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Useful for power lines control, Simple, transformer less circuitry. This circuit, designed on request, has proven to be useful to indicate when the voltage in a power supply line is changing from 120V to 240Vac. It can be used in different circumstances and circuits, mainly when an increase in ac or dc supply voltage needs to be detected. D3 illuminates when the line voltage is approaching 120V and will remain in the on state also at 240V supply. On the other hand, D6 will illuminate only when the line voltage is about 240V and will stay on because the latching action of Q1, Q2 and related components. C1, D1 and D2 provide a low dc voltage in the 4.5V - 6V range in order to allow proper operation of latch circuit and LEDs. 110 and 220V AC LED Voltage Indicator Circuit diagram: 110 and 220V AC LED Voltage Indicator Circuit Diagram Parts: R1__________470R 1/2W Resistor R2__________220K 1/4W Resistor R3,R7_______470R 1/4W Resistors R4__________1K 1/4W Resistor R5__________2K2 1/4W Resis...

Already reached the market the first LED lamp that replaces 100 watt incandescent bulb, this was the announcement of Osram Sylvania. She becomes the first to do is replace the new lamp will join the existing line of Ultra LED 40, 60 and 75 watt (equivalent to incandescent powers), it consumes 20 watts and have a lifespan of 25,000 hours about 25 times more than incandescent bulbs.It has a CRI of 80, an illumination of 1,600 lumens and a warm white color temperature of 2700k. It also is adjustable and, of course, free of mercury and lead. First LED lamp that replaces a 100 watt incandescent

This is the Simple Cathode led Display Circuit Diagram. Teledyne TSC7135 DVM chip is used to drive a multiplexed 5-digit display. A CD4513BE CMOS IC, for common cathode drive, is used as a segment driver selected by pins 17-20 of the DVM chip. The transistors can be any suitable npn type such as 2N3904, etc.  Simple Cathode led Display Circuit Diagram

Components Required: 1) Breadboard 2) 1N4007 Diode 3) 470 ohm resistor 4) 100 Kilo ohm Potentiometer 5) LED (Any Color) 6) 9Volt Battery 7) Digital Multimeter Procedure: Connect the 1N4007 diode and 470 Ω resistor to one fixed terminal of 100 Kilo ohm Potentiometer in series. Connect the variable terminal of potentiometer to the LED in series in a breadboard.  Connect the 9V battery's positive end to the anode of 1N4007 diode and negative end to the cathode of the LED as shown in the circuit diagram below. Measure the voltage across various points by altering the potentiometer value using a digital multimeter and note the change in brightness of the LED accordingly. Circuit Diagram:     Figure 1: LED Brightness Control using Potentiometer Circuit simulation made in Multisim   Figure 2: LED Brightness Control using Potentiometer (100% Brighrness) Figure 3: LED Brightness Control using Potentiometer (50% Brighrness)

This 1.5 volt led fasher runs more than a year on a single 'd" cell and alternately flashes 2 LEDs at about a 1 second rate. The circuit employs a 74HC14 CMOS hex inverter that will operate at very low voltages (less than 1 volt). One section is used as a squarewave oscillator (pins 1 and 2), while the others are wired to produce a short 10mS pulse on alternate edges of the square wave so the LEDs will alternate back and forth. The output sections each use a capacitor charge pump to increase the voltage for the LEDs.  The circuit draws an average current of 800uA from the 'D' battery and the LED peak current is about 40mA with a fresh battery and drops to about 10mA as the battery voltage falls to 1.1 volts. The capacity of a alkaline 'D' cell is about 12 amp hours with a cutoff voltage of 1.1 so the circuit should run about 12/.0008 = 15000 hours or maybe 625 days, but I haven't verified that yet. The idea for this circuit came from a single 1.5 volt LED f...

18LEDs/feet, DC24V, 65Feet/reel, 20LM/LEDs, 288watt/reel. led strip lights link:  http://www.superlightingled.com/dc24v-led-light-strip-reel-656ft-20m-color-change-rgb-flexible-led-tape-lights-with-18-high-brightest-5050smd-ledsft-for-home-lighting-without-amplifier-p-462.html D3 led controller link: http://www.superlightingled.com/d34a3ch-max-12a-dc1224v-d-series-rgb-touch-panel-highend-controller-for-rgb-color-change-multic-colour-led-strips-lighting-warranty-5-years-p-422.html DC24V 15A 360Watt power link: http://www.superlightingled.com/360w15a-dc24v-hulled-led-enclosed-switching-power-supply-with-builtin-pfc-and-cooling-fan-p-227.html

Click to enlarge Video demo Function:   - One of the most popular electronic IC number.   There are many different symbols depending on the firm and ability to meet such as 74HC47, 74HCT47, 74LS47,.   Application:   This is a sign dedicated decoder IC for LED 7-segment common anode.   Application when it needs to display the number on the LED 7-in digital circuit without using the processor or want to save the foot.''     The mode of operation:   - Map of principle: As the diagram above, in which A, B, C, D (Connect with the processor, pulse the counter ,...), BI / RBO, RBI, LT (7447 foot control, depending on different needs will be connected), Chan QA, QB, QC, QD, QE, QF, QG, respectively connected to pin a, b, c, d, e, f, g of common anode 7-segment LED.   - Describe how the following activities:     PORT A, B, C, D: input of 7447, receiving the binary value (BCD) from 0 to 15, corresponding to each value received will decode the...

