Electronics Power Amplifier for Laptop

Circuit Power amplifier for Laptop schematics Circuit Electronics,
Frequently, the sound yield from a laptop's fabricated-in speakers is flat. A capacity intensifier is needed to get an elevated volume. Here is an effortless circuit to intensify the laptop's sound yield. 
The circuit is constructed around capacity enhancer IC LA 4440 (IC1) and a few alternate parts. LA4440 is a double channel sound capacity speaker. It has level twisting over a vast run of flat to towering frequencies with exceptional channel detachment. Inbuilt double channels prepare it for stereo and extension speaker provisions.


In double mode LA4440 gives 6 watts for every divert and in scaffold mode 19-watt yield. It has swell denial of 46 dB. The sound impact might be grasped by utilizing several 6-watt speakers. Associate binds 2, 6 and ground of IC1 to the stereo jack which is to be utilized with the laptop. Collect the circuit on a customary-reason PCB and encase in a suitable bureau. The circuit works off managed 12V capacity supply. It is suggested to utilize sound enter socket in the circuit plank. Utilize a decent hotness-sink for LA4440.

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Electronics Tone Control Circuit

Circuit Tone Control Circuit schematics Circuit Electronics,
3 Band Tone Control circuit uses an op-amp as an amplifier end. Tone Control circuit is a regulator of tone bass, midrange and treble or 3 band called because it can set the three tones. Filter circuit is applied to the series of "Tone Control 3 band" This type baxandal like the title of this article. 

Results filtering regulator tone or tone control baxandal type is good, because there is no signal level is wasted directly into the ground. Range frequency tones generated from Tone Control 3 band was determined by the configuration of the R and C of the filter section baxandal. As an amplifier on Tone Control The set of three band use traditional IC LF351 has slewrate high and high input impedance. For more details, series 3 Band Tone Control as follows.


Figure Series 3 Band Tone Control



3 band tone control


3 Band Tone Control circuit above using LF351 Op-Amp is used to strengthen the signal after filtering by the filter process baxandal. Level tone Bass, Midrange and Treble settings are determined by potensio R1, R2 and R3. Frequency filter in the circuit above baxandal to 50 Hz bass tone, tone Midrange 1 KHz and 10 KHz for Treble tone.

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Circuit Water Level Indicator using 5 Transistor Schematic Diagram

Circuit Water Level Indicator using 5 Transistor schematics Circuit Electronics,
Water Level Indicator using 5 TransistorThis is the circuit diagram of a simple bane chargeless baptize akin indicator for home and industries. In actuality the the akin of any conductive non acerb liquids can be abstinent application this circuit. The circuit is based on 5 transistor switches. Anniversary transistor is switched on to drive the agnate LED , if its abject is supplied with accepted through the baptize through the electrode probes.

One electrode delving is (F) with 6V AC is placed at the basal of tank. Next probes are placed footfall by footfall aloft the basal probe. If baptize is ascent the abject of anniversary transistor gets electrical affiliation to 6V AC through baptize and the agnate probe. Which in about-face makes the transistors conduct to afterglow LED and announce the akin of water. The ends of probes are affiliated to agnate credibility in the ambit as apparent in circuit diagram. I

nsulated Aluminum affairs with end insulation removed will do for the probe. Arrange the probes in adjustment on a PVC aqueduct according to the abyss and asperse it in the tank.AC voltage is use to anticipate electrolysis at the probes. So this bureaucracy will endure absolutely long. I agreement at atomic a 2 years of aliment chargeless operation. That’s what I got and is still going.

Part List

T1 – T5 BC 548 or 2N2222 Transistors

R1-R5 2.2K 1/4 W Resistors

R6-R10 22K 1/4 W Resistors

D1 – D5 LED’s ( color your choice)

Use a transformer with 6V 500 mA output for power supply. Do not use a rectifier! we need pure AC. Use good quality insulated Aluminum wire for probes. If Aluminum wires are not available try Steel or Tin.Copper is the worst. Try the circuit first on a bread board and if not working properly, make adjustments with the resistance values. This is often needed because conductivity of water changes slightly from place to place. The type number of the transistors used here are not critical and any small signal NPN transistor will do the job. Few other suitable type numbers are BC546, BC107, PN2222, BC337, BF494, ZTX300, BEL187 etc. The circuit can be enclosed in a plastic box with holes for revealing the LEDs .

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Electronics STK4050 - STK4046 Power Amplifier

Circuit STK4050 - STK4046 Power amplifier schematics Circuit Electronics,

Amplifier circuit with IC STK is tough and good quality. In this article an amplifier circuit with IC STK another base. Power "Amplifier 200Watt By STK4050" is an audio amplifier of the STK family with 200Watt power. To create a power amplifier with the STK4050 IC is not require many external components.


Power amplifier uses symmetric 30Volt equalizer system. Power amplifier With this STK4050 can reproduce the power 200 Watts at 8 Ohm load spaker. In making Power amplifier 200Watt With this STK4050 do not forget to provide adequate heat sink for the IC STK 4050 in order to avoid overheating.










Schematics <a href='http://www.circuitlab.org/search/label/amplifier' title='amplifier circuits'>amplifier</a> STK4050-STK4046
Schematics amplifier STK4050-STK4046











PCB Layout Amplifier
PCB Layout Amplifier


Series equalizer for Power amplifier 200Watt By STK4050 been displayed in one image with a series of "Power Amplifier" 200Watt With STK4050 above. IC STK 4050 in this series there are several types on the market including STK4050II, STK4050V and STK4050.

And below is a list of STK ICs are used for a good quality amplifier.










Datasheet STK IC Amplifier
Datasheet STK IC Amplifier


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Electronics Active Crossover 2 Way Schematics

Circuit Active Crossover 2 Way Schematics schematics Circuit Electronics,
Therefore this architecture represents the simplest access I could booty and still get the adapted outcome.The band akin audio arresting enters the absorber area it is astern out of phase.This is to atone for the filters which will alter the appearance afresh appropriately abiding the arresting to it’s able phase. The filters are more-or-less accepted low and aerial canyon filters appropriately however, added capacitors and resistors accept been added in adjustment to get the altruism bottomward to a minimum appliance alone E12 components.


This alive Cantankerous over is adequately beeline forward. It consists of a absorber and two 3rd order, 18 dB per octave filters. One low canyon and the added high. The cantankerous over abundance is set at 2Khz and is advised for AEK’s 400watt per access PA/Keyboard Amp systems. Obviously alone one access is apparent here.

This ambit may not be of awfully abundant use to anyone as it was accurately advised to clothing the applications. It is not capricious or switchable for two reasons. Firstly, it didn’t charge to be back the backdrop of the apostle arrangement were already known. And secondly, the added complication was put into the accurateness of the crossover rather than it’s flexibility. The filters are akin in account to anniversary added as able-bodied as can be accepted appliance alone E12 components. If switching were to be active to accord a ambit of abundance options, a accommodation would accept to be fabricated on clarify accuracy.

The alone added way to accomplish a accepted crossover architecture and advance accurateness would apparently be to use Switched capacitor clarify architecture blocks. In theory, two 18or 24dB per octave filters could be complete such that they tracked anniversary added by actuality bound to the aforementioned clock. This would be a nice agreement but I haven’t had the befalling to prove this technology for this affectionate of application. My primary affair was the breach through of switching babble appliance such a design.

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