555 Timer Circuits
555 Timer Circuits
Spot lamp dimmer by LM555 and TIP2955
This circuit is DC Dimmer Circuit. By use IC LM555 be model Astable Multi vibrator. It is can change translate Duty Cycle with fining VR1 and VR2 be..
Automatic Rain Sensing Wiper System using 555 Timer
Have you seen Audi, Lexus or Ford rain sensing wipers and wondered how they work in these vehicles They are handled by sensors at the center of the windscreen which detects rain water and turns on the wiper motor. Here is the working of rain sensitive wipers with circuit schematic. The main component of this circuit is a 555 timer IC that works i
Code Practice Oscillator Using 555 Timer
This simple code practice oscillator project for beginners to Continuous Wave Morse Code uses a 555 timer to generate a dit or dah sound when the key is pressed
555 timer IC
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation and oscillator applications. The part is still in widespread use, thanks to its ease of use, low price and good stability. As of 2003 [update], it is estimated that 1 billion units are manufactured every year.  The IC design was proposed in 1970 by H
555 Voltage Doubler Relay Driver
These novel relay driver circuits have the ability to pick up a relay with a coil voltage rating equal to double Vcc. After pickup, the relay armature is h..
555 square wave generator
Hello, Please help me, I have designed a very basic square wave generator to run a speedometer circuit board which is providing output to control a..
Simple Car theft alarm system circuit using NE555
Utility vehicle anti-theft alarm circuit as shown. It is mainly composed of two major anti-theft alarm circuit parts and components. Security circuit: When the car owner left the car, it will be placed on anti-theft switch S B, and make the..
power width modulator with 555
This circuit called as PWM ( Power Width Modulator) with 555. where this circuit can arrange 12V motors and DC bulb. There is no coolrib needed to by Q1 or D3..
police siren using NE555
dancing light using 555 timer
A dancing light can be easily constructed using a 555 timer wired in astable mode. Please read the article Astable Multivibrator using 555 Timer before continuing. This circuit blinks two LEDsalternativelywith some delay and it can be easily modified to include more LEDs or for controllingincandescentlamps. Time period of oscillation is determined
Laser Beams and 555
A laser trip wire that actuates a camera. An ambient light sensor by Vishay, the TEMT6000 [ datasheet ] from Sparkfun Electronics, acts as an NPN transistor attached to a 555 in BiStable mode. The output is sent to a logicinverter for quick visual status, then off to another 555in Monostable configuration. The output from that 555 canbe used to actuate any number of devices
Water Activated Sensor Alarm Using 555 PCB
The circuit comprises a 555 IC as the core. This is designed to work as an astable multivibrator. When we connect a positive 9 volt to pin no. 8, the circuit will produce a sound through speaker. But here the connection to pin 8 goes through the transistor BC 109c or BC 548. In this condition, the base of the NPN transistor haven`t any positive vo
Metal detector using 555 timer
transistors IR Emitter/Detector with 555 timer alarm
This circuit detects when a tube is empty and pulses a piezo buzzer in. 5 second intervals. I have it working with 5v on a breadboard, but I need to move it to 12v from a wall wart. Secondly, with 12v R1 should be 220 1W, but I want to stick with 1/4W resistors, maybe 510. Is that possible I realize that will bring down the 50ma current to QEE113 to 22mA, but my distance is only 1" so I think...
servo tester circuit with 555
555 timer based light seeking robot
The schematic diagram of this robot is very simple to understand. As I had mentioned earlier I just modified a circuit from on of the books to create..
Simple 555 Switching Circuit Provides Negative Supply from Single Positive Supply
If you need a negative supply for op-amp or just need negative bias voltage while operating from a single supply voltage (for battery operation for example),.
