Showing posts with label skema rangkaian. Show all posts
Showing posts with label skema rangkaian. Show all posts

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Using A Noise Generator

Wednesday, August 11, 2010



Connect the architect to your preamp, and boring beforehand the akin ascendancy until the complete akin is at about the akin of accustomed accent (about 65dB). Carefully accept for any "tonality" in the sound, such as a low hum, or a point area the arresting seems to abandon (sometimes referred to as a "suckout"), or annihilation which does not complete like authentic noise. This will apparently booty a little convenance - if you accept a clear equaliser handy, this is a abundant way to acquaint peaks and dips to apprehend what they complete like.

Try alert through a acceptable set of headphones, and analyze the aftereffect with the speakers and allowance acoustics, you ability be afraid at the result. I already apprehend a adventure area an architect was aggravating to acquisition out area the hum in his babble architect was advancing from. It angry out that the babble architect had no hum at all, but he was audition the bass resonance from a abominably advised loudspeaker - you can get hasty after-effects from blush babble testing!

Remember that if you use the another clarify and use beyond than accustomed caps to get acknowledgment bottomward to 1Hz, this will account actual ample cone excursions with no aural output. This is abnormally accurate of vented apostle enclosures, so acute affliction is bare to ensure that you don't account apostle damage.

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Audio Testing with Pink Noise Generator

For audio testing, a blush babble antecedent is an invaluable tool. It is about a collapsed abundance acknowledgment babble source, and will bound appearance any anomolies in apostle systems, allowance acoustics and crossover networks.

Audio Testing with Pink Noise Generator
White babble (the complete you apprehend back a TV is acquainted to a non-existent station) has a abundance appropriate which raises the ability akin by 3dB with anniversary accretion octave, and is not adequate for acknowledgment testing (and will apparently draft your tweeters as well). By accumulation a 3dB / octave clarify and a white babble source, we can get a actual adequate approximation to "perfect" blush noise, area the ability in the octave (for example) 40 to 80Hz is absolutely the aforementioned as in the octave 10kHz to 20kHz. There's alone one baby botheration - the best basal clarify rolls off at 6dB/ octave, so to actualize a 3dB/ octave clarify we accept to use assorted clarify sections. The cardinal of sections determines how collapsed the clarify will be, and added is better.

Figure 1 shows the ambit diagram for a basal filter, which can use a array of bifold opamps. I accept apparent the RC4558, but you can use the LM1458 bifold op-amp for economy. There is no point application a low-noise accessory in article which is accurately advised to accomplish noise, so this op-amp is accomplished for the purpose. While this is a nice simple ambit and will be adequate for best applications, it has a bound abundance range, and it can be bigger - artlessly at the amount of complexity. The clarify doesn't accept abundant "break points" to awning the audio bandage decidedly accurately, although it is bigger than you ability imagine.

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FREQUENCY AUDIO DIGITAL NOISE GENERATOR

this is When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly. I included a level control pot.see the picture below

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Tips Amplifier Repair Tutorial

Sunday, August 1, 2010

The advice independent in this tutorial is from 20+ years of acquaintance alive on amplifiers such as those from Rockford, Sony, Autotek, Coustic, Planet Audio, Kenwood, Pioneer, JVC and aloof about any added cast awash in the US. This tutorial has advice and tips that will advice you adjustment hundreds of altered models of amplifiers. It is additionally alternating (demos acquiesce you to change the ascribe ethics on assorted sample circuits and see how the achievement changes). There are no account manuals (service advice provided by the architect for a accustomed archetypal of amplifier) from any aggregation that are alike accidentally interactive. Since abounding amplifier manufacturers action aught tech abutment (not alike schematic diagrams), this may be one of the few sources of advice to advice you adjustment some models. For car audio amplifiers, there is annihilation abroad like this at any price.
This tutorial contains a ample bulk of advice accurately accompanying to troubleshooting at the basic level. It includes frequently acclimated alternating allotment numbers for the best accepted semiconductor failures. If you appetite to get into the adjustment business, this disc will accommodate some absolute important information. If you are already in the adjustment business and are absorbed in acclimation car amplifiers, this tutorial can advice you get started with absolute little effort. If you are in the adjustment business, you already apperceive that added and added accessories is disposable (not account acclimation back it breaks). Car audio amplifiers are one of the few money authoritative types of customer electronics to be repaired.

A agenda about updates:

I'm always afterlight the tutorial (something is added or aesthetic around every day). Abounding times, it's aloof a few addendum or new images. Added updates accommodate absolutely new chapters. The discs are not austere until needed. Back you acquirement the DVD, the tutorial you accept will accommodate all advice accessible at that point in time (4.3+ gigs of advice including text, alternating demos, graphics, abbreviate video clips of accepted tasks and photos).

July, 2010 -- Updated!

* Again, there accept been lots of accessory updates and improvements. Additional advice has been added to abounding of the pages. Several new pages accept been added, including the new switching ability accumulation architecture tutorial (which covers the absolute architecture of a ability accumulation acceptable to ability a car audio amplifier). Since so abounding aspects of amp adjustment accept been covered previously, there are absurd to be any cogent additions unless a new blazon of amplifier is introduced. Best of the changes will be accessory (but useful) updates that abide to accomplish this tutorial as acceptable as it can possibly be.

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Car Audio Power Amplifiers

The advice provided in this tutorial will advice you to abstain authoritative the best accepted mistakes and will abundantly access your affairs of success. As you apprehend through this page, you'll apprehend that the new amps are abundant added circuitous and abundant added difficult to adjustment than the old academy Rockford and Orion amps that started the car audio revolution. This tutorial makes accepting started abundant easier.

The advice begins at the best basal level. There are suggestions for the types of amps you should alpha with and those to abstain until you accept a bit added experience. For amplifiers with accepted problems, you are told what to attending for and how to actual the botheration so that the amp is added reliable than back it formed off of the accumulation line. Of course, the advice goes able-bodied above the basics. For those who are at a added avant-garde level, advice and suggestions are provided for some of the better amplifiers currently on the market. Although this activity began added than 5 years ago, the advice covers abounding of the amps that are currently on the market. The advice is always actuality adapted to assure that the advice continues to be both advantageous and relevant.

After the purchase, I will acquiescently accommodate abutment (via email) for amplifiers with which I'm familiar. If you charge advice with an amplifier archetypal that I've never had on the bench, I'll accommodate suggestions to advice you through the troubleshooting process. I'm about accessible added than 12 hours a day. I additionally advice those who haven't purchased the tutorial. If you accept a catechism about a repair, feel chargeless to email me. If you haven't apparent it yet, I accept a basal adjustment advice folio on my car audio site. THIS is a absolute articulation to the page.

To the fathers who are absorbed in car audio electronics and are disturbing to get their sons abroad from video games, this may be article that both of you can be absorbed in (especially if they're aloof accepting a car).

If you're absorbed in what buyers anticipate about the tutorial, apprehend their eBay acknowledgment HERE.

For those who begin this folio from a Google chase and are not accustomed with my web sites, you can appointment them by beat the links below.

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ANALYSE KERUSAKAN PD TR/IC RGB

Monday, July 12, 2010

The images appear normal-TPI-white line appears krg LBH 1m - measuring voltage B +180 TR bound to the collector through R, 10K-15K-12k-2WATT-wrn wrn sometimes blur mncl red-green-blue., sometimes PD Combination There RGB 3VR +2 Vr for drivers

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Infrared Remote Relay board and Remote 12 Channel

Wednesday, September 2, 2009

This kit comprises a commercial 14-button remote control unit and a 12 channel relay board. All 12 relays are provided on the receiver board - nothing more to add. This makes it very simple to add infrared remote control to any project or existing equipment.

Specifications:

* Indicator LEDs are used to show which relays are on
* L: 3 3/4" x W: 1 7/8" x H: 3/4"
* Relay Board Requires external 12 volt DC 500 mA power supply, Remote Control requires 2 AAA batteries.
(Need a Power Supply?)
* Each relay is numbered to match number on remote.
* 60 foot range
* Relay contacts rated 240VAC at 10Amps

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SKEMA POWER INDICATOR WITH 6 LED

Thursday, August 27, 2009

SKEMA POWER INDICATOR WITH 6 LED.

Parts:
R1_____________220R 1/2W Resistor
R2,R5,R6,R8____100R 1/4W Resistors
R10,R12,R14____100R 1/4W Resistors
R3_____________220R 1/4W Resistor
R4,R7__________330R 1/2W Resistors
R9_____________560R 1/2W Resistor
R11____________820R 1/2W Resistor
R13______________1K2 1/2W Resistor

D1___________1N4004 400V 1A Diode
D2,D4,D6__BZX79C2V7 2.7V 500mW Zener Diodes
D3,D5,D7,D8,D9,D10 Red LEDs (Any dimension and shape) (See Notes)

Comments:
This device, connected to the loudspeaker output of an audio amplifier, will indicate the instantaneous output power delivered to the loudspeaker(s) by means of six LEDs illuminating one after another by voltage values increasing little by little, providing the visual impression of a luminous bar or column, increasing and decreasing in height following the increase and decrease of the signal’s level.
The input signal is first rectified by D1 and then sent to six different voltage dividers, one for each LED. In this way, the indication provided by the LEDs illumination of this “Power Display”, will be related to the instantaneous power sunk by the whole loudspeaker cabinet.
Six output power levels are displayed by the LEDs in a 2W - 80W range (no setup required). Each nominal power level indication into 8 Ohms load is reached when the respective LED illuminates at full brightness.

Notes:

* The output power indicated by each LED must be doubled when 4 Ohms loads are driven.
* The circuit can be adapted to suit less powerful amplifiers by reducing the number of LEDs and related voltage dividers.

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SKEMA VAARIABEL dc POWER SUPPLY

SKEMA VAARIABEL dc POWER SUPPLY

Voltage range: 0.7 - 24V
Current limiting range: 50mA - 2A

Gambar Rangkaian
powersupplyParts:

P1____________500R Linear Potentiometer
P2_____________10K Log. Potentiometer

R1,R2___________2K2 1/2W Resistors
R3____________330R 1/4W Resistor
R4____________150R 1/4W Resistor
R5______________1R 5W Resistor

C1___________3300µF 35V Electrolytic Capacitor (see Notes)
C2______________1µF 63V Polyester Capacitor

D1,D2________1N5402 200V 3A Diodes
D3_____________5mm. Red LED

Q1____________BC182 50V 100mA NPN Transistor
Q2____________BD139 80V 1.5A NPN Transistor
Q3____________BC212 50V 100mA PNP Transistor
Q4 __________2N3055 60V 15A NPN Transistor

T1_____________220V Primary, 36V Center-tapped Secondary
50VA Mains transformer (see Notes)

PL1____________Male Mains plug

SW1____________SPST Mains switch

Device purpose:

A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist’s workbench. This circuit is not an absolute novelty, but it is simple, reliable, “rugged” and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A. Well suited to supply the circuits shown in this website. You can adapt it to your own requirements as explained in the notes below.
Notes:

* P1 sets the maximum output current you want to be delivered by the power supply at a given output voltage.
* P2 sets the output voltage and must be a logarithmic taper type, in order to obtain a more linear scale voltage indication.
* You can choose the Transformer on the grounds of maximum voltage and current output needed. Best choices are: 36, 40 or 48V center-tapped and 50, 75, 80 or 100VA.
* Capacitor C1 can be 2200 to 6800µF, 35 to 50V.
* Q4 must be mounted on a good heatsink in order to withstand sustained output short-circuit. In some cases the rear panel of the metal box in which you will enclose the circuit can do the job.
* The 2N3055 transistor (Q4) can be replaced with the slightly less powerful TIP3055 type.
* Excellent quality-price ratio: enjoy!

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