The 555 timer is one of the most popular Integrated circuit amongst hobbyists, electronics engineers and circuit designers. It's application is very wide, ranging from as an oscilator, amplifier, switch and so on. We have compiled a lists of projects which you can make with a 555 timer, they are some of the best projects for beginners, professionals, electronics engineering and those wanting to get their hands dirty with amazing projects.
555 Timer Projects lists.
1. Motion detector using NE555 timer IC.
This circuit is based on a passive infrared (PIR) sensor, which automatically switches on a device when someone comes close to it. It can be used for detection of theft or an unauthorized person entering a restricted area or building. It can also turn on lights when someone approaches the area where it is installed. Applications of this circuit include security systems, corridor lights and bathroom lights among others.
2. 555 Timer PWM audio amplifier.
The ubiquitous 555 audio pwm circuit employs the 555 IC in astable mode where, the switching frequency can be varied from 65 kHz to 188 kHz.
3. infrared remote control.
This circuit is used to switch on and off an electrical appliance using a TV remote. The signals are sensed using a sensor IC called TSOP 1738. The IC output will be high when it is not disturbed by any signal. This makes the transistor in the OFF state. If a signal with a frequency of about 38 Kilohertz falls on the IC, its output becomes low. This causes the transistor to conduct and thus sends a negative pulse to the timer IC, designed to act as a monostable multivibrator.
4. Touch free sensor.
This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly see use of infrared proximity sensors on public drinking fountains and in public washrooms. The simple circuit presented here can be operated by moving your hand in front of it. This is achieved by detecting the infrared light reflected by your hand onto a receiver device.
5. Flasher circuit using NE555 timer.
A 555 LED Flasher circuit uses an astable multivibrator which produces pulses for flashing the lamp. Two resistors are set in the circuit to control the flashing rate. A half-wave rectifier, a transistor, and a TRIAC is used to drive the load. The circuit shown in the original post had some mistakes and the modified circuit is also shown right below the original post. Also take a look at the special notes as you are testing the circuit in live, and may cause potential shock hazards.
6. Rain alarm circuit.
This circuit is used to produc oke an alarm by ringing a buzzer or speaker as soon as rain starts to pour in. The main components of the circuit are two transistors and a timer IC. A sensor is used to sense the fall of rain water and its output is given to a switch and thus to two transistors.
7. Brightness control for lamps.
This circuit helps you to reduce and increase the brightness of low power incandescent lamps. The timer IC is designed as an astable multivibrator with variable duty cycle. A transistor is also used whose input will be driven by the timer circuit. The output of the transistor drives the lamp. The duty cycle of the multivibrator can be changed with the help of a potentiometer.
8. 7 segments counter circuit.
This timer circuit is wired as an astable multivibrator to display a seven segment counter with the help of the counter IC CD 4033. This circuit is mostly added on to other circuits so as to make it more attractive by displaying a counter. The timer circuit is used to trigger the counter IC, which in turn advances each count on the seven segment LEDdisplay LT543.
9. Automatic change over switch.
The change over switch can act as an inverter. But here the DC operated load is switched from DC to AC to DC power supply in case of DC power failure.
10. Speed controller with 555 timer.
This project applies a 555 timer to control the speed of a DC motor. It can be to control the speed of a fan.
Give a comment below if you want any 555 timer project to be added.
Tags:
DIY