All Questions
Tagged with ac-dc bridge-rectifier
16
questions
1
vote
1
answer
64
views
Ground connections around bridge rectifier in flyback converter
I am designing a flyback converter and I am being told to make the ground net connections as shown in the image below.
I think this is colossally dumb because it eliminates PRI and SEC isolation. I ...
user224284
0
votes
4
answers
474
views
Is it possible to replace the electrolytic capacitor in a full wave rectifier bridge with a ceramic capacitor?
Why do we use electrolytic capacitors in full wave rectifier bridges? Is it because we can have huge capacitance with electrolytic type or is it because the output is DC voltage where polarity is a ...
- 19
4
votes
6
answers
1k
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Is full wave rectified AC, without a smoothing capacitor, okay for switching a DC solenoid and a DC relay?
I have a circuit where the 24V AC secondary voltage of a transformer is full wave rectified to DC.
The only parts that this circuit is connected are some 24VDC solenoids and a 24VDC relay. The ...
- 567
0
votes
0
answers
648
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How to mathematically choose values for a pi filter without knowing the cutoff frequency?
I am trying to design an AC to DC converter. After the rectifier, I have a pi filter. I need to calculate my L and C values, but I don't know what the cutoff frequency is/how to find it! Any help is ...
- 15
0
votes
1
answer
106
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AC to DC signal to drive a MOSFET
I need to intercept a 220V AC line to drive a 3.3v MOSFET that activates (for example) an LED.
Looking around, a solution could be to use an AC/DC converter but they are meant for powering (so mostly ...
0
votes
2
answers
608
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How to smooth fluctuating DC from transformer?
For an audio amplifier, I designed an AC to DC (220v to 12V 2A) power circuit like this:
simulate this circuit – Schematic created using CircuitLab
When I powered my amplifier with the circuit ...
1
vote
1
answer
329
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Transforming bike dynamo output to reduce diode bridge loss ratio
I'd like to use a standard 6v/3w bike bottle dynamo to power a 18650 battery charging module TP4056 which also powers some LED's.
Diode bridge rectifier steals 1.4v from the generator. In addition to ...
- 35
0
votes
2
answers
453
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Rectifier design calculation
I am working on a rectifier design. For that I am analyzing the formula for capacitor selection. I came across a video reference.
Io: average output current
Vo: Average output voltage
Vc: capacitor ...
- 307
6
votes
4
answers
2k
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Converting 8V AC to 8V DC - bridge rectifier gets very hot while idling
I am tinkering with an Arduino and recently had to convert 8V AC to 5V DC in order to run it.
The project is a custom doorbell, which gets the power from the doorbell transformer (transformer is ...
- 171
1
vote
1
answer
1k
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Powering a motor through wireless electricity [closed]
simulate this circuit – Schematic created using CircuitLab
simulate this circuit
Schematic redrawn by Transistor. OP to edit or delete as required.
I have a wireless electricity transmission ...
- 113
11
votes
3
answers
15k
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Bridge rectifier: 4 diodes vs. single chip?
I notice (among the DIY audio enthusiasts at least) that when it comes time to design a power supply for an amplifier, DAC or whatever that the parts list will inevitably include something like "4 x ...
- 664
1
vote
5
answers
3k
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capacitor power supply for 1 Amp output current
I'm trying to make a fairly small AC(220V) to DC convertor to power microcontrollers and some actuators. It needs to output a current of 1 amp to the load. I tried looking at using transformers, but ...
4
votes
3
answers
168
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Given the diagram, where do I add/replace a larger capacitor for continued power while bike is stopped?
Following the circuit diagram, included as an image in this guide, where do I replace/add a larger capacitor for continued power while the bike is stopped?
My guess is that it should replace the ...
- 143
0
votes
1
answer
846
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240V AC to ~380V DC converter at 3500 continuous watts
I have a single phase 5KW generator connected to a diesel engine capable of producing approx 3500 Watts of power
I need to convert the 240V AC to DC in order to send it to my solar charge controller ...
- 15
6
votes
3
answers
2k
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Why AC supply is rectified first before stepping voltage down?
I have opened one of my phone chargers and was trying to understand how it works.. I found IC MB6F just at AC input which came out to be a bridge rectifier.
My question is why AC is first rectified ...
