555 Timer Circuits
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The following schematic has been taken from buildcircuit. com. The following circuit can work as a music generator, Infrared transmitter and LED blinker depending upon the values of R1, R2 and C1. Making a minor modification in the previous circuit makes it.... -
Here`s a simple light activated police siren using light dependent resistor and NE555 timer. Before you make this project, I would recommend you to make the following projects. The 555 timer with R1=68K(say timer1) is configured in slow astable mode and the.... -
The following circuit works as a toggle switch. The circuit has two stable states, ON and OFF. Once it is ON, it remains ON till you press the switch again. The project has been derived from buildcircuit. com. In all MINIBREAD projects, we have used the.... -
I learned that you could do PWM with the 555 chip. So I tested this idea. I will not attempt to explain the workings of the 555 chip because I found the page by Tony van Roon to be an excellent introduction to the 555 chip. Tony`s page discusses a slightly.... -
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two ""1 of 8 line decoders"" (74HC138 or 74HCT138) to generate the popular ""Night Rider"" display. A Schmitt Trigger oscillator provides the clock signal for the counter and the.... -
This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN medium power transistor which also provides more current than can be obtained.... -
This 555 timer circuit toggles a relay when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors. When the output is high, the capacitor charges through the 100K resistor, and.... -
Here is a schematic of a simple 555 organ circuit. The circuit is consist of two parts first 555 circuit of organ and second lm386 amplifier for driving 8 ohms speaker. The circuit will generate slightly different tone by pressing each switch from S1 to S7.... -
A project of a 555 tester circuit, the circuit will start blinking LEDs when power is applied which will indicate that the IC is working correctly.... -
The schematic shown below is a 555 timer circuit. NE555 is a famous IC comes in 8 pin dip plastic package. There is a huge list of 555 IC circuits due to which this IC is very popular among electronics hobbiests, students and experimenters. The circuit.... -
This is a 555 tone generator circuit based on NE555 timer IC. NE555 is a very famous IC used in many circuits and performs variety of tasks. In this circuit the IC is used as an astable oscillator and the circuit will generte a tone when power is applied..... -
The schematic shown here is a circuit of a 555 tracking transmitter. 555 is a famous versatile IC used in many electronic projects. In the below mentioned circuit this IC is used to generate a tone which will be transmitted through the FM transmitter circuit.... -
This simple DC motor control or PWM circuit using 555 IC can be used to control the speed of a DC motor. The circuit is very simple and can be built in very short time if all parts are available with you.... -
Here is a circuit of a LED sequencer / chaser using CD 4017 and NE555 IC. CD 4017 is a CMOS counter IC consist of 16 pins. This IC gives 10 outputs according to the clock pulse it receives from the clock input, which is pin 14. The another IC used in this.... -
A Thermistor is used in the circuit for sensing the heat and two 5K variable resistors are used to adjust the circuit to activate the relay on the desired temperature. The purpose of using the 1N4007 diode across the relay is to limit the back EMF of the.... -
You can use this water level alarm circuit anywhere as a water level indicator to detect the desired level of water for example in tanks, swimming pools or at any place where you store water. The circuit is build around a 555 timer IC which is a famous and.... -
Servos became valuable products for any variety of plans, like robotics, automation or only remotely controlling some thing, for example model vehicle steering. They`re reasonably low-priced and also simple to have hold of, however controlling them can be a.... -
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 circuit described here counts the number of times that an infrared beam is interrupted. It could be used to count the number of people entering a room, for instance, or how often a ball or another object passes through an opening (handy for playing.... -
The following method allows the timer to be triggered by a normally closed switch. This would be useful in applications such as intrusion alarms where the protection circuit is broken if a window or door is opened Trigger Input Control Of 555 Timers .. -
Here the simple file alarm circuit based timer ID NE555. The works is simple, the lamp give light to the LDR (Light Depending Resistor) as light sensor. When the light from the lamp covered with smoke then the LDR will change its resistance value and then.... -
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.... -
The circuit diagram shows a timer 555 based rain sound generator. The circuit requires a 9V dc power supply and can be fed from a 9V battery. The loud speaker for producing sound is of 0. 5W 8ohm speaker. The circuit will readily generate a rain like sound.... -
Circuit The picture shows the circuit diagram of a rotation sensor that can turn on a device like motor or buzzer while the circuit assembly rotates. The circuit is based on basic 555 timer operation. .. -
This post shares a proximity detector circuit comprising mainly NE555 IC. This circuit can be used for burglar alarms based on beam interruption, with the added advantage that the transmitter and receiver are housed in the same enclosure, avoiding any wiring.... -
This timer uses two 555 ICs to Vary the desirable output. VR1 and VR2 are the potentiometers to change the speed of cycles... -
This project shows you how to build simple flashing light based on IC 555. The 555 has function as clock generator with dutycyle less than 100 and more than 50. The other components are Voltage regulator, 3 power amber LED and passive component like resistor....
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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.....
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