Defining & Running Circuit Simulation Analyses | Online Documentation for Altium Products
Stay up to date with the latest technology and industry trends with our complete . Before we can run a simulation, the schematic must contain components with SIM .. node, the current in each supply and the current and power in each device. is then replaced with a fixed amplitude sine wave generator and the circuit is. PartSim is a free and easy to use circuit simulator that includes a full SPICE simulation engine, web-based schematic capture tool, a graphical waveform viewer. NSPICE; a Forth language extension to simulate electronic circuits. Date: Jan 17, of the circuit simulation field: off-line switched-mode power supply design for However, with fixed timesteps it is necessary to synchronize switch.
Soldering the components to the board is the only way to build your circuit and from the way you do it depends greatly your success or failure. This work is not very difficult and if you stick to a few rules you should have no problems.
The soldering iron that you use must be light and its power should not exceed the 25 Watts. The tip should be fine and must be kept clean at all times. For this purpose come very handy specially made sponges that are kept wet and from time to time you can wipe the hot tip on them to remove all the residues that tend to accumulate on it. DO NOT file or sandpaper a dirty or worn out tip. If the tip cannot be cleaned, replace it.
There are many different types of solder in the market and you should choose a good quality one that contains the necessary flux in its core, to assure a perfect joint every time.
DO NOT use soldering flux apart from that which is already included in your solder. Too much flux can cause many problems and is one of the main causes of circuit malfunction. If nevertheless you have to use extra flux, as it is the case when you have to tin copper wires, clean it very thoroughly after you finish your work.
In order to solder a component correctly you should do the following: Clean the component leads with a small piece of emery paper.
Bend them at the correct distance from the components body and insert he component in its place on the board. You may find sometimes a component with heavier gauge leads than usual, that are too thick to enter in the holes of the p.
0-30 Vdc Stabilized Power Supply with Current Control 0.002-3 A
In this case use a mini drill to enlarge the holes slightly. Do not make the holes too large as this is going to make soldering difficult afterwards. Take the hot iron and place its tip on the component lead while holding the end of the solder wire at the point where the lead emerges from the board.
The iron tip must touch the lead slightly above the p. When the solder starts to melt and flow wait till it covers evenly the area around the hole and the flux boils and gets out from underneath the solder.
The whole operation should not take more than 5 seconds. Remove the iron and allow the solder to cool naturally without blowing on it or moving the component. If everything was done properly the surface of the joint must have a bright metallic finish and its edges should be smoothly ended on the component lead and the board track.
If the solder looks dull, cracked, or has the shape of a blob then you have made a dry joint and you should remove the solder with a pump, or a solder wick and redo it. Take care not to overheat the tracks as it is very easy to lift them from the board and break them. When you are soldering a sensitive component it is good practice to hold the lead from the component side of the board with a pair of long-nose pliers to divert any heat that could possibly damage the component.
Make sure that you do not use more solder than it is necessary as you are running the risk of short-circuiting adjacent tracks on the board, especially if they are very close together.
When you finish your work, cut off the excess of the component leads and clean the board thoroughly with a suitable solvent to remove all flux residues that may still remain on it.
Regulated Power Supply-Block Diagram,Circuit Diagram,Working
Construction … continued As it is recommended start working by identifying the components and separating them in groups. Place first of all the sockets for the ICs and the pins for the external connections and solder them in their places. Continue with the resistors. Remember to mound R7 at a certain distance from the printed circuit board as it tends to become quite hot, especially when the circuit is supplying heavy currents, and this could possibly damage the board.
It is also advisable to mount R1 at a certain distance from the surface of the PCB as well. Continue with the capacitors observing the polarity of the electrolytic and finally solder in place the diodes and the transistors taking care not to overheat them and being at the same time very careful to align them correctly. Mount the power transistor on the heatsink. To do this follow the diagram and remember to use the mica insulator between the transistor body and the heatsink and the special fibber washers to insulate the screws from the heatsink.
