There will be instances where the currents from each supply will be unequal. Where this is the case, the resistor divider is not sufficient, and the +ve and -ve voltages will be unequal. By using a cheap opamp (such as a uA741), a...
Tuesday, April 30, 2013
Sunday, April 21, 2013
LED FLASHER WITH ONE TRANSISTOR
This is a unique flasher circuit employing a single driver transistor that takes its flash-rate from a flashing LED. The flasher within the photo is 3mm. An ordinary LED wont work. The flash rate can not be altered by the brightness...
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flasher,
led,
one,
transistor,
with
Vocal Adaptor for Bass Guitar Amp
These days, music is a major hobby for the young and not-so-young. Lots of people enjoy making music, and more and more dream of showing off their talents on stage. But one of the major...
Saturday, April 13, 2013
Tandem Doorbell
The creator had a problem: the neighbours had exactly the same kind of doorbell as he did (actually a 50 Hz buzzer), so it used to ben’t always clear who wanted to reply to the door. To keep away from confusion, the writer...
Maximum Minimum Voltage Indicator
This\r\n circuit indicates which of three voltages in the vary from about about\r\n -4V to about +4V - at A, B and C - is the very best by way of lights one in all \r\nthree indicator LEDs. Alternatively, it may be wired to point...
Type of UPS Uninterruptible Power Supply
UPS design of the model is divided into several types that produce different performance characteristics:A. Standby2. Line Interactive3. Double Conversion On-Line4. Delta Conversion On-LineStandby UPS typesThis type is commonly used...
Friday, April 12, 2013
Step Up Booster Powers Eight White LEDs
Tiny white LEDs are capable of delivering ample white light without the fragility problems and costs associated with fluorescent backlights. They do pose a problem however in that their forward voltage can be as high as 4...
Simple Bass Treble Tone Control
The LM1036 is a DC keep watch overled tone (bass/treble), quantity and balance circuit for stereo utilitys in automotive radio, TV and audio methods. An extra keep watch over enter permits loudness compensation to be merely effected....
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...
1996 Chevrolet Camaro Z28 Wiring Diagram
1996 Chevrolet Camaro Z28 Wiring DiagramThe Part of 1996 Chevrolet Camaro Z28 Wiring Diagram: instrument cluster, tachometer, black wire, yellow wire, red wire, crankshaft, power distribution,camshaft position sensor, tachometer output,...
Simple Remote Doorbell Warning Switch Circuit
This circuit should only be used with the solenoid type chime doorbells, the electronic type that play tunes will not work here. This is the simple circuit design.The basic principle work is the hardest part for this circuit was the...
Thursday, April 11, 2013
Little Door Guard
If some intruder tries to open the door of your house, this circuit sounds an alarm to alert you against the attempted intrusion. The circuit (Fig. 1) uses readily available, low-cost components. For compactness, an alkaline 12V battery...
Mobile Car Stereo Player
Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music player with the help of a stereo power amplifier. This does away with the need of a sophisticated...
Mini High Voltage Generator Circuit
Here’s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you’ve gone swimming; you might equally well use it at the office or workshop when you go back to...
Superstock Mechanics Workingthrust Reverser Regional
Aircraft Mechanic.Wren Aircraft Mechanic.Aircraft Mechanic Average Salaries Ehow Com.Aircraft Mechanic On Duty Military Life Careers Defence Forces.Superstock Two Mechanics Working On A Thrust Reverser For A Regional.Jet...
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mechanics,
regional,
reverser,
superstock,
workingthrust
Loudspeaker Protector Monitors Current
This circuit uses a 0.1O 1W resistor connected in series with the output of a power amplifier. When the amplifier is delivering 100W into an 8O load, the resistor will be dissipating 1.25W. The resulting temperature rise...
Labels:
current,
loudspeaker,
monitors,
protector
Wednesday, April 10, 2013
Voltage Tester for Model Batteries
With a suitable load, the terminal voltage of a NiCd or lithium-ion battery is proportional to the amount of stored energy. This relationship, which is linear over a wide range, can be used to build a simple battery capacity...
With Auto Sound Systems Newest Technology isnt Necessarily Greatest Technology
We live in a world where music is our constant companion. We take it with us to the beach, to work, to exercise, even while riding bikes or talking on our cell phones. It only makes sense that in our cars we would like to have the best possible auto sound systems our hard earned dollars can buy. The problem is that new technology is being introduced to the market each and every day and many of us feel as though if we hold our...
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auto,
greatest,
isnt,
necessarily,
newest,
sound,
systems,
technology,
with
Let’s to build a mini organ keyboard circuit using UM3511
The previous
day my son said ” A friend has a mini organ. Casio SA-76 44 Key Mini
Keyboard, Orange It is Good quality but expensive.My son would have
the same. But I said, as we are the Electronic inventor, to try to...
1995 Lincoln Town Car v 8 Wiring Diagram
1995 Lincoln Town Car v-8 Wiring Diagram(click for full size image)The Part of 1995 Lincoln Town Car v-8 Wiring Diagram : glove box lamp switch, glove box, left vanity mirror lamp, switch, grounds, solid state, garage...
VFD Talking Alarm Clock
Are you having a hard time waking your hubby from sleeping? And when you leave the house for work, are you in doubt that he has not gotten out of bed? One thing that will stop your worries is to use this clock that does not...
Tuesday, April 9, 2013
1 Watt QRP Power Transmitter
The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP
transmitter that can be used in combination of one of the simple
receivers. Normally these designs have only two transistors: one...
Labels:
1,
power,
qrp,
transmitter,
watt
Electronic Telephone Ringer
This circuit produces a ringing sound similar to that made by more recent telephones. It consists of three almost identical oscillators connected in a chain, each generating a square-wave signal. The frequency of each oscillator depends...
Labels:
electronic,
ringer,
telephone
Tone control include subwoofer out
PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwoofer low pass filter of the second order Sallen Key Design. The roll-off...
30W Audio Amplifier based TDA7296
The audio power amplifier of this scheme is a power amplifier based on TDA7296 chip. The audio amplifier is a class AB amplifier, which can be used in high fidelity (stereo, speakers powered car, TV five stars). The maximum output...
60 Watts mono Amp
This is a circuit diagram of 60 Watts output class B power amplifier. The supply voltage is 48 Volts. We recommend not increasing the voltage if you want to run the amp long time. You can build this amplifier for low cost. The output...
Monday, April 8, 2013
USB Soundcard Circuit with PCM2702
Creating a sound card is not more complex problems. If you use Great IC PCM2702 from Burr RED / Texas Instruments you can create a card USB sound fully functional. The sound card can be activated from the USB port and...
9 Volt Power Supply Circuit Diagram Using IC 7809
You can see below 9 Volt Power Supply Circuit Diagram Using IC 7809
Description
Circuit showing a 9 volt power supply .
Here we have used a bridge rectifier and 7809 ic for...
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