This led series will Blinking alternately, The way it works is determined by IC NE555 and transistors are used as reinforcement for each section (20 upper, 20 lower) work optimally. 555 circuit below is a flashing bicycle light powered with four C, D or AA cells (6 volts).  Two sets of 20 LEDs will flash alternately at about 4.7 cycles per second using RC values ​​shown (4.7K for R1, 150K for R2 and 1uF capacitor). Time intervals for two lights about 107 milliseconds (T1, LED on) and 104 milliseconds (T2 lower LEDs).  Two transistors are used to provide additional time beyond the current limit of 200mA from the NE555 timer. A single LED is placed in series with the PNP transistor base so that the 20 LED 555 is turned off when the output is high during a time interval T1. High-level output timer 555 is 1.7 volts less than the supply voltage. Adding the LED forward voltage increase is required for the PNP transistor to about 2.7 volts, so the 1.7 volt difference from the supply ...

This solar LED lantern can be used as an emergency light. Its 6V battery can be charged either from 230V, 50Hz AC mains or a 12V, 10W solar panel. Two LED indicators have been provided—red LED (LED1) indicates battery charging and green LED (LED2) indicates fully-charged battery. You can choose to charge the battery either from the mains power or the solar panel by using the single-pole, double-throw (SPDT) switch. Capacitor C1 (1000µF, 35V) removes ripples from the power supply and regulator IC LM7809 (IC1) provides regulated 9V DC to the emitter of pnp transistor T1 (TIP127/BD140) and pin 7 of op-amp IC CA3140 (IC2), which is configured in comparator mode.  The reference voltage of 6.3V at pin 2 of IC2 is obtained through the combination of resistor R7 (1-kilo-ohm) and zener diode ZD1 (6.3V). The comparator controls charging of the battery. Pin 3 of IC2 is connected to the positive terminal of the battery to be charged through resistor R5. When the battery is fully charged, it st...

Components Required: 1) Breadboard 2) 1N4007 Diode 3) 470 ohm resistor 4) 15 Kilo ohm Light Dependent Resistor (LDR) 5) LED (Any Color) 6) 9Volt Battery 7) Digital Multimeter  Procedure: Connect the 1N4007 diode and 470 Ω resistor to one terminal of 15 Kilo ohm Light Dependent Resistor (LDR) in series. Connect the other terminal of LDR to the LED in series in a breadboard.  Connect the 9V battery's positive end to the anode of 1N4007 diode and negative end to the cathode of the LED as shown in the circuit diagram below. Measure the voltage across various points by altering the Light input on the LDR using a digital multimeter and note the change in brightness of the LED accordingly. Observe the change in LED brightness in a dark room and in a bright light. Here I have used a cap to cover the surface of the LDR to observe the change in LED brightness. Also observe the change in resistance value of the LDR using a digital multimeter which is the cause for the alteration in LED...

After finally incubated official version led cube 8x8x8 completed.   This increased use atmega chip 32 for high-speed processor, large memory capacity means that the effect increases.   Here are some pictures of products: Video products:

Running LED with 4017 complete with PCB layout. The series of 8 LED current is the basis for creating an 8-point LED. Slightly different from the running LED with IC 4017 (decade counter), 8 running this led is lit in sequence, but that has been previously flame does not die when the led is lit afterwards. 8 led to death after led to the fire-8. Meanwhile in the running LED (decade counter), the system LED lights like "point", there is only one LED that flashes between the tenth led. The main component is the IC 74LS164 (SHIFT REGISTER), with its timer is astable multivibrator circuit (using IC NE555). The series will be more efficient when using a stable power supply (regulator) using IC Regulator 7805. Under this scheme a series of stable power supply 5 volts dc.

