Saturday, August 31, 2013

Automatic Automotive Burglar Alarm

Alarm triggers on after a 13 second delay and stays on for 1-1 Vfe minutes. Then it resets automatically It can also be turned off and reset by opening and reclosing SI.

Automotive Burglar Alarm Circuit Diagram
Automotive Alarm Circuit Diagram

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Friday, August 16, 2013

18W Car Stereo Amplifier Rise

This automobile stereo amplifier project is a class AB audio power amplifier using the Hitachi HA13118 module. It not only can be used in automobile application but also in any transportable or home amplifier process. It is simple to construct & has a maximum of outside parts. The module has a high power output from a low voltage supply using the bridge tied load system, & a high gain of 55dB.

This project will be useful in applications where the input signal is a low level, without requiring the use of a separate pre-amplifier. This IC module has a built in surge protection circuit, thermal shutdown circuit, ground fault protection circuit & power supply fault protection circuit making it reliable.
The Specifications of this project 
D.C. Input : 8 – 18V at 1-2 A

Power output : 18W maximum, 4 ohm load, 18V DC supply

S/N ratio : > 70 dB

THD : < 0.2% @ 1W

Freq. Response : ~ 30 Hz to 30 kHz, –3 dB

Input level : < 25 mV, for full output (G > 50dB)

Input Impedance : ~ 30 k ohm

The supply voltage necessary for this project is 8 -18V DC, at least one to two Amps. Maximum output power will only be obtained with a power supply of 18V at greater than two A, using a four ohm speaker. The power supply ought to be well filtered to reduce mains hum, a regulated supply will reduce noise even further. Additional filtering is unnecessary if operating from a battery supply.

Circuit Diagram Description

Most of the circuitry is contained within the amplifier module. C10 is the input coupling capacitor and blocks DC from the input. C11 bypasses any RF which may be present at the input. C1 & C2 provide an AC ground for the inverting inputs of the IC. R1/C7 and R2/C8 provide a high frequency load for stability with difficult speakers. C five & C six provide bootstrap feedback for the IC. C9 & C12 provide power supply filtering.


An externally mounted logarithmic potentiometer of between 10k ohm and 50k ohm, is used depending on the desired input impedance. The impedance ought to be keep as high as feasible for a guitar amp, unless using a separate pre-amp. Make sure-that the heat sink is mounted to the module.



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Thursday, August 15, 2013

Simple Diodeless Rectifier Circuit Diagram

Simple Diodeless Rectifier Circuit Diagram. It`s common knowledge that when working with single-supply op amps, implementing simple functions in a bipolar signal environment can be difficult. Sometimes additional op amps and other electronic components are required. Taking that into consideration, can any advantage be attained from this mode The answer lies in this simple circuit (A). Requiring no diodes, the circuit is a high-precision full-wave rectifier with a liigli-frequency limitation equalling that of the op amps themselves.

 Look at the circuit`s timing diagram (B) to see the principle of operation. The first amplifier rectifies negative input levels with an inverting gain of 2 and turns positive levels to zero.The second amp, a noninverting summing amplifier, adds the inverted negative signal from the first amplifier to the original input signal. The net result is the traditional waveform produced by full-wave rectification. In spite of the limitation on the input signal amplitude (it must be less than VCCJZ), this circuit can be useful in a variety of setups. 

 Diodeless Rectifier Circuit Diagram

Diodeless Rectifier Circuit Diagram
 
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Wednesday, August 14, 2013

Battery Charge Discharge Indicator Circuit Diagram

This Battery Charge-Discharge Indicator Circuit Diagram monitors car battery voltage. It provides an indication of nominal supply voltage as well as low or high voltage. RV1 and RV2 adjust the point at which the red/yellow and yellow/green LEDs are on or off. For example the red LED comes on at 11V, and the green LED at 12V. The yellow LED is on between these values.


Battery Charge-Discharge Indicator Circuit Diagram

Battery Charge-Discharge Indicator Circuit Diagram

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Tuesday, August 13, 2013

Programmable Gain Amplifier Circuit Diagram

Programmable Gain Amplifier Circuit Diagram . The circuit uses the DG212 which controlling the gain using resistors. To calculate the different gains SW4 should be closed. Gain error is determined only by the resistor tolerance op amp offset and CMR will limit accuracy of circuit . 

Programmable Gain Amplifier Circuit Diagram

Programmable Gain Amplifier Circuit Diagram


Click here to download DG212.pdf datasheet.

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Monday, August 12, 2013

Rj45 Pinout Wiring 10baset 100baset Connection

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Rj45 Pinout Wiring How To Make Up A 10baset 100baset Connection Eia.


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Cat5 B Wiring Diagram.


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Tech Info Lan Wiring And Pinouts.


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Quickand Dirty Cat 5 Wiring Howto.


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Tia Eia 568a 568b Standards For Cat5e Cable.


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Peak Electronic Design Limited Ethernet Wiring Diagrams Patch.


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Terminating Rj 45 Cat5 Cat5e Cat6 Data.


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100 Mbit Cat 5 Network Cable Wiring Pinout And Wiring Pinouts Ru.


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Figure A Standard Eia Tia T568b Wiring Diagram.


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Cat 5 Wiring.


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Sunday, August 11, 2013

Wiring Diagram Electrical Components Symbols House Home

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Electrical Wiring In The Home Wiring 2 Switches To 4 Lights.


