LED Circuits
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Simple proximity detector circuit based on NE567 IC. Circuit switches an LED when the object comes near the sensor.... -
The circuit in Fig. 1 uses a single bicolor LED to indicate both power-on and blown-fuse conditions. Regardless of the condition of the fuse, the green side of the LED is always on for each positive half-cycle of the ac input. With a 120Vrms ac input.... -
Hi everyone! I found this circuit in my computer (i don`t remember where i got it and when) and i was wandering if it`s able to dim 220V LED BULBS? it .... -
Control a LED with audio signal, but the problem is, that output signal is only 150mVpp (with 150mVpp positive offset). In my understanding, it needs to be higher than 0. 6V to get the transistor running, therefore I am not sure what to use instead. Do I.... -
The AS3636 is a highly integrated Photoflash charger including IGBT driver, inductive DCDC boost autofocus/ video LED driver, an indicator LED driver and it includes system level ESD protection and a .... -
LED's are great display tools. Their prices have decreased to a point where they are replacing more conventional light sources. In one sense their characteristic need for low voltages is an advantage e.g compatibility with I.C drives, but this voltage.... -
This webpage describes a highly efficient LED dimmer, or a dimmable LED flashlight, or a switching current source, or whatever you want to call it. Cheap, single-IC, uses commonly available parts, easy to build. Designed to get the longest light out of a.... -
The diagram is lamp dimmer which has the function of light gradually, gradually eliminate. It does not appear the light stimulation of the human eye when the lights suddenly illuminated, and also can reduce the damage when open lamp impact current to the.... -
I have a 4 position slide switch according to the position of the slide switch, I should turn on different colored LEDs and also vary the output frequency of 555 timer in astable mode and drive a piezo buzzer. Problem : I cant use the same switch to control.... -
A very simple LED torch can be designed using the NSI45090JDT4G adjustable constant current regulator (CCR) designed by ON Semiconductor, using extreme few external components. NSI45090JDT4G device is designed to provide a cost effective solution for.... -
With an an input sinewave on the left amplifier base, here`s what happens: The collector output rises above or falls below 6. 6 volts. Of course, the amplifier increases signal level and inverts the signal. Because the output is roughly centered, the chances.... -
I recently purchased 10 SLM1608 (SLM1606) LED matrix display units from Ebay (you might also contact the seller directly at [email protected]). These are 16x16 LED matrix units with a green and a red LED per pixel allowing each pixel to be switched to either.... -
LED 12 Volt Lead Acid Battery Meter Circuit 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.... -
Using the LM3410 constant current LED driver is a monolithic IC we can design, many high efficiency and low cost lights, using just few electronic components. The LM3410 utilizes current-mode control and internal compensation to provide high-performance over.... -
Have your already set up a Christmas tree in your house and decorated it with traditional lights? Build a couple of these led lights to enhance the Christm.... -
Figure 1 shows a method for driving all the LEDs with a single driver IC from Catalyst Semiconductor (www.catsemi.com), the CAT32. Power comes from a single lithium-ion battery cell. A FET switch can independently turn off the group of six LEDs. The shutdown....
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This circuit was designed as a warning flasher to alert road users to dangerous situations in the dark. Alternatively, it can act as a bicycle light (subj.... -
Using inexpensive components, you can fit a simple probe circuit into a pencil-sized enclosure. When both LEDs are on, the probe indicates the presence of an ac voltage; either LED alone indicates the presence and polarity of a dc voltage. The diode-bridge.... -
Although this design is reproduced directly from the manufacturer s datasheets, its use in this application is rather novel. Originally intended for high-.... -
Convert a used CFL into a power saving LED lamp circuit that consumes only 50mA. This gadget can be used in applications like night light, table lamp etc.... -
Two LED CMOS Flasher Circuit Diagram This is a simple 2 led cmos robot ( flasher, multivibrator ) circuit using CD4069 six inverter.... -
The hardware within this circuit involved a Picaxe 18M2 IC which is the programmable micro-controller in my design which can be programmed using a PC,.... -
This is a basic dark detector/sensor circuit diagram based on a Photo Resistor (LDR) and few numbers of parts.... -
Before you use LEDs, it`s a good idea to check them out. With a LED tester, you can even do it in the dark! LEDs are available nowadays in all shapes and colors. There are types with clear, colorless packages, while others have colored plastic packages. Many.... -
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being connected to the motherboard via a two-pin connector. However, this LED only works with IDE drives, and if a SCSI disk controller is fitted, its activity will not.... -
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BFP640 used for 1575 MHz Global Positioning Satellite (GPS) Applications BFP640 is investigated for use as an LNA for 1575 MHz GPs Design Goals: Gain = 16 dB min, Noise Figure -14. 8 dBm min Printed Circuit Board used is Infineon Part..
New Circuits
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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
This project is a real winner in more ways than one. When you understand how the circuit works,...
GSM based Automatic meter reading, or AMR, is the technology of automatically collecting data...
The shift pulse amplitude is less than 15 volts. If a stage is off, the shift pulse will not be...
Remove the 6 mm screw holding on the lower rear fairing cover. This is the black plastic piece...
One of the simplest method of metal detecting is by beat frequency oscillator. Basically, the...
The CD4001 quad 2-input NOR gate is a very versatile IC that can be used in an almost infinite...
This is a small size led flasher built with the 555 timer IC that is powered from 2 x 1. 5V...
The Cymbal monoblock power amplifier is a unique and modern push-pull design using ultra-linear...
Construct universal power supplies, including: Low-voltage power supplies for operating...