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  • 127 x 555 Timer Circuits

    Browse through a total of 127 555 timer circuits and projects including the timer’s datasheet. There are simple circuits for beginners and advanced engineers.

    555 datasheet   555 duty cycle   555 metronome   555 reset function   555 time delay relay   inverted 555 timer   pulse generator  

    555 Propagation Delay Oscillator With no external components, a 555 can be turned into an oscillator that runs typically in the range of 1 to 2.5mHZ –or who needs a timing capacitor? It is essentially a stripped down version of the ring oscillator. While useful applications may be limited, it makes a great experiment to further enhance both one’s knowledge of the venerable...
    Versatile 555 Schmitt Trigger /Logic Inverter /Level Translator More undocumented applications for the 555 ‘oscillator:’ Not all applications oscillate as we will see. Most are knowledgeable about common CMOS logic inverters and Schmitt triggers such as the 74HC04 and 74HC14 respectively that come six in a DIP-14 package. Often, some sections are left over and can be used for future enhancements, etc. However, what do you do...
    Smart Switch for Model Aircraft Lights The Smart Switch for Model Aircraft Lights is a simple yet efficient ambient light sensing electronic switch designed to be user programmable over a wide range from full sunlight to total darkness including an always on setting option. Infact, the switch is an improved version of the predominately exploited conventional automatic twilight (dusk-to-dawn controller) switch circuitry. The built-in light...
    Power-Back Surge Protection Circuit Power-Back Surge Protector is a simple yet effective solution for protecting your valuable and sensitive electric/electronic systems. Power-Back Surge typically occurs when power returns after a power-cut (black out) and connected equipments receives a surge of electricity at an over-voltage level, which can be very damaging. Usually, power-back surges are created by the utility, when it restores supply at...
    Simple Sound Processor Circuit Simple Sound Processor presented here is an ultra-simple circuit module suitable for almost all basic electronics and microcontroller projects. For example, this module can be used as a front-end in an electronics project to detect and process ambient sound in an efficient manner. Even less-experienced hobbyists will find the construction of the circuit on a general purpose printed circuit...
    Layman’s RGB LED Module Circuit Layman’s RGB LED module is an ultra-simple project realized without any microcontrollers. An RGB LED can be driven with a cmos presettable up/down counter. This is accomplished by connecting the three source outputs (Q1 to Q3) from a CD4029 cmos chip and configuring the device as a presettable counter. The solution presented here is intended to drive red, green,...
    555 IC Tutorial & Circuits The 555 timer IC has been around now for quite some time and the list of potential uses for this device appears to be endless. This article contains a few examples of circuits that you might incorporate in your next design. OPERATION Before we review the circuits though, lets take a look at the basic anatomy of the timer....
    LED Display Brightness Controller Circuit Even if you are designing a microcontroller-based LED display system, often it may calls for a manual option to control brightness of the LED display unit. On the otherhand, if it is based on discrete components, such an option is a crucial requirement. Here is an economical solution for such situations. The visible brightness of an LED display can...
    Automatic Hand Dryer Circuit Now and again ardent hobbyists looking to add something special and individual to their rest room/bathroom want an automatic hand-dryer. This design guide exhibits that you need barely anything more than a handful of inexpensive components and the right enclosure. Here is how to build a versatile hand-warmer at a low cost! Before you start the construction, make sure...
    Edge-Triggered 555 Monostable Multivibrator While the 555 oscillator IC is a very versatile device, it can also be quite tricky and solutions are not always obvious. Such is the case with this edge-triggered 555 monostable circuit. By differentiating the trigger signal, the monostable multivibrator times out normally regardless of the trigger signal length. 555 Schematic 555 datasheet More than a capacitor The classic...