Switched Ethernet Modern Ethernet Implementations

Cat7 Cables 100 Ohm Utp Unshielded Twisted Pair Ethernet Wiring.R Seau Ethernet Lan C Bl En Fils De Cuivre Cat5.Category 5 Wiring Scheme Straight Through Cable Vs Crossover Cable.Cat 5 Ethernet Cable Standards Pin Out Assignments.Switched...

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Bench Amplifier Based on LM386

A small 325mW amplifier with a voltage gain of 200 that can be used as a bench amplifier, signal tracer or used to amplify the output from personal radios, etc. Circuit DiagramNotes:The circuit is based on the National Semiconductor LM386...

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IC 555 Design Note

The popular Timer IC 555 is extensively used in short duration timing applications. IC 555 is a highly stable integrated circuit functioning as an accurate time delay generator and free running multivibrator. But one of the serious...

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Simple 3 Way Active Crossover Circuit Diagram

This is the Simple 3-Way Active Crossover Circuit Diagram with linear phase response. The problems that exist at common crossover circuit is known. The low pass filter causes a delay in the signal. Unlike the high-pass filter causes a head...

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Simple LED Driver Design

The Simple LED Driver Design TCA62735AFLG is a charge pump type DC DC Converter specially designed for constant current driving of white LED. IC can outputs LED current 120mA or more to 2.8-4.2V input. IC observes the power-supply voltage...

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Converting a DCM Motor

We recently bought a train set made by a renowned company and just couldn’t resist looking inside the locomotive. Although it did have an electronic decoder, the DCM motor was already available 35 (!) years ago. It is most likely...

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LED Christmas Star

This circuit can be used to construct an attractive Christmas Star. When we switch on this circuit, the brightness of lamp L1 gradually increases. When it reaches the maximum brightness level, the brightness starts decreasing gradually....

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Dimming Controlled LED LM3409

This dimming controlled LED driver circuit is designed using LM3409 P-channel MosFET controller for step-down (buck) current regulators.The LM3409 devices use Constant Off-Time (COFT) control to regulate an accurate constant current without...

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Subwoofer Filter and Low Pass Filter with LM741

The acoustics of converting a filter, there are many aspects of the economic viability of the more famous are baxandal filter low and high frequency filters and crossover Acoustic space is transformed into sub-domains, so that the Thursday...

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Numeric Water Level Indicator

Most water-level indicators for water tanks are based upon the number of LEDs that glow to indicate the corresponding level of water in the container. Here we present a digital version of the water-level indicator.    It uses...

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High Power Car Battary Eliminator

To operate car audio (or video) system from household 230V AC mains supply, you need a DC adaptor. DC adaptors available in the market are generally costly and supply an unregulated DC. To overcome these problems, an economical and reliable...

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All Constructing Various DC Power Supplies Projects

One of the basic building blocks of electronics project is building your own DC power supplies from an AC source of 110 V.A.C or 220 V.A.C.The common DC voltages that are necessary to power up the devices are usually in the range of three...

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Low Voltage Remote Mains Switch

This circuit allows a 240V mains appliance to be controlled remotely via low-voltage cabling and a pushbutton switch. The mains appliance (in this case, a light bulb) is switched with a suitably-rated relay. All of the electronics is...

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Switching Power Supply Using the LMZ14202H

Using the LMZ14202H power switching controller, can be designed a very simple switching power supply circuit that can provide a fixed output voltage covering a wide range of voltages .Switching Power Supply Circuit diagramThis power switching...

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Quick Draw

The object of Quick Draw is to test your reaction time against your opponents. A third person acts as a referee and begins the duel by pressing S1, which lights LED1. Upon seeing LED1 go on, you try to outdraw your opponent by moving S2 from...

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Remote Control Receiver

Hello! in this post I will show a remote control receiver, I tested this circuit with an approximate distance of 4 meters and it worked perfectly, the spread of this circuit is that it can be triggered by remote control of multiple devices,...

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Build LED Light Pen Schematic

Physicians and repair engineers often use small light pens for visual examination purposes. Rugged and expensive as these pens may be, their weak point is the bulb, which is a ‘serviceable’ part. In practice, that nearly always equates to...

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Control Switch for Fan and Air Conditioner

An electronic switch that can be used to switch on both the air-conditioner as well as fan of your room, one by one. The circuit consists of power supply and control sections. The power supply section is built around transformer X1, bridge...

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CMOS Toggle Flip Flop Using Laser Pointer

The circuit below is similar to the one above but can be used with a laser pointer to toggle the relay rather than a push button. The IR photo transistor Q1 (Radio Shack 276-145A) or similar is connected to the set input (pin 6). The photo...

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UV Torch Light

UV (ultra-violet) LEDs can produce eye-catching effects when their light is allowed to interfere with certain colours, particularly with reflected light under near-dark conditions. Also try shining some UV light on a diamond.Circuit...

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Octopus Curve Tracer

This project involves the construction of a low-cost curve tracer that is suitable for testing a wide variety of electronic components both in-circuit and out of circuit. It is easy to construct and extremely useful for finding defective parts,...

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Best Start up Aid for PCs

Since one of the servers owned by the author would not start up by itself after a power failure this little circuit was designed to perform that task.  The older PC that concerned did have a standby state, but no matching BIOS set-ting...

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SW RF Pre Amplifier

A radio frequency amplifier to boost SW reception. Frequency range approximately 5 to 20 MHz.SW RF Pre-Amplifier Circuit DiagramNotes:The problem with amplifying weak radio signals is that you also amplify the noise. What you can receive depends...

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Track Your Distance Through a Bicycle Odometer

Just like cars that measures the distance it can travel, you can also do it with your bicycles. We usually keep track of our mileage to see how far our strength can go but would it be of great use if we track it because we are maintaining...

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Ultra Low Power LCD Indicator

This circuit serves as an ultra-low power replacement for multiple LED on-off indicators. It also has the advantage of being easy to read in full daylight. With the parts shown, it is possible to display four bits of information.The display...

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230 V AC To 400 V DC Power Supply Circuit Diagram

Description               A lot of students are who dont know how to convert 230 volt AC to 400 DC. So today I am published   230 V AC to 400 V DC circuit diagram on my blog. Working...

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Simple Automatic Street Light

Needs no manual operation for switching ON and OFF. When there is need of light. It detects itself weather there is need for light or not. When darkness rises to a certain value then automatically street light is switched ON and when there...

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12V 4 AA Cell Differential Temperature Charger

This project includes a number of improvements over my older Temperature Controlled NICD Charger circuit. This circuit runs on 12VDC, allowing it to be used in a car or from a 12V solar power system. Additionally, a current sensor LED verifies...

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Li Ion Polymer Battery Charger Using LTC4098

Using the LTC4098 USB Power-Path controller you can design an high efficiency , full-featured Li-Ion Polymer battery charger using few external electronic components . This Li-Ion Polymer battery charger circuit can be used with many power...

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Audio Booster Circuit

Small and portable unit, Can be built on a veroboardThe amplifiers gain is nominally 20 dB. Its frequency response is determined primarily by the value of just a few components-primarily C1 and R1. The values of the schematic diagram...

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IR Remote Control Extender Mark 3

This Mark3 version of the Infra Red extender is a special version designed to control appliances that use high frequency modulated IR remote controls.Notes:IR appliances use pulses (control signals) sent over a modulated IR carrier wave. The...

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