Dc power source circuit judges,telephone directory maine,quilling book free download - You Shoud Know

I use the lm10 IC because it has a reference voltage and that’s useful for dc power supply. This lose voltage regulate output voltage rate of output current is compare between reference voltage of P3 and lose voltage on R11.T3 is protecting short circuit with R11. If this equipment is so important, it becomes imperative for all in the field to learn all the nitty-gritties of this important member of the electronic family.
Let's begin and learn how to design a power supply circuit, a simplest one first , probably for the noobs who would find this information extremely useful.
A power supply circuit will fundamentally require three main components for providing the intended results. The transformer is the device which has two sets of windings, one primary and the other one is the secondary. The low stepped down voltage available at the secondary of the transformer is used for the intended application in electronic circuits, however before this secondary voltage can be used, it needs to be first rectified, meaning the voltage needs to be made into a DC first. For example if the transfornmer secondary is rated at 12 volts then the acquired 12 volts from the transformer secondary will be a 12 volt AC acros the relevant wires. Electronic circuit can never work with ACs and therefore this voltage should be transformed into a DC. A diode is one device which effectively converts an AC to DC, there are three configurations through which basic power supply designs may be configured. Using a single diode: The most basic and crude form of power supply design is the one which uses a single diode and a capacitor.

The above compensation act done by the capacitors stored energy helps to maintain a clean and ripple free DC output which wouldn't be possible just by the diodes alone.
For a single diode power supply design, the transformer's secondary winding just needs to have a single winding with two ends. However the above configuration cannot be considered an efficient power supply design due to its crude half wave rectification and limited output conditioning capabilities. Using two diodes: Using a couple of diodes for making a power supply requires a transformer having a center tapped secondary winding. Though, the two diodes work in tandem and tackle both the halves of the AC signal and produce a full wave rectification, the employed method is not efficient, because at any instant only one half winding of the transformer is utilized.
Using four diodes: It's the best and universally accepted form of power supply configuration as far as the rectification process is concerned. The clever use of four diodes makes things very simple, only a single secondary winding is all that is required, the core saturation is perfectly optimized resulting in an efficient AC to DC conversion. This type of diode configuration is popularly know as the bridge network, you may want to know how to construct a bridge rectifier, kindly refer to this article.
All the above power supply designs provide outputs with ordinary regulation and therefore cannot be considered perfect, these fail to provide ideal DC outputs, and therefore are not desirable for many sophisticated electronic circuits. For obtaining fixed voltage levels, 78XX series ICs may be employed with the above explained power supply circuits.
Pin 1 is the reference voltage and reference voltage is losing some voltage on R1 that has 100uA .

This is because no electronics can run without power, to be precise a low voltage DC power, and a power supply unit is a device which is specifically meant for fulfilling this purpose. Mains 220v or 120v is fed to the primary winding which is transferred to the secondary winding to produce a lower induced voltage there.
The figure shows how a full wave rectified power supply is made using four diodes and a relatively low value filter capacitor. The IC LM 338 works exactly like the LM 317 but is capable of handling up to 5 amps of current. Though very cheap and easy to build, these types of power supply circuits cannot support heavy current and are normally limited to 200 mA or so. This circuit is protected from short circuit.P2 is for controlling the current at the range of 0-2A. Stabilize the output voltage with R4 on negative pin on op-amp and with R2 & P1 on positive pin.

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