Sunday, April 20, 2025

Thursday, November 20, 2014

Circuit of fire alarm detection

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The rooms are vulnerable to fire as a storage material, flammable, requires a system to prevent the occurrence of a fire. For example, using a fire alarm detection, so for example occur if a flame that can quickly and others that...
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Wednesday, November 19, 2014

USB Audio Interface based DAC PCM2902

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This is the circuit quality preamplifier with built-in USB DAC for my Leachamp power amplifier. Scheme is PCM2902 datasheet. Circuit includes DAC and ADC, SPDIF input and output of HID and with 3 buttons + MUTE, VOL-and VOL. For...
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Power Supply Failure Alarm

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Most of the circuit power supply failure alarm circuits require additional or external power supply. However, this circuit requires no additional power supply. The circuit uses a voltage of 5 volts to 15 volts. To adjust the voltage...
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Tuesday, November 18, 2014

20W Surround audio amplifier with SI 1020G

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Have you been use the IC above? if those who have not, IC above is used or applied to the audio power amplifier. IC processing is quite good for use on amplifier home, or room. IC used is SI1020G who have not very high output with...
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Monday, November 17, 2014

Hot Water Level Indicator

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Notes:Save fuel bills and the economy of the planet with this circuit. SW1 is a normally open press button switch which allows you to view the level of hot water in a hot water tank. When pressed the voltage difference at the junction...
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Sunday, November 16, 2014

Automatic Water Pump Controller

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Automatic water pump controller is a series of functions to control the water pump otamatis in a reservoir or water storage. As the water level sensor made with a metal plate mounted on the reservoir or water tank, with a sensor in...
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Saturday, November 15, 2014

Parts Needed for Motion Detector Circuit

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This is a circuit which can detect any motion or movement. Its most common use is to detect a person moving through an area where the motion detector can sense.For example, the motion detector may be placed near a door, so that if...
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Thursday, November 13, 2014

How to Build 12 Volt DC Fluorescent Lamp

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A number of people have been unable to find the transformer needed for the Black Light project, so I looked around to see if I could find a fluorescent lamp driver that does not require any special components. I finally found one...
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Wednesday, November 12, 2014

Pump Controller For Solar Hot Water System

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This circuit optimises the operation of a solar hot water system. When the water in the solar collector is hotter than the storage tank, the pump runs. The circuit comprises two LM335Z temperature sensors, a comparator and Mosfet....
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PIC12F675 and PIC12F629 datasheet

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PIC12F629 and PIC12F675 are 8-Pin Flash-Based 8-Bit CMOS Microcontrollers. The PIC12F629 and PIC12F675 devices are identical, except the PIC12F675 has a 10-bit A/D converter. They come in 8-pin PDIP, SOIC, MLF-S and DFN packages.High-Performance...
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Saturday, November 8, 2014

Class AB Power Amplifier Circuit 30w Using Power Transistor

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30W Class AB power amplifier circuit diagram using power transistor. Set the above amplifier up by adjust the variable resistor R1 to maximum and R12 to zero. After this set up is done, the activate / turn on the amplifier. Adjust...
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Simple Cheap LED flasher

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This two LED flasher circuit uses any DC supply from 3V to 12V. Flash rate is controlled by R1,C1 and R2,C2. Larger values create slower fash rates, smaller values higher flash rat...
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Wednesday, November 5, 2014

Petrol Diesel Level Sensor

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This sensor is particularly suitable for use in small spaces, such as the petrol tank of a  motorbike. It has the advantage of not having any moving parts, unlike a conventional sensor with a float and float arm that make it...
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Simple and Mini FM Receiver

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This is a very simple and mini fm radio receiver with good performances that works great even if the sensitivity is not too high. The working principle of this fm receiver may seem a little unusual. It is made of an oscillator (T2...
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Tuesday, November 4, 2014

1997 Chevrolet Z34 Monte Carlo Diagram

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Diagram for removing the headlamp assembly 1997 Chevrolet Z34 Monte Carlo   Radiator air side baffle from radiator air upper baffle. Upper fascia push-in retainer. Thumbscrews from upper headlamp. Headlamp, while...
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Preamp Stage For Ceramic Phono Cartridge Or Violin Pickups

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While we have published a number of variations on a standard RIAA preamplifier for magnetic phono cartridges, we have not published a preamp stage for ceramic phono cartridges. Typically, these were supplied as turnover cartridges...
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Monday, November 3, 2014

2N2907A datasheet

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Features •   High current (max.600mA) •   Low voltage (max.60V)  •  Lead Free Finish/RoHS Compliant(Note 1) ("P" Suffix designates RoHS Compliant.  See ordering information) DESCRIPTION...
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Sunday, November 2, 2014

1 5V POWERED LED FLASHER ELECTRONIC DIAGRAM

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1.5V POWERED LED FLASHER ELECTRONIC DIAGRAMIt is a charge pump design. This is where a capacitor (electrolytic) is allowed to charge and is then raised higher and allowed to discharge into a load. The load sees a voltage that can...
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ic 555 Infra red Light Barrier Diagram Circuit

