Here we had compiled a list of 10 Electronics mini projects using IC 555 that would be cool, useful and efficient to design in free time. Before listing the top ten electronics mini projects using IC 555 we would like to clear some point like operating voltage, temperature, applications etc. of timer IC.
So, what is timer IC 555?
Timer IC 555 is powerful timing circuit which is popular for production of accurate and stable time delay or oscillation. It is much reliable, easy to use and available in three different packages i.e. metal can package, 8-pin DIP and 14-pin DIP. The timer IC 555 can only operate in two different mode i.e. monostable (one-shot) mode and astable (free-running) mode.
Electrical Parameter of Timer IC 555
|Operating Voltage||+5V to +18V DC|
|Operating Temperature||-550C to 1250C (SE model i.e. SE555)
00C to 700C (NE model i.e. NE555)
|Maximum Power Dissipation||600 mW|
|Sourcing Load Current||200 mA|
Application of Timer IC 555
Monostable and Astable multivibrator, DC to DC converters, Digital Logic Probe, waveform generators, frequency meter, measurement and control system, voltage regulator etc.
Now, let’s take a look on Top 10 Electronics mini projects using IC 555
Sound Activated 0-30 Minutes Timer Circuit
The project “Sound Activated 0-30 Minutes Timer Circuit” is a simple project designed using timer IC 555 and LM324 Quad op-amp IC. By using this project, one can activate or de-activate the appliance using sound and time delay can be adjusted from few seconds to 30 minutes. The applications of project is: Used as sound activated burglar alarm. Used as timer circuit in kitchen, house. used for appliance operation like refrigerator, TV, Rice-cooker etc. by adjusting the time as per required.
This Project is available at: Sound Activated 0-30 Minutes Timer Circuit
IC 555 Based Automatic evening lamp
The project “IC 555 based Automatic Evening Lamp” is a simple and built around timer IC 555 and LDR. The bulb used in the circuit is turn on automatically in low light (evening) and turn off in morning. Various other automatic night lamp circuit is already posted in betsengineeringprojects.com. Some are listed here, Automatic Night Lamp Circuit using TRIAC and SCR, Automatic night lamp using 7486 IC. The circuit posted here is standalone automatic evening lamp; simply you have to connect to mains supply and place where you want to use it.
This Project is available at: IC 555 Based Automatic evening lamp
DIY Opto Reflector Sensor using 555
The DIY project posted here is of opto reflector sensor using NE555 and TCRT5000 module. These days opto reflector sensor is used in various project like proximity sensing, position detector, robotics etc. Thus, we had posted a DIY project with working range of 2mm to 10mm. The module used here is TCRT5000 which have an infrared LED and a photo transistor fabricated internally. The main advantage of using this module is its high-sensitivity and both analog and digital output.
This Project is available at: DIY Opto Reflector Sensor using 555
Auto Cut Circuit for Over and Under Voltage
The project “Auto Cut Circuit for Over and Under Voltage” is designed to protect electrical and electronics device from over and under voltage which ensure long lifespan of these device. An “Auto Cut Circuit for Over and Under Voltage” have been presented here serving multiple purpose security; under voltage protection, over voltage protection, auto reset, auto cut off and regulation.
This Project is available at: Auto Cut Circuit for Over and Under Voltage
RJ45 Cable Tester Circuit
In the field of networking, RJ45 is the most common cable used. This cable consists of multiple wires clamped within a single plastic tube and in such a case, there is high probability that project implementing RJ45 will not work efficiently. Rather than isolating the entire circuit to check the fault, it is considered wiser to test the RJ45 cable which causes failure most of the times. And, here is the tester circuit which is used test RJ45 cable either in straight-through or crossover-type.
This Project is available at: RJ45 Cable Tester Circuit
Servo Motor Tester Circuit Using 555 IC
I believe testing circuits are a must for project geeks since these testers save so much of time in debugging circuits. People invest all their efforts and spend so much of time to complete one project but most of the time they don’t get the desired output. There can be multiple reasons behind this and generally it is because the components like servo motors are at fault.
This Project is available at: Servo Motor Tester Circuit Using 555 IC
DIY Hearing Aid Circuit using 555
General circuit of Hearing Aid available over internet used normal transistorize circuit thus it consumes more power. So, here we are concentrated to design a circuit which consumes less power. For that the circuit present here of DIY Hearing Aid Using 555 have automatic triggering mode which consumes 96 mA at the time of amplifier trigger or you can say when sound is detected else it consumes only 6 mA which is very less. Other than less power consumption the circuit have advantage like user can select sensitivity as well as amplifier ‘on’ time duration.
This Project is available at: DIY Hearing Aid Circuit using 555
Fire Alarm Using Thermistor and NE555
If we search for fire alarm circuits on internet, we can find a long list of such circuits. Most of those circuits are quite expensive and also the components may not be easily available. So, here we have presented a simple and inexpensive project of ‘fire alarm using thermistor’. Where thermistor is the main component and is used as temperature sensor of fire alarm. Talking about the working principle of thermistor, it works in the same way a normal LDR would work i.e. change resistance with change in heat where as LDR change resistance with change in the amount of light falling on it.
This Project is available at: Fire Alarm Using Thermistor and NE555
Automatic Plant Watering System Circuit
If you are one of those people who would like to spend their well-earned summer vacations in the comforts of a hill resort but worried about your potted companions back home, then a plant watering system is what you need. This circuit immediately waters the plant once the soil turns dry. By adding timer circuits and other components, we can extend the flexibility of this project and make further improvements such that it operates automatically at duration set by timer.
This Project is available at: Automatic Plant Watering System Circuit
High-Brightness LED Strobe Using IC 555
Here is one another project which is useful in our daily life using the most popular IC NE555. The project high-brightness LED strobe uses an array of 36 high-brightness LEDs. The advantage of project is it is small battery powered and very efficient. A variable resistor on the side allows the frequencies of the flashing to be varied.
This Project is available at: High-Brightness LED Strobe Using IC 555