Signals when an on-circuit battery is exhausted 5V to 12V operating voltage A Battery-status Indicator circuit can be useful, mainly to monitor portable Test-gear instruments and similar devices. LED D1 flashes to attire the user's attention, signaling that the circuit is running, so it will not be left on by mistake. The circuit generates about two LED flashes per second, but the mean current drawing will be about 200µA. Transistors Q1 and Q2 are wired as an uncommon complementary astable multivibrator: both are off 99% of the time, saturating only when the LED illuminates, thus contributing to keep very low current consumption.  Flashing-LED Battery-status Indicator Circuit diagram : Flashing-LED Battery-status Indicator Circuit Diagram The circuit will work with battery supply voltages in the 5 - 12V range and the LED flashing can be stopped at the desired battery voltage (comprised in the 4.8 - 9V value) by adjusting Trimmer R4. This range can be modified by changing R3 and/o...

Several LED above and other components used to determine the signal amplifier, when in a state of high and low . If the signal received from the amplifier circuit is high then the LED lamp are lit up everything and more bright LED lamps, but otherwise if the received signal is low then the lights on only one or two , even absent or faint. To use the circuit you can connec with the output amplifier or speaker output , if there is reinforcing the other in the amplifier , can be connected to the output.

Project image : LED Flasher Project Image A flashing LED based on a 555 is not likely to win the first prize for originality, but such a circuit continues to be useful for all kinds of applications. The thing that makes this version special is the very low current consumption, because the LED flashes only very briefly each time (duty-cycle of only 10%) and because it was specifically designed to serve as a (fake) alarm indicator in a car. The circuit has been configured such that the flashing only starts when the ignition is switched off. Circuit diagram :  LED Flasher Circuit Diagram The latter could have been achieved in the usual way with the aid of two resistors and a transistor connected to the reset line. But by using a clever trick instead, this has become even simpler. The +12 V connection from ‘behind’ the ignition key is connected to the threshold input via diode D3. The astable multi-vibrator is held in the inactive state whenever this point is at +12 V. Only when the i...

Make a series letters from the LED , Things to consider before making the sign of the LED array, 1) Use LED nodes. 2) Paint the top of the PCB with a dark color (black). 3) Note the LED specifications. In this experiment use a 5mm diameter LED nodes that emit red, specification voltage of 3 volts. The assembly of LED: 1) One letter composed at most 5 columns and 7 rows. 2) One column mostly composed by 6 LEDs are arranged series. 3) Then the fifth column are connected in parallel. 4) Each column given the constraints, Rx, which amount depends on the number of LEDs in one column and depends also on the type of LED (in this experiment that used LED 5mm in diameter, clear with red light beam). 5) In a column consisting of 6 LEDs, Rx = 330 ohm, 5 LEDs, Rx = 560 Ohms, 4 LEDs, Rx = 680 Ohms Remember, this provision applies to 5 mm LED red light beam nodes. 6) Every letter was given FCS9013 transistor amplifier. Here is one letter LED scheme. Medium picture below is the lay out of the 2-lette...

SSL3250A PHOTO FLASH LED DRIVER ELECTRONIC DIAGRAM These properties caused this device has long battery life and low power strain. Another features that this device has are protecting the battery and LED from overloading, trouble free operation such as overtemperature, over voltage, time-out function, undervoltage lockout, and feedback shorted protection.

For beginners, it's their 1st project that offers them a lift. And so as to induce that, it's continuously necessary to create positive that the project that you just choose is basically helpful. One such project is that the RGB light-weight fader. this is often quite straightforward and may be done simply by a beginner. scan on to understand a lot of concerning this.  Concerning twenty LEDs are needed here. begin by wiring all the LEDs and connecting it to a breadboard. this is often quite a tedious method and takes quite plenty of your time.  ensuing step is to create the ability board. Quite plenty needs to be done to drive all the LEDs employing a single PWM channel. therefore to atone for this, a multiplexer IC is employed. a couple of voltage conversions is also needed in such a case.  As mentioned earlier, one PWM is employed to regulate 3 totally different channels. The MSP430 is employed to modify between the various channels. this offers the impression that ther...

Advantages and disadvantages of LED Advantages: 1.        Low working voltage and currents. 2.        Less power consumption. 3.        No warm up time. 4.        Very fast action. 5.        Emission of monochromatic light. 6.        Small size and less in weight. 7.        No effect of mechanical vibrations. 8.        Less fragile than glass. 9.        Extremely long life. Disadvantages: 1.        Sensitive to damage by over voltage or over current. 2.        Wide optical bandwidth compared to lasers. 3.        Temperature dependent of radiant output power and wave length. 4.        Theoretical overall ...

Using LTC3600 manufactured by Linear Technology, can be designed a very simple high efficiency LED driver with programmable dimming control . LTC3600 is a monolithic synchronous buck regulator whose output is programmed with just one external resistor. LED Driver Using LTC3600 Circuit Diagram This LED driver with programmable dimming control electronic project circuit diagram has a dimming current between 20 and 500mA. In this circuit diagram are used three LUXEON LXML-PWN1-0100 neutral white 350mA LEDs.