Remember to place the soldering tag on one of the screws from the side of the transistor body, this is going to be used as the collector lead of the transistor. The ground terminal is always node 0 in any circuit. The next line contains the simulation command, followed by some options, the final line is an.
More about spice netlists can be found in the Spice Primer article. This is shown on the screenshot below. If you move your mouse pointer over a component the current and power dissipated in that component will also be displayed.
For example, hovering over R1 will show the current is 1mA and power dissipation in R2 is 15mW. Spice error Log After each simulation, or if something went wrong a spice error log is created. Operating Point Data Labels Each connection in a circuit is given a node number.
Sometimes it is useful to display the numeric dc value of a node. To label a node, after the simulation has run, double click the desired wire segment as shown below, the operating point voltage of the node will be displayed: Voltage and Current Labeling By default the voltage of a node will be displayed.
However you can display current through the node or use a numeric expression. Right click over the current label and you will see a screen like below: However, the expression may be edited to any equation, including currents, powers or even the voltage of a specific node. Once placed, these data labels may be moved or copied to other nodes in the circuit. Click on OK and current through R1 will be displayed. You can even double click the vertical wire segment, which will show voltage of the node.
The screenshot below shows the modified circuit, now displaying both voltage and current at node 2. Values between Nodes and Decimal Values So far, the examples have been easy and all answers were integers. Now consider the circuit below: When run you will have a table of results, click the close button and the results will be displayed on the schematic, see below: As before clicking on wire segments allow you to enter an expression. Now look at the junction called VR2.
Right click to edit the expression. A dialogue box similar to below will be displayed: To display the voltage across resistor R2, it is simply the difference between the node voltages. Hovering the mouse cursor near a wire the node will be displayed on the bottom left of the main LTspice window. As the topmost terminal is displayed as n, and the lower connection is Vout then entering the expression: V n - V vout as shown above will compute the voltage across R2.How to Make Power Supply Circuit in Proteus
An alternative method is to use comma separated node values as shown above. This is just V, for voltage then the node numbers separated by a comma and encased in parenthesis.
Whichever method it is helpful to create a text marker, press "t" and enter "VR2" to remind you what is being displayed. Decimal Places LTspice has many math functions and the "round" function may be used to truncate the number of digits displayed. The output from an ordinary power supply is fed to the voltage regulating device that provides the final output. The output voltage remains constant irrespective of variations in the ac input voltage or variations in output or load current.
Figure given below shows the complete circuit of a regulated power supply with a transistor series regulator as a regulating device.
Each part of the circuit is explained in detail. Transformer A step down transformer is used to step down the voltage from the input AC to the required voltage of the electronic device.
This output voltage of the transformer is customized by changing the turns ratio of the transformer according the electronic device specs. The input of the transformer being Volts AC mains, the output is provided to a full bridge rectifier circuit. The rectified DC output is given as input to the filter circuit.
Filter Circuits In Short The ac voltage, typically Vrms is connected to a transformer which transforms that ac voltage to the level for the desired dc output. The resulting dc voltage usually has some ripple or ac voltage variation. A regulating circuit use this dc input to provide a dc voltage that not only has much less ripple voltage but also remains constant even if the input dc voltage varies somewhat or the load connected to the output dc voltage changes.
The regulated dc supply is available across a voltage divider. Regulated Power Supply — Diagram Often more than one dc voltage is required for the operation of electronic circuits.
power supply in proteus | Electronics Forum (Circuits, Projects and Microcontrollers)
A single power supply can provide as many as voltages as are required by using a voltage or potential divider, as illustrated in the figure. As illustrated in the figure, a potential divider is a single tapped resistor connected across the output terminals of the supply. The tapped resistor may consist of two or three resistors connected in series across the supply.
In fact, a bleeder resistor may also be employed as a potential divider. Power Supply Characteristics There are various factors that determine the quality of the power supply like the load voltage, load current, voltage regulation, source regulation, output impedance, ripple rejection, and so on. Some of the characteristics are briefly explained below: