Schematic | Circuit guide | Manual Wiring diagram | Electronic

RC5 Repeater

Posted by Unknown Monday, September 30, 2013 0 comments
The designer of this circuit had fitted two (waterproof) loudspeakers in his bathroom and connected them to the stereo system in the living room via a long cable. Naturally, this promptly led to the desire to be able to use the remote control unit from the bathroom. Commercially available extension sets for this purpose were judged to be unsatisfactory, primarily because they require an additional IR transmitter diode to be fitted in front of the amplifier. Although the repeater shown here requires...

5 3W Amplifier With Surround System

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The AN7147 Dual 5.3-watt Audio Power Amplifier from Panasonic is listed as a ‘replacement type’ so hopefully will be around for some time to come. Together with some extra components, it can represent a simple surround-sound system requiring no opamps or a negative voltage supply. As shown by the circuit diagram the basic stereo amplifier is changed into a surround-sound system by a trick called ‘adding feedback from the opposite channel’. When surround sound is required, the negative feedback signals...

Halogen Lamp Dimmer With Soft Start

Posted by Unknown Sunday, September 29, 2013 0 comments
Most dimmers use pulse width modulation (PWM) to control the amount of power that is delivered to the lamp. Those that come bundled with a switch faceplate control the firing angle of a Triac on the 240V mains side. These work fine with resistive loads but may not be suitable for inductive loads such as low-voltage halogen lamp transformers. This circuit also employs PWM but it switches at a high frequency (22kHz) on the low-voltage side of the lamp transformer. This high frequency also simplifies...

A Bedside Lamp Timer Circuit Diagram

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30 minutes operation, Blinking LED signals 6 last minutes before turn-off The purpose of this circuit is to power a lamp or other appliance for a given time (30 minutes in this case), and then to turn it off. It is useful when reading at bed by night, turning off the bedside lamp automatically in case the reader falls asleep... After turn-on by P1 pushbutton, the LED illuminates for around 25 minutes, but then it starts to blink for two minutes, stops blinking for two minutes and blinks for another...

Active High Pass Filter Using LM741

Posted by Unknown Saturday, September 28, 2013 0 comments
Circuit Diagram:  Active High Pass Filter Circuit Diagram This is active high pass filter circuit for 327Hz frequency using LM741. It will use to build Harmonic at 3 of 130.81 frequency have the value at least. More than the frequency Fundamental 30 dB, for output be sawtooth wave form for use in sound of music way system Electronic design will use the circuit filters three rank frequency. By have 3 dB you slopes can use Op-amp IC number LM741 or number LF351it will meet the frequency well....

PHONE BROADCASTER ELECTRONIC CIRCUIT DIAGRAM

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PHONE BROADCASTER ELECTRONIC CIRCUIT DIAGRAMThe automatic switching consists of resistors R1-R3, variable resistor VR1 as the regulator, transistor T1 and T2, zener diode D2, and diode D1. R1 and VR1 is useful as an input voltage divider from the telephone line.Parts list :    Resistor R1-R2, R4 : 47k ohm    Resistor R3 : 100 ohm    Resistor R5 : 22k ohm    Resistor R6 : 1M ohm    VR1 : 100k ohm    Diode D1...

Electric Window Fence Charger

Posted by Unknown Friday, September 27, 2013 0 comments
Here is the circuit of a simple electric window charger. With a couple of minor circuit variations, it can be used as an electric fence charger too. A standard 12V, 7Ah sealed maintenance-free (SMF) UPS battery is required for powering the entire unit. Any component layout and mounting plan can be used. However, try to keep the output terminals of transformer X1 away from the circuit board. Timer NE555 (IC1) is wired as a free-running oscillator with narrow negative pulse at the output pin 3. The...

A Simple NiCd Charger Circuit Diagram

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A simple NiCd charger can be built using ‘junk box’ components and an inexpensive LM317 or 78xx voltage regulator. Using a current limiter composed of R3 and a transistor, it can charge as many cells as desired until a ‘fully charged’ voltage determined by the voltage regulator is reached, and it indicates whether it is charging or has reached the fully charged state. If the storage capacitor (C1) is omitted, pulsed charging takes place. In this mode, a higher charging current can be used, with...

Flip Flop Using CMOS NAND Gates

Posted by Unknown Thursday, September 26, 2013 0 comments
Using just two NAND or inverter gates its possible to build a D type (or ‘toggle’) flip-flop with a push-button input. At power-up the output of gate N2 is at a logical ‘1’, ensuring that transistor T2 is switched off. When the push-button is pressed the output of N2 changes to a logical ‘0’ and transistor T2 conducts. The coupling between N1 and N2 ensures that the output of N1 will always be the inverse of N2 so T1 and T2 will always be in opposite states and will flip each time the push-button...

Switchless NiCd NiMH Battery Charger

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This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown here will eventually pay off because you no longer have to throw away your NiCds after three months or so of maltreatment in the original charger. The circuit diagram shows an LM317 in constant-current configuration but without the usual fixed or variable resistor at the ADJ pin to determine the amount of output current. Also, there is no switch with an array...

Exit Sign With Battery Protection

Posted by Unknown Wednesday, September 25, 2013 0 comments
This circuit substitutes two white Luxeon 1W Star LEDs for the inverter and fluorescent tube in a standard battery-backed illuminated exit sign, as used in commercial premises. While the Luxeons have less light output than a standard small fluorescent tube, their directional light is quite adequate for the purpose and they do result in less current drain from the battery. However, the use of a 6V SLA battery for this application means that it can be completely discharged if the 240VAC mains supply...

On Off Touch Switch Circuit Digram

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Small and portable unit, Suitable for normal-type devicesThe modern mechanic switches are improved concerning of old technology. We need however many times to replacement some old switch or to check currents bigger than the durability of certain switches or simple we need something with modern appearance. For he and different reasons is essential the up circuit. It is simple in the manufacture and the materials that use they exist everywhere.Circuit diagram:Touch Activated On Off SwitchParts:R1...

Fuse Box BMW 328i 1999 Engine Compartment Diagram

Posted by Unknown Tuesday, September 24, 2013 0 comments
Fuse Box BMW 328i 1999 Engine Compartment Diagram - Here are new post for Fuse Box BMW 328i 1999 Engine Compartment Diagram.Fuse Box BMW 328i 1999 Engine Compartment Diagram Fuse Panel Layout Diagram Parts: inside mirror electrochromic, interior light, light module, make up mirror light, navigation, on board computer, outside mirror, parking aid, passenger compartment, radio, rain sensor, rear wiper, roler sun blind, secondary air pump, side airbag, socket, speed control, starter interlock, telephone,...

11W Stereo 22W Mono Power Amp Using TDA1519C

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Integrated AF power amps have seen great improvements in recent years offering improved power and easier use. The TDA1519C from Philips contains two power amplifiers providing 11 W per channel stereo or 22 W mono when the two channels are connected in a bridge configuration. The special in-line SIL9P package outline allows the chip to be conveniently bolted to a suitable heatsink. The TDA1519CSP is the SMD version, in this case the heat sink is mounted over, and in contact with, the top surface of...

78xx Voltage Regulators

Posted by Unknown Monday, September 23, 2013 0 comments
The voltage regulators from the 78xx-series are found in many analogue power supplies. It seems, then, somewhat superfluous to say much more about them. But on the other hand, it can be very useful to highlight the important points, just because they are so ubiquitous. The 78xx is almost always used ‘bare’, because additional components are almost unnecessary. In fact, only one additional component is required, and that is capacitor C2. Based on the manufacturer’s recommendation, this capacitor should...

Preamplifier For Soundcard

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This circuit can be used for inductive pick-up elements and dynamic microphones Most soundcards have a ‘line’ input and one for an electret (condenser) microphone. To be able to connect an inductive tape-recorder head or a dynamic microphone, an add-on preamplifier is needed. Even in this day and age of integrated microelectronics, a transistorised circuit built from discrete part has a right of existence. The preamplifier described in this short article goes to show that it will be some time before...

Dual Power Supply For Amplifiers

Posted by Unknown Sunday, September 22, 2013 0 comments
A power supply suitable for use with the 60W amplifier presented in the predeeding project is perfectly simple, and no great skill is required to build (or design) one. There are a few things one should be careful with, such as the routing of high current leads, but these are easily accomplished. The first thing to choose is a suitable transformer. I suggest toroidal transformers rather than the traditional "EI" laminated types because they radiate less magnetic flux and are flatter, allowing...

Mains Indicator

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It is not always immediately obvious whether a power-consuming appliance is switched on or not. Examples are the lamp in the attic or the shed, or electric heating in an awkward place. A nice solution would be to connect an LED directly in series with the appliance, unfortunately you’d better duck for cover if you tried… The obvious solution would be to place a (power-) resistor in series with the load and connect an LED with series resistor across it.However, this solution has significant disadvantages,...

1966 ford thunderbird Wiring Diagram

Posted by Unknown Saturday, September 21, 2013 0 comments
1966 ford thunderbird Wiring Diagram(click for full size image)The Part of 1966 ford thunderbird Wiring Diagram: fuse block, stop light switch, backup light switch, neutral safety switch, blower motor, temp gauge, oil switch, breaker, alternat...

Fuse Box BMW Z4 2005 Coupe Diagram

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Fuse Box BMW Z4 2005 Coupe Diagram - Here are new post for Fuse Box BMW Z4 2005 Coupe Diagram.Fuse Box BMW Z4 2005 Coupe Diagram Fuse Panel Layout Diagram Parts:air bag, ASC/DSC, CD charger, central locking system, low beam headlight, lighting circuit, high beam headlight, brake light, interior and luggage, cigar lighter, side light, turn indicat...

Fuse Box BMW 02 Touring 1971 Diagram

Posted by Unknown Friday, September 20, 2013 0 comments
Fuse Box BMW 02 Touring 1971 Diagram - Here are new post for Fuse Box BMW 02 Touring 1971 Diagram.Fuse Box BMW 02 Touring 1971 Diagram Fuse Panel Layout Diagram Parts: parking, side light, license plate light, instrument lighting, fog warning light, fog lamp relay, low beam headlight, indicator flasher, cigar lighter, clock, insterior light, hazard warning flasher, trailing turn indicator, heater blower, fuel pump, automatic choke, fuel gauge, coolant thermometer, oil pressure telltale, stop light,...

1996 Chevrolet Camaro Z28 Wiring Diagram

Posted by Unknown Thursday, September 19, 2013 0 comments
1996 Chevrolet Camaro Z28 Wiring DiagramThe Part of 1996 Chevrolet Camaro Z28 Wiring Diagram: instrument cluster, tachometer, black wire, yellow wire, red wire, crankshaft, power distribution,camshaft position sensor, tachometer output, sensor ground, sensor ignition positive voltage, tachometer output, reference sigal, knock sensor, srankshaft position sensor, underhood electrical center, sensor ignition positive voltage, bypass control, powertrain control modu...

Smart Lighting in the Enterprise

Posted by Unknown Thursday, September 12, 2013 0 comments
Daylight harvesting is becoming increasingly important in the design and implementation of commercial lighting systems. Being able to integrate the natural light from windows with flexible, controllable sources of lighting helps improve the work environment and cut energy bills.Being able to have closer control of the lighting systems in a commercial environment is a key element to this strategy and energy harvesting can play an important role. Being able to have flexible placement of control...

Build a Cell Phone Jammer Schematic Diagram

Posted by Unknown Wednesday, September 11, 2013 0 comments
  This cell phone jammer operates at GSM800 frequency since most mobile phones use it to operate. So the selected VCO is a sweeping oscillator, which is very effective but may be hard to construct for the beginners without nice RF-testing equipment.As a noise source you can use 45MHz clock oscillator which is driving Local Oscillator port located on a mini-circuit mixer. There is also an impedance matching network for Local Oscillator signal to pass through it. It is used to equate impedances...

Over voltage Protection Circuit Diagram

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When testing a circuit, a source of voltage that is variable and has over voltage shutdown is veiy useful. In this circuit, Rl is adjusted to 1 to 2 V below the eventual shutdown threshold. R2 sets the trip voltage. When this voltage is reached, the circuit shuts the voltage to the circuit under test down. To reset, reduce Rl below trip threshold and depress reset switch SI.Over voltage Protection Circuit Diag...