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Home Electrical Blueprint.


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Electrical Floorplans With Power Low Voltage And Structured Wiring.


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Home Electrical Wiring New Home Remodels Additions As You Wish.


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Electrical Wiring In The Home Wires Are Not Hot In Electrical Outlet.


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Home Electrical Wiring Trainers Kelvin Com.


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Twelve Common Wiring Problems By Rex Cauldwell.


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Electrical Wiring In The Home Wiring Nightmare Switch Phila.


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All About Wiring Diagrams.


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Wiring Diagram And Electrical Components Symbols For House Or Home.


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Saturday, August 10, 2013

Free Wiring Diagramsdownload Free Wiring Schematics

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How To Install Electrical Wiring Doityourself Com.


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Wiring Diagram And Electrical Components Symbols For House Or Home.


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How To Fix Electrical Wiring In The Home With Electrical Ground.


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The Hills Home Wiring Networks Delivers And Distributes Data Phone.


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Electrical Nonmetallic Tubing And Fittings Nec 362 Ul 1653.


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Home Electrical Wiring Guide That Has Electrical Diagrams Electric.


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Free Wiring Diagrams Download Free Wiring Schematics.


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By J Ray Mcreynolds 256 Step By Step Guide To Home Wiring Price.


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Friday, August 9, 2013

16th Edition Wiring Regulationsdesign Verification

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Barnes Noble 17th Edition Iee Wiring Regulations Explained.


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16th Edition Iee Wiring Regulations Design Verification Of.


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17th Edition Iee Wiring Regulations Design And Verification Of.


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17th Edition Iee Wiring Regulations Design And Verification Of.


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17th Edition Iee Wiring Regulations Explained And Illustrated Ninth.


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Source Iee Wiring Regulations Table 4d2a.


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Iee Wiring Regulations 17th Edition Amazon Co Uk Lighting.


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Iee Wiring Regulations Inspection Testing And Certification Iee.


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Thursday, August 8, 2013

A Friendly Charger Circuit for Mobile Phones

Most mobile chargers do not have current/voltage regulation or short-circuit protection. These chargers provide raw 6-12V DC for charging the battery pack. Most of the mobile phone battery packs have a rating of 3.6V, 650mAh. For increasing the life of the battery, slow charging at low current is advisable. Six to ten hours of charging at 150-200mA current is a suitable option. This will prevent heating up of the battery and extend its life.

Circuit diagram:

A Friendly Charger Circuit  For Mobile Phones A Friendly Charger Circuit Diagram For Mobile Phones

Parts:

Resistors:
P1 = 10K LOG
R1 = 1K
R2 = 1K
R3 = 1K
R4 = 1K
R5 = 3.3K
R6 = 16R/2W
R7 = 220R
R8 = 3.3R
R9 = 1K

Capacitors:

C1 = 470uF/25V
C2 = 10uF/25V
C3 = 1KuF/25V

Semiconductors:

D1 = Red LED
D2 = Green LED
Q1 = BC547
Q2 = BD677
ZD1 = 12V/1W
ZD2 = 5.6V/1W
IC1 = CA3130

Description:

The circuit described here, provides around 180mA current at 5.6V and protects the mobile phone from unexpected voltage fluctuations that develop on the mains line. So the charger can be left ‘on’ over night to replenish the battery charge. The circuit protects the mobile phone as well as the charger by immediately disconnecting the output when it senses a voltage surge or a short circuit in the battery pack or connector. It can be called a ‘middle man’ between the existing charger and the mobile phone.

It has features like voltage and current regulation, over-current protection, and high- and low-voltage cut-off. An added specialty of the circuit is that it incorporates a short delay of ten seconds to switch on when mains resumes following a power failure. This protects the mobile phone from instant voltage spikes. When short-circuit occurs at the battery terminal, resistor R8 senses the over-current, allowing Q1 to conduct and light up D1. Glowing of D2 indicates the charging mode, while D1 indicates short-circuit or over-current status.

The value of resistor R8 is important to get the desired current level to operate the cut-off. With the given value of R8 (3.3 ohms), it is 350 mA. Charging current can also be changed by increasing or decreasing the value of R7 using the ‘I=V/R’ rule. Construct the circuit on a common PCB and house in a small plastic case. Connect the circuit between the output lines of the charger and the input pins of the mobile phone with correct polarity.

Author : D. Mohan Kumar Copyright : E F Y


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Tuesday, August 6, 2013

Subwoofer Speaker Level Input Output Connection

Subwoofer Wiring on How To  Additional Subwoofer System Wiring Connection For Vw Golf Iv
How To Additional Subwoofer System Wiring Connection For Vw Golf Iv.


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Fig 7 Follow This Wiring Diagram And You Should Have No Problems With.


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Circuit Diagram For Car Subwoofer Driver From Redcircuits Circuit.


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Click Here To Download The Swan Wiring Floor Plan Pdf.


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Powered Subwoofer Wiring Diagram Subwoofers And Other Stereo.


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Car Audio Speaker Subwoofer Wiring.


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Subwoofer And Avr Speaker Level Input Output Connection.


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Schematic Diagram For Subwoofer Amplifier Wiring Diagram.


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Subwoofer Wiring Diagram.


Subwoofer Wiring on Basic Subwoofer Wiring  For More Information  Check Out Our Subwoofer
Basic Subwoofer Wiring For More Information Check Out Our Subwoofer.


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