Questions tagged [bridge-rectifier]

An arrangement of four or more diodes in a bridge circuit configuration which provides the same output polarity for either input polarity. It is used for converting an alternating current (AC) input into a direct current (DC) output.

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Full wave bridge rectifier oscilloscope reading

I am trying to read the output wave of a full bridge rectifier circuit on my oscilloscope, but the waveform looks really funky. I've set it up as shown in the spice simulation where resistor R1 ...
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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 ...
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Why Does DC Load Draw Twice As Much AC Current Through Transformer?

I have designed the following circuit, comprised of 4 loads, 1 of 4.2ohms and 3 of 21ohms, drawing a total of 2.4Arms (1.5A, 300mA, 300mA and 300mA respectively) of AC current through the secondary of ...
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Bridge Rectifier Fails When AC Inputs are Shorted

I am working on a design that involves powering a 3.3V microcontroller off a doorbell transformer but I am running into an issue with the bridge rectifier failing when the AC inputs to the rectifier ...
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Diode Bridge in Simulator not behaving as expected

Hi I have a Diode Bridge as outlined in the image below. As you can see I am getting a negative voltage on one pair of diodes instead of this voltage being flipped to positive. Can you see anything ...
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Storing the charge from a MOSFET Bridge Rectifier

I am using the following MOSFET Bridge to harvest AC bursts, that come from an electromagnetic transducer. In front of this circuit is a supercapacitor I have added. I read the following on a ...
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How much DC voltage is needed to brake a 3 triphasic motor?

What would the nominal parameters of the bridge rectifier and the transformer be?
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How to to Use a Nylon Shoulder Washer?

I'm somewhat curious as to how to use a nylon shoulder washer with a bolt. There is an example of this here (https://electronics.stackexchange.com/a/45579/95654), but I can't figure out how it would ...
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Measuring an AC-voltage at the ouput of a full bridge rectifier

I've a full bridge rectifier and I put the following function into it: $$5\sin(100\pi t)\tag1$$ So, at the output I get: $$\left|(5-2V_d)\sin(100\pi t)\right|\tag2$$ Where \$V_d\$ is the voltage ...
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Importance of series resistor at output of Rectifier

For conversion of AC into pulsating DC we used Rectifiers circuits. But I read somewhere (from a well-known site) that the circuit does not work in ideal condition if I used my first circuit. The ...
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Examine rectified voltage before and after

I built a simple bridge rectifier. simulate this circuit – Schematic created using CircuitLab I connected the output of the function generator with CH1 of my oscilloscope and with the input ...
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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 ...
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Bridge rectifier: What is the purpose of these two elements?

I found the following circuit in a random video (don't know what it's worth) and have two questions about it. I get that it's a full wave rectifier, and I think I have a decent idea on how it works. ...
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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 ...
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Why am I getting a half-wave rectified output when i am using a full-wave rectifier?

I have recently gotten back into electronics and have access to a lab with a signal generator and oscilloscope. I have been trying to teach myself how to use this equipment by building small and ...
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Designing MOSFET bridge rectifiers for high voltages

I've been looking into MOSFET bridge rectifiers, also known as "zero IQ" rectifiers, as a replacement for traditional diode-based bridge rectifiers. Here's a simple example: The benefit, of course, ...
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Problem with capacitor after bridge rectifier

I wanted to make a simple power supply so I made a bridge rectifier with 4 diodes rated 6 amps, then I connected the bridge to a transformer (220 volts to 9 volts (measured 9.4 with voltmeter) 50 Hz) ...
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How to avoid voltage drop when using full bridge rectifier as reverse polarity protection

I found a couple of old bridge rectifiers. After reading some docs and tutorials about reverse polarity protection decided to give them a try. The problem is nobody offered a solution against the ...
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What is the rectifier's role in this AC dimmer circuit?

Here is a typical AC dimmer circuit: http://www.eleccircuit.com/wp-content/uploads/2010/09/light-ac-dimmer-120watt.jpg I just came across another variant which uses a rectifier: http://www....
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Bridge Rectifier's Output Became Near-Zero Value After The Implementation of a Voltage Divider

Weird. I have both simulated (shown in picture) and practical circuit built. Simulation works as expected. On the practical circuit, the output of the full-wave bridge rectifier gives the result ...
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Motor control diagram voltage divider

The motor control for a small winch I have has the following diagram: Note: (4, blue) and (5, gray) are connected together. I do not understand what the voltage divider connected to the (4) connector ...
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Full bridge rectifier and resonance for wireless power transfer in the receiver circuit

I was wondering which is the most suitable method to set up the receiver circuit for wireless power transfer circuit. Currently I have a circuit with the tesonance tank, i.e., the receiver coil and ...
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Help me understand XOR gate with diode logic [closed]

I'm generally a pretty smart person, but for some reason I can't get my head wrapped around this one. A little background - I have performed this function before using two diodes and two SPDT ...
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AC Current Sensing Switch Using Current Transformer

I'm struggling to design a circuit that will interpret signals from a SCT013 current transformer and trigger a constant 5v signal (which will go to a microcontroller) when a certain current threshold ...
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Commutation overlap angle

Let's assume we have three-phase diode (not SCR, ignore those in the picture) rectifier like in the picture: Assuming we have no source inductance and other ideal conditions, diodes from 1 to 6 are ...
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Full Wave Bridge Rectifier vs.centre tap rectifier

Why does the DC output in bridge rectifier higher than centre tap rectifier.
user41375's user avatar
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1 answer
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A problem regarding connecting the grounds within two seperate circuits

Figure 1 I am trying to design the above circuit for my project to create zero crossing detector as shown in the above figure. This configuration was proposed originally by the member named "...
Amy's user avatar
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3 answers
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How to create a zero crossing detector using a full bridge wave rectified circuit

Currently 1) I have a full bridge wave rectified ac waveform of 10Vmax. 2) I also have a potentiometer adjustable DC waveform. 3) My rail voltages are +12V and -12V. 4) I currently supply my full ...
Amy's user avatar
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2 answers
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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 ...
Subha Jeet Sikdar's user avatar
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Bridge rectifier peak voltage at load

Assuming the peak voltage at \$V_1\$, \$V_{1p}=9.25V\$ and ideal silicon diodes (\$0.7V\$ drop in forward bias) and the DC output in \$V_0\$ is \$5V\$. I want to find the \$V_{op}\$, peak voltage at \$...
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AC to DC rails sag excessively when loaded

I'm just experimenting with rectifying a 120v to 12v dual winding transformer and smoothing it out two a dual rail power supply while I work towards attempting to build a clean power supply. I ...
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790 views

Current Sensing Switch

I have built the circuit depicted below in order to start a 10A 220V dust collector(Load 2) when I run my 20A 220V table saw (Load 1). So far, I have not been able to activate the relay to power load ...
Steve's user avatar
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-1 votes
2 answers
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Getting several voltages from a single transformer

I have a multi-tap transformer and I need to get two different voltage from the transformer, variable and steady. Is the below diagram correct, will it work this way? simulate this circuit – ...
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How the voltage stable mechanism work in Bridge rectifier?

We all know that the purpose of Bridge rectifier is to change the AC to DC,and the picture below is my assumption,and as i know ,the Q1, Q2, D2 and the first level RC circuit are the filter and ...
Shine Sun's user avatar
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