Compressor Bleed Air Valve Actuation

Posted by Unknown Tuesday, September 10, 2013 0 comments
Compressor Bleed Air Valve Actuation createSummaryAndThumb("summary8042992592978244741...

1 W Home Stereo Amplifier Circuits Diagram

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This is a one watt home stereo amplifier module project using the KA2209 IC from Samsung, which is equivalent to the TDA2822. It operates from 3-12V DC & will work from a battery since the dormant current drain is low. It requires no heat sink for normal use. The input & output are both ground referenced. Maximum output will be obtained with a 12V power supply & 8 ohm speaker, however it is suitable for driving headphones from a supply as low as 3V.The Specifications of the home stereo...

Arduino Leonardo vs Uno

Posted by Unknown Monday, September 9, 2013 0 comments
The Arduino team is now shipping their latest creation – the Leonardo. It is the first Arduino to use Atmelʼs ATmegaXU4 series chip with built-in USB. This change is big and it has big benefits. In addition to the built-in USB, it offers more digital and analog pins. This comprehensive guide gives you the details you need to know to start using it – pinout differences, hardware capabilities, new software libraries and more....

13 Color LED Rainbow Schematic

Posted by Unknown Thursday, September 5, 2013 0 comments
Only a few years ago, the choice of LEDs was limited to IR, red, yellow, and green. The LED manufacturers have been busy extending the spectrum, and filling in the gaps. The latest generation of organic LEDs (OLEDs) has added some dazzling new colors to the spectrum. This circuit uses a set of 13 differently colored LEDs to generate a full color spectrum. The photo does not fully represent the colors generated due to camera limitations. The real-world display is very eye-catching. If you want...

Car Battery Charger Circuit

Posted by Unknown Wednesday, September 4, 2013 0 comments
DescriptionThis charger will quickly and easily charge most any lead acid battery. The charger delivers full current until the current drawn by the battery falls to 150 mA. At this time, a lower voltage is applied to finish off and keep from over charging. When the battery is fully charged, the circuit switches off and lights a LED, telling you that the cycle has finished.Circuit DiagramPartsR1 500 Ohm 1/4 W ResistorR2 3K 1/4 W ResistorR3 1K 1/4 W ResistorR4 15 Ohm 1/4 W ResistorR5 230 Ohm 1/4 W...

MC2833 FM Transmitter

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A very simple FM transmitter circuit can be designed using MC2833 integrated circuit, designed for cordless telephone and FM communication equipment. It includes a microphone amplifier, voltage controlled oscillator and two auxiliary transistors.This MC2833 FM transmitter circuit has an low drain current ( ICC =2.9mA typically ) and supports a wide range operating voltage ,from 2.8 to 9 volts .MC2833 FM Transmitter Crystal X1 connected at pin 16 and pin 1 ( trough a 5.1uH coil ) is fundamental mode,...

PIC Digital Clock Timer

Posted by Unknown Tuesday, September 3, 2013 0 comments
his clock timer uses a PIC16F628 microcontroller to display 3 and 1/2 digit time and control an external load. The clock includes a calendar with leap year and optional daylight savings adjustments. The timer output can be set from 1 to 59 minutes and manually switched on and off. The clock also has a correction feature that allows an additional second to be added every so many hours to compensate for a slightly slow running oscillator.  The oscillator uses a common 32.768 KHz watch crystal...

100 W Bipolar Power Amplifier

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This is a basic 100 watt power amplifier designed to be (relatively) easy to build at a reasonable price. It has a better performance (read: musical quality) than the standard STK module amps that are used in almost every mass market stereo receiver manufactured today.100 W Bipolar Power Amplifier Circuit DiagramWhen I originally built this thing, it was because I needed a 100 WPC amp and do not want any money. So I designed around parts I had in the store. The design is actually a standard format,...

Lithium Polymer Peak Charger Circuit Diagram

Posted by Unknown Monday, September 2, 2013 0 comments
DescriptionThis circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-cad battery packs of the same voltage and amp-hour rating. Their only drawback is that they require a rigid charge and discharge regime to achieve maximum life. The most important points of note are as follows:Circuit Diagram:They should be charged using a constant-current, constant-voltage method, which stops the charge once the...