1 Hz Pulse Frequency Generator with 555
A 1Hz pulse/frequency generator using the popular timer IC 555 which is wired as an Astable Multivibrator. The output pulses can be indicated visually by the LED. An Astable Multivibrator, often called a free-running Multivibrator, is a rectangular-wave generating circuit. Unlike the Monostable Multivibrator, this circuit does not require
555 Capacitor Tolerance Adjustment circuit
The 555 Timer shown below is configured as an 555 Astable Multivibrator previously discussed. However additional components have been added to enhance the operation of the circuit. As soon as the circuit is powered up the 555 will begin producing a square wave determined by the value of Capacitor C1 and Resistors R1 and R2, as determined by the ti
12vdc to 220vac inveter using ic 555
This 12VDC to 220VAC inverter circuit produces an AC output at line frequency and voltage. The 555 is configured as a low-frequency oscillator, tunable over the frequency range of 50 to 60 Hz by Frequency potentiometer R4. The 555 feeds its output (amplified by Q1 and Q2) to the input of transformer T1, a reverse-connected filament transformer wit
switches Can I achieve a one shot button without a 555
A relay, which is energised by pulling the low side low using an NPN. I would like a pushbutton to operate the transistor (and therefore the relay) for a time (500ms ish) then deactivate it and wait for the next push (ignoring the button if held). I understand how I can achieve this using timers (or a MCU), but I was hoping there might be a more simple and compact solution.
pwm lamp dimmer using ne555
A simple and efficient PWM lamp dimmer using timer IC NE555 is discussed in this article. Yesterdays linear regulator based dimmerscan only attain a maximum efficiency of 50% and are far inferior when compared to the PWM based dimmers which can hit well over90% efficiency. Since less amount of power is wasted as heat, the switching elements of PWM
Touch SwitchCircuit using NE 555 IC
A touch switch circuit schematic using 555 IC.When touched on the touch plate a relay will be switched ON for a preset time. This time can be adjusted too..
The Astable-Oscillator Operating Mode in 555 Timer IC Circuit
The 555 Timer IC worked in three operating modes: monostable, astable and bistable/scmitt trigger. Here we will provide you with article of its astable mode.
555 metal detector
Variable on-off times circuit using two 555 timers
This timer uses two 555 ICs to Vary the desirable output. VR1 and VR2 are the potentiometers to change the speed of cycles.
Schematics Ultra-Long Time Delay By IC Timer 555 PCB
This be the circuit delays to have for a long time. By use the integrated circuit Timer 555 or Ultra-Long Time Delay By IC Timer 555 by R2 use for fine the frequency of pulse from the integrated circuit NE555 bring divide by wasp with 4017 each 10 in the end the time delays to follow want. Part S1 for choose Reset or Run of the circuit.
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How to make a 555 timer chip circuit - Instructables
This will be a tutorial on how to make a beginner 555 timer chip circuit to pulse a led on and off. This is a very easy circuit, all you need to know is basic electronics and how to use a breadboard.
555 Timer - Instructables
Astable Mode outputs an oscillating pulse signal/waveform. In this mode the output of the 555 timer is switching between high and low states at a tunable frequency and pulse width. Jump straight to...
The 555 Timer:Circuit Applications | electric equipment
The 555 timer is an eight-pin integrated circuit that has become one of the most popular electronic devices used in industrial electronic circuits. The reason for the 555's popularity is its tremen...
Flashing L.E.D. using 555 Timer - Instructables
I was trying to put in a video but it didn't work for me, so here is a link to YouTube http://www.youtube.com/watch?v=9rS9nFG8xdI This is a detailed instruction showing how to build a flashing L.E....
Automatic Street Light Controller Circuit Using LDR And 555 Timer IC
Automatic street light are those light which needs no manual operation to gets turn ON and turn OFF. Principle and Working of Automatic Street Light Controller.Here we use LDR to detect the presenc...
Build Your Own 555 Timer - Instructables
To Learn: Learning may be a scary thought to some people, but this project has taught me a lot about comparators and analog circuits as well as a lot of the basics of the 555 timer. The 555 timer c...
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