In Circuit Transistor Checker

This simple circuit has helped me out on many occasions. It is able to check transistors, in the circuit, down to 40 ohms across the collector-base or base-emitter junctions. It can also check the output power transistors on amplifier circuits. Circuit operation is as follows. The 555 timer ( IC1 ) is set up as a 12hz multi vibrator. The output on pin 3 drives the 4027 flip-flop ( IC2). This...

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Simple Low Drop 5V Regulator

A 4-cell pack is a convenient, popular battery size. Alkaline manganese batteries are sold in retail stores in packs of four, which usually provide sufficient energy to keep battery replacement frequency at a reasonable level. Generating 5 V from four batteries is, however, a bit tricky. A fresh set of four batteries has a terminal voltage of 6.4 V, but at the end of their life, this voltage...

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Digital Bike Tachometer SP

This digital SP tachometer for bikes uses 2 reed switches to urge the speed data of the bicycle. The reed switches are put in close to the rim of the wheel where permanent magnets pass by. The permanent magnets are connected to the wheelspokes and activate the reed switches everytime they pass by it. The speed is digitally displayed.The tachometer circuit works in step with this principle; the pulses...

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Step Up Converter For 20 LEDs

The circuit described here is a step-up converter to drive 20 LEDs, designed to be used as a home-made ceiling night light for a child’s bedroom. This kind of night light generally consists of a chain of Christmas tree lights with 20 bulbs each consuming 1 W, for a total power of 20 W. Here, in the interests of saving power and extending operating life, we update the idea with this simple circuit...

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Flashing LED Battery status Indicator

Signals when an on-circuit battery is exhausted 5V to 12V working voltageA Battery-status Indicator circuit will also be useful, mainly to observe portable Test-gear units and equivalent devices. LED D1 flashes to apparel the customers attention, signaling that the circuit is operating, so it's going to no longer be left on by using mistake. The circuit generates about two LED flashes per second,...

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LED DETECTS lightweight

All LEDs offer off lightweight of a specific color however some LEDs also are able to detect lightweight. clearly theyre not nearly as good as a tool that has been specially created to detect light; like solar cell, photocell, photo resistor, lightweight dependent resistor, photo transistor, photo diode and different photo sensitive devices. A inexperienced LED can detect lightweight and a high-bright...

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The Gentle Touch Circuit Diagram

Consumer home equipment in this day and age hardly have a proper mains switch. Instead, appliances are fliped on and off on the contact of a button on the faraway control, similar to any other perform. This circuit displays how a tool (as lengthy because it does not draw too excessive a present) can be swaped on and off the utilization of a pushbutton. The means requires that a microcontroller...

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Power Supply for Power Amplifier 200Watt By STK4050

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.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...

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Plug Socket Wiring Detailst568astandard

Plug And Socket Wiring Details T568astandard.Wiring Diagram For Rj 45 Cat5e Cable I T On The Go Inc Computer.Rj45 Wiring.Tech Info Lan Wiring And Pinouts.Santomieri Systems Cat 5 Rj45 Wire Diagrams.Wiring Diagram.How To Make A Rj45 Cable Tester.Welcome To Tutor Piggy Blogspot Com Rj45 Wiring Diagram.The Exact Sequence Represented In The Wiring Diagram Labeled 568b.Peak Electronic Design...

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Preamplifier for RF Sweep Generator

The RF sweep frequency generator (‘wobbu-lator’) published in the October 2008 difficulty of Elektor has a receiver option that enables the instrument for use as an instantaneous conversion receiver. This receiver does alternatively have a noise floor of best –80 dBm, which in reality will need to have been –-107 dBm to obtain a sensitivity of 1 µV. So, for a just proper receiver sommore...

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Low Cost Universal Battery Charger Schematic

Low cost solution for charging of each NiCd and NiMh batteriesHere is the circuit diagram of a low price universal costr for NiCD - NiMH batteries. This circuit is Ideal for automobile use. It has capability to transform a primes adapter in to a costr . This one can be used to cost mobile phone, toys, moveables, video batteries, MP3 gamers, ... and has selectable cost present. An LED is situated...

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Simple Light Sensor Alarm circuit with NE555

Occurring this circuit despatched out an alarm when its LDR sensor is exposed to gentle by way of solar or lamp. A 555 steady multivariate used to be used here which sent sign a tone of about 1kHz upon detecting mild.The sensor when uncovered by mild fulls the circuit and makes the 555 oscillate at about 1kHz with transistor to pressure current.The sensor can be shown within the circuit diagram....

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14W CLASS A AMPLIFIER CIRCUIT USING 2N3055 SCHEMATIC DIAGRAM

14W CLASS A AMPLIFIER CIRCUIT USING 2N3055 SCHEMATIC DIAGRAMMany early amplifiers operated in Class A, but as output powers rose above 10W the problems of heat dissipation and power supply design caused most manufacturers to turn to the simpler, more efficient Class B arrangements and to put up with the resulting drop in perceived output quality. Why Class A ? Because , when biased to class A, the...

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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 provide a response of ±3.0 dB from about 120 Hz to better than 20,000 Hz.Actually, the frequency response is ruler flat from about 170 Hz to well over 20,000...

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Easy Discrete Low Drop Regulator

This circuit was designed to ensure that an amplifier circuit containing a TDA1516Q would not exceed its maximum supply voltage when the load is small. This amplifier is used in a PC to increase the audio power somewhat. The PC power supply, however, created so much interference that an additional power supply was required.Discrete Low-Drop Regulator Circuit DiagramThe power supply has its own power...

