thanks
Ryan
A.C/D.C power
A.C/D.C power
Does anyone know how to turn A.C power into D.C power?<p>
thanks
Ryan
thanks
Ryan
Re: A.C/D.C power
Well, I believe most of us here do.<p>Here is a brief summary.<p>The main parts of a DC supply are:<p>1. Step Down Transformer
2. Rectifier
3. Filter
4. IC Regulator
5. Load<p>1. Step Down Transformer <p>The incoming ac voltage must be stepped-down (decreased) by a transformer. The voltage is stepped to the voltage required by the dc output.<p>2. Rectification <p>The ac voltage then needs to be rectified. This is done either with a full wave rectifier OR a center tapped-bridge rectifier. The purpose of the rectification is to eliminate the AC componant, or the negative half cycle of the AC wave. <p>The rectification is accomplished with diodes. With the configuration of the diodes, the negative cycle of the AC wave forem is inverted.<p>3. Filtering <p>The filtering stage is performed with an electrolytic capacitor to eliminate the ripple voltage. <p>You might notice that when the AC wave is rectified, there are "gaps" in the waveform. The capacitor charges on the leading edge of the waveform and then discharges into the gaps of the waveform. This provides "smoothing" a provides a DC like waveform.<p>4. IC regulator <p>The IC voltage regulator takes in the unregulated, rectified, filtered AC signal and produces a "pure" DC signal at the output.<p>The regulator is a three termianal device and a common part number is the 7805 which is a 5v regulator.<p> 5. Load <p>The load resistance and impedance is important to determine current requirement and voltage requirement.<p>Hope this sheds some light on the question.<p>GReg
2. Rectifier
3. Filter
4. IC Regulator
5. Load<p>1. Step Down Transformer <p>The incoming ac voltage must be stepped-down (decreased) by a transformer. The voltage is stepped to the voltage required by the dc output.<p>2. Rectification <p>The ac voltage then needs to be rectified. This is done either with a full wave rectifier OR a center tapped-bridge rectifier. The purpose of the rectification is to eliminate the AC componant, or the negative half cycle of the AC wave. <p>The rectification is accomplished with diodes. With the configuration of the diodes, the negative cycle of the AC wave forem is inverted.<p>3. Filtering <p>The filtering stage is performed with an electrolytic capacitor to eliminate the ripple voltage. <p>You might notice that when the AC wave is rectified, there are "gaps" in the waveform. The capacitor charges on the leading edge of the waveform and then discharges into the gaps of the waveform. This provides "smoothing" a provides a DC like waveform.<p>4. IC regulator <p>The IC voltage regulator takes in the unregulated, rectified, filtered AC signal and produces a "pure" DC signal at the output.<p>The regulator is a three termianal device and a common part number is the 7805 which is a 5v regulator.<p> 5. Load <p>The load resistance and impedance is important to determine current requirement and voltage requirement.<p>Hope this sheds some light on the question.<p>GReg
Re: A.C/D.C power
thanks for the info again Greg so if I get a plug-in transformer that puts the voltage down to 12 volts A.C I could get rid of some of these steps right?
Re: A.C/D.C power
Nope you still need to rectify the signal and filter it.<p>I just drew up two schmatics for you. Take a look here:<p>Power Supply Schematic<p>greg
Re: A.C/D.C power
Check out the following links:<p>Rectification<p>Intro<p>Diodes.....<p>That should help you out. You should check into some online tutorials on DC and AC signals as well as semiconductor theory.<p>Greg
Re: A.C/D.C power
No trouble...<p>g
Who is online
Users browsing this forum: Google [Bot] and 138 guests