will be dimmable from the MCU, either with PWM or manipulation of feedback path with an OpAmp. I've stumbled upon two ...
Score of 10
4 answers
1043 views

Impulse buying. While I don't expect it to pass the safety best practices nor the cleanest 12V, I have to be sure what I bought is not going to burn down the house. :) Still learning Elec, but as far ...
Score of -3
2 answers
200 views

I have created an AC-DC converter by using only linear elements on Falstad. My way of thinking is like this: Start with a (co)sine wave as input. We know that the (co)sine wave has a transfer function ...
Score of 0
3 answers
124 views

Hi what I am proposing this enters the area of fantasy I believe but I will give it a shot..Suppose you have a circuit with a switch and pull down resistor connected to a 5V source.When you close the ...
Score of 0
0 answers
76 views

I have an RO60 KV115 Lite alternator without a hall model. Using this alternator, I want to design a three-phase full-wave rectifier circuit using a shotkey at 8000 rpm. What will the DC output ...
Score of 1
3 answers
224 views

Ok peeps, this is not a discussion of the safety or advantages/disadvantages of Transformerless Power Supplies (TPS) as there are many on this QA already. Rather for those who have already decided to ...
Score of 0
1 answer
126 views

I'm trying to simulate this AC-DC rectifier circuit for power supply and expect to see a ~320V DC output, but the simulation shows a short circuit (0V output and ~80A input current). I must be missing ...
Score of 0
0 answers
62 views

I have been reading about the Wikipedia article on negative resistance and in particular, I'm interested in this circuit (also linked at Wikipedia): I was wondering if we could convert this into DC ...
Score of 3
1 answer
125 views

I have a t.c. electronic M3000 with SMPS which has a very bad reputation. For my particular case it has a very weird problem: when device is powered-up (BROWN is ~3.3V, so Q4 is saturated), it works ...

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