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Hubbell Wiring Device Kellems 74093561 Conduit Grip

Amazon Com Hubbell Wiring Device Kellems 074 09 3516 Conduit Grip 1 1.Hubbell Wiring Device Kellems 20509001 1 2 Metal Clad Sealing O Ring.Hubbell Wiring Device Kellems Hbl7595n Inlet Flanged Midget Be The.Hubbell Wiring Device Kellems 033 03 013 Grip Pulling Amazon Com.Amazon Com Hubbell Wiring Device Kellems Shc1015 Cord Connector 187.Hubbell Wiring Device Kellems 74093561 Conduit Grip...

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How to Make a 200 Watt Transformerless Inverter Circuit

    A 12 V car battery can be used as the 12V source.     Use the POT R1 to set the output frequency to50Hz.     For the transformer get a 9-0-9 V , 10A step down transformer.But here the 9-0-9 V winding will be the primary and 220V winding will be the secondary.     If you could not get a 10A rated transformer , don’t worry a 5A one will...

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Smart Trailing Socket

Mains sockets swaped routinely via a Control Socket, Up to 1000W changeed powerThis circuit consists of a Trailing Socket (also called Extension or Distribution Socket) or identical software where two, three or more sockets (depending on the box dimensions and on constructors needs) will most probably be powered only when a current floats within the Control Socket. For example: if an electrical...

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6 to 15V DC to DC Converter

A very efficient 6V to 15V DC to DC converter using LM2585 is shown here. LM2585 is a monolithic integrated voltage converter IC that can be used in various applications like flyback converters, boost converters, forward converters, multiple output converters etc. The circuit requires minimum number of external components and the IC can source up to 3A output current.Circuit diagram : 6 to 15V...

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3 VOLT 6 VOLT MINI AUDIO AMPLIFIER SCHEMATIC DIAGRAM

3 VOLT - 6 VOLT MINI AUDIO AMPLIFIER SCHEMATIC DIAGRAMThe potentiometer circuit can be used to control volume. Capacitor C1 and C2 are designed to filter supplyvoltage If the battery separator is used as operations offer source.For using batteries C1 and C2 are not required.IC TDA7052 is a mono output amplifier in 8-comng Head DI package (DIP). The device is designed primarily for battery-operated...

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Automatic TV Lighting Switch

The author is the happy owner of a television set with built-in Ambilight lighting in the living room. Unfortunately, the television set in  the bedroom lacks this feature. To make up for this, the author attached a small lamp to the wall to provide background lighting, This makes  watching television a good deal more enjoyable, but it ’s  not the ideal solution. Although...

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Pump it up Mp3 Booster

MP3 players are all the rage these days. The smaller ones in memory-stick format are particularly easy to take with you; your very own ‘personal sound system’ on the move! It’s when you want others to share your taste in music that you find these players to have a lack of power. You can get round this problem with the help of the MP3 booster, a small amplifier that can be used to connect...

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How to Make a Simplest Compact 1 Watt LED Driver Circuit at 220V 110V Mains Voltage

Circuit diagram. Seetharaman’s words about the circuit: I am sending you a table lamp made from defunct energy saver lamp with broken tubes. CFL converted into LED lamp. Most of the components will be available in ones scrap box. Few components available in the CFL PCB also can be used. Procedure 1. Carefully remove the broken glasses 2. Open the assembly carefully 3. Remove electronics and...

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Lambda Probe Readout For Carburettor Tuning

A lambda probe (or oxygen sensor) can be found on the exhaust system of most cars running on unleaded fuel. Having reached its normal operating temperature (of about 600 degrees Celsius!) the lambda probe supplies an output voltage proportional to the amount of residual oxygen measured in the exhaust gas.This information is indicative of, among others, the air/fuel ratio supplied by the...

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12KV High Voltage Generator

The hobby circuit below uses an unusual method to generate about 12,000 volts with about 5uA of current. Two SCRs form two pulse generator circuits. The two SCRs discharge a 0.047uF a 400v capacitor through a xenon lamp trigger coil at 120 times a second. The high voltage pulses produced at the secondary of the trigger coil are rectified using two 6KV damper diodes. The voltage doubler...

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150W BRIBGE AMPLIFIER WITH TDA 7294 CIRCUIT DIAGRAM

150W BRIBGE AMPLIFIER WITH TDA 7294 CIRCUIT DIAGRAMAs you can see, there are provisions to use TDA7294 well. This circuit is almost identical, but a specification higher. There are links on the board to connect contacts 1 and 5 (it should not be connected to the TDA727). Use TDA7294, fees can run bridged (BTL or bridge tied load) to about 150 W at 8 ohms. I think P87B be used to provide phase signal...

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14 W AUDIO AMPLIFIER TDA2030 CIRCUIT SCHEMATIC DIAGRAM

14 W AUDIO AMPLIFIER TDA2030 CIRCUIT SCHEMATIC DIAGRAMResistors should be at least 1/4W types with 1% tolerance recommended. I used 0.6W 1% metal film resistors and they work well. Capacitors I used were electrolytic cans for C2, C5 and C6. At the time of building, I did not have enough 100uF caps so I used 220uF caps instead, this will not cause trouble, unless you use caps that are smaller than...

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