Circuit of fire alarm detection

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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USB Audio Interface based DAC PCM2902

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

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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20W Surround audio amplifier with SI 1020G

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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Hot Water Level Indicator

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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Automatic Water Pump Controller

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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Parts Needed for Motion Detector Circuit

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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How to Build 12 Volt DC Fluorescent Lamp

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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Pump Controller For Solar Hot Water System

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

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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Class AB Power Amplifier Circuit 30w Using Power Transistor

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

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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Petrol Diesel Level Sensor

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

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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1997 Chevrolet Z34 Monte Carlo Diagram

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

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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2N2907A datasheet

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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1 5V POWERED LED FLASHER ELECTRONIC DIAGRAM

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

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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