LED Circuits
- Page 11-
This circuit will flash a bright or high-brightness red LED (5000 mcd). Great for fake car alarm or other awareness getting equipment. Component values aren`t significant, attempt anything else first from the junkbox. Obviously, the 470 ohm resistor (R3).... -
This LED flasher circuit is a classic two transistor flip flop. This flasher circuit is very popular and it`s usually the first circuit to build when starting electronic circuit building hobby. Here is the schematic diagram of the famous LED flasher circuit:.... -
This LED flasher give similar circuit with the previous transistor LED flasher, but this circuit use a 555 integrated circuit chip as the active component. Here is the schematic diagram of the LED flasher circuit: This circuit gives alternating LED flashing,.... -
Physicians and repair engineers often use small light pens for visual examination Spurposes. Rugged and expensive as these pens may be, their weak point is the bulb, which is a serviceable` part. In practice, that nearly always equates to expensive` and / or.... -
This is Circuit LM3914 LED VU Meter. use IC1-LM3914 and Transistor BC109C, By circuit will show level of audio signal(power Music) is dB in six level by LED... -
Typical segment displays LEDs consume around 25 mA for each segment and should be limited to it with resistors. If a six digit display is to be current limited, at least 42 series resistors are needed. The brightness of the LEDs are dependent on the output.... -
The circuit was conventionally designed with eight LED audio level meter made out of two low power quad op-amps which utilizes LM324. Volume Unit ... -
The schematic diagram below appears LM3909 Typical 1.5V Flasher circuit. It is known that LM3909 is an oscillator, a monolithic one, which is designed to flash Light Emitting Diodes (LED).. -
Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. This is an easy to build, but nevertheless very accurate and useful.... -
This is a simple light running circuit by music This circuit is not difficult, is MONO, with a few accessories. Can be connected to the output of a CD or... -
The herein schematic diagrams TPS61042 Current LED driver powering 8 LEDs with 81% efficiency at 3.6V/18.6mA. TPS61042 used to be applied in applications such White LED Supply for Backlight/Sidelight Displays (PDA, Pocket PC, Smart phones, etc).. -
The benefit of LED is longer lifetime than incandescent lamp, and even higher efficiency in latest LED technology. LED is also very compact, but unfortunately... -
This is a circuit diagram showing the random nature of LED 7 segment. In the diagram circuit IC1 - LM555, R1, R2 and C2 on the circuit a sensitive multi-Stable... -
This is Resonant Mode LED Driver circuit. This circuit is used to give a constant DC current through a string of a given number of LEDs. This circuit uses... -
AN6884 is a logarithmic scale LED bar display driver. AN6884 accept wide range of supply voltage, ranging from 3.5V to 16V. This VU (voltage unit) bar display... -
You can save on your electricity bills by switching to alternative sources of power. The photovoltaic module or solar panel described here is capable of delivering a power of 5 watts. At full sunlight, the solar panel outputs 16. 5V. It can deliver a current.... -
This ultra-bright white LED lamp works on 230V AC with minimal power consumption. It can be used to illuminate VU meters, SWR meters, etc. Ultra-bright LEDs available in the market cost Rs 8 to 15. These LEDs emit a 1000-6000mCd bright white light like.... -
Here is VU meter 10 LED circuit, This simple LED VU meter has only a few parts but it is useful as an indicator for the sound. The circuit is built around an... -
Below is a comparator circuit which is can measure with step of 1 volt, the voltage of car battery. The indication of voltage is done by comparison of? ... -
This White LED lights illuminates your porch with cool white light. The circuit is too simple and energy saving design. Its current consumption is practica... -
ZXLD1100 is a PFM flyback DC to DC boost converter that work in discontinuos mode. The following circuit diagram show you about setting 4 LED Driver for Handset LCD Backlight using this device. The ZXLD1100 designed for driving 2,3,4 series connected white.... -
This is the 200W lamp flasher circuit diagram. The frequency/speed of the lamp flashing can be adjust with the range of 1Hz to 5Hz. You can use the PR1 variable resistor (trimpot) to adjust the flashing speed. The duty cycle of lamp flashing can be adjusted.... -
The following circuit is six LED stereo VU display diagram which build using Dot/Bar Display Driver IC LM3915. This VU disply should be connected before amplifier module circuit. You may connect this circuit at pre-amp output, tone control input/output or.... -
The circuit is a LED driver which responds to ambient lightas wellas to the presence of any intruder, and varies its illumination accordingly, lets know more. Also I would like to have an ambient sensor to switch on and off and a proximity sensor to switch.... -
The LED meter circuit is simpler and smaller than its analogue counterpart, and is very common in audio equipment. This circuit is based on LM3915 IC and uses the logarithmic version. This circuit is using a single IC and a few discrete components. The extra.... -
LED light chaser circuit typically refers to an electronic configuration able to generate or illuminate a group of LEDs in somepredeterminedsequence. One popular IC 4017 is very commonly employed for making this type LED sequencer circuit. The IC basically.... -
The following article describes a fancy LED sequencing/diverging ring type light which can be used as a tail brake light in cars. The circuit idea was requested by one of the avid readers of this blog, Mr. Bobby. lets learn more. Could this circuit be.... -
This project involves constructing an energy efficient broad spectrum LED lamp system. The lamp is useful for indoor reflective room lighting. It has a broad color spectrum that more closely approximates the light of the sun when compared to fluorescent.... -
In the circuit below, a quad voltage comparator (LM339) is used as a simple bar graph meter to indicate the charge condition of a 12 volt, lead acid battery. A 5 volt reference voltage is connected to each of the (+) inputs of the four comparators and the.... -
This is a simple LED flasher project that uses a common 555 timer IC for its operation. It is configured as an astable mode which means that its output is a square wave oscillator. Two LEDs are connected to its output in such a way that when one LED is ON,.... -
This circuit uses two quad op-amps to form an eight LED audio level meter. The op-amp used in this particular circuit is the LM324. It is a popular IC and should be available from many parts stores. The 1K resistors in the circuit are essential so that the.... -
This circuit is a circuit run on alternating two insignia. It uses the 2-color LED with a built-participating in 3-pin single. This preference look for away the glow of every LED until the base. It turns alternating to one more color. In in the least way to....
New Circuits
-
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
The Inter-Power SWR-5 - upper right - "isn't worth a penny". Got it from a mate to use with a...
A straightforward circuit using a LM311 for the level detector and a CMOS analog gate to...
All capacitors in this circuit are disc ceramic. Fixed-value resistors are 1/.-or 1/2-W carbon....
For multiplying frequencies in the 1-to 150-Hz range, this circuit uses a 4046B and a 100...
The LTC1063 is the first monolithic low-pass filter that simultaneously offers outstanding dc...
Analysis of simple digital circuits means to determine how the circuit behaves, which is...
This is a project that I always wanted to do, but managed to put off for a long time. It has been...
Although this may be a basic question but I`m still struggling with it. In this schematic, two...
Just connect 22k fixed resistors across each transistor base and ground and then you may connect...
A strobe light passes a brief, intense pulse of electric current through a gas, which then emits...
This is the FSK modulation circuit composed of 74LS74. The FSK modulation circuit has neither PLL...
That circuit is similar in concept to the BK Butler/Tubeworks Tube Driver. Since there is only a...