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This is a short-range light barrier for use as an intruder alarm in doorposts, etc. The 555 in the transmitter (Figure 1) oscillates at about 4.5 kHz, supplying pulses with a duty cycle of about 13% to keep power consumption within...
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Friday, October 31, 2014

Project of UltraSonic Radar Circuit Diagram

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Simple and easy most liked project with many practical applications in security and alarm systems for homes, shops and cars. It consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. When something...
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Thursday, October 30, 2014

Lighting Up Model Aircraft Circuit Diagram

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Lighting Up Model Aircraft Circuit diagram : Lighting Up Model Aircraft Circuit DiagramAll signals are generated by a 4060 14-stage binary counter and some minimal output selection logic. Cycle time is determined by the way the internal...
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using L200 Battery Charger Circuit Diagram

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This is a simple circuit using L200 Battery Charger Circuit Diagram. A very simple battery charger circuit having reverse polarity indication is shown here.The circuit is based on IC L200 . L200 is a five pin variable voltage voltage...
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Wednesday, October 29, 2014

Low Cost Universal Battery Charger Schematic

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This is the circuit diagram of a low cost universal charger for NiCD - NiMH batteries. This circuit is Ideal for car use. It has ability to transform a mains adapter in to a charger . This one can be used to charge cellular phone,...
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Tuesday, October 28, 2014

TDA7383 35W Car Quad Audio Amplifier diagram

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The following a 4 x 35 watts channels/quad audio power amplifier circuit based IC TDA7383. The amplifier circuit is designed specifically suitable for car audio system applications. With a fairly large output power per channel, low...
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Monday, October 27, 2014

Shift registers 74LS164

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This is a TTL shift registers they use voltage source when using the 3V-5V. And it is often used along with the support of the NE555 oscillator in the lab. Image simulation.How it works: we only need to change in logic value at pin...
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Know the Line Follower Robot

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Line Follower Robot Glance - Line Follower Robot- a kind of robot which included into the category robotmobile are designed to work in an autonomous and have the ability to detect and move to follow (follows) the existing line on...
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Thursday, October 23, 2014

Simple Inverter with Two Transistors

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The series below is a simple inverter circuit that will change the voltage of 12v dc to 220v ac, with use drive transistor 32 as its tip.  Inverter circuit is very simple and easy to assemble and is perfect for just starting...
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ADC 0804 Microcontroler Interface Engineering

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Microcontroller Interface Engineering With ADC 0804In ADC 0804 interface techniques with microcontrollers are pin-pin control must be controlled if we want to use the ADC with the microcontroller, there is value addition refferensi...
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Saturday, October 18, 2014

MJ2955 78XX Increasing Regulator Current circuit and explanation

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Notes:Although the 78xx series of voltage regulators are available with different current outputs, you can boostthe available current output with this circuit. A power transistor is used to supply extra current to the loadthe regulator,...
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Friday, October 17, 2014

25L6 Amplifier

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25L6 Amplifier Schematic25L6 Amplif...
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Thursday, October 16, 2014

Simple Power Pulse Using by LM350 and NE555 Circuit Diagram

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This is a Simple Power Pulse Using by LM350 and NE555 Circuit Diagram. This circuit can use to drive lamp,power LED,DC motor etc. Adjust R5 for output amplitude.Adjust R1 for output power .Power Pulse Circuit DiagramThe LM350 is adjustable...
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12V to 120V DC DC Converter Circuit

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12V to 120V DC DC Converter Circuit Here is a simple DC DC converter schematic using a saturation-limited to push-pull converter. DC converter can be used to power the VCR from a car battery and glow plug light aircraft models from...
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Wednesday, October 15, 2014

Build a Fly back Transformer Driver Circuit Diagram

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This is an efficient flyback driver for modern cylindrical rectified television flybacks. Many sites doesnt provide circuits driving these transformers, they simply say that they are bad.I dont agree. In fact I built this circuit....
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Monday, October 13, 2014

An Alternative Pixie Known as The AP 80

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Overview The project is an improved design of the Pixie which originally consists of an LM386 audio amp and just two transistors. Explanation The design of the circuit is very straightforward although it looks like complicated....
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Muscular Bio Stimulator Circuit Diagram

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Parts: R1______________10M 1/4W ResistorR2,R3,R4_______100K 1/4W ResistorsR5,R7___________10K 1/4W ResistorsR6_______________1K 1/4W ResistorC1,C2___________22pF 63V Ceramic Capacitors (See Notes)C3______________22µF 25V Electrolytic...
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Thursday, October 9, 2014

Supply Voltage Indicator circuit and explanation

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A novel supply voltage monitor which uses a LED to show the status of a power supply. This simple and slightly odd circuit can clearly show the level of the supply voltage (in a larger device): as long as the indicator has good 12...
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