555 Timer Circuits (131)

Browse through a total of 131 555 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  

Building a DIY LED Ring for DSLR Camera

Enrico Miglino - 11/06/17

LED Ring for a DSLR Camera For me, when I start a new project, I am not interested [...]

Wireless Remote Camera Flash Trigger

T.K. Hareendran - 07/25/16

Here is an efficient and economical circuit for a wireless remote camera flash trigger, useful for capturing scenes [...]
water pump guard schematic

Air Cooler Water Pump Guard

T.K. Hareendran - 07/17/16

Compact, submersible water pumps are mostly used on air coolers, aquariums, and fountains. If the pump runs out [...]
555 flood alarm

Basement Flood Alarm Circuit

T.K. Hareendran - 06/11/16

Even though floods don't always rate high on our list of concerns, if we get an early warning [...]
555 Propagation Delay Oscillator Schematic

555 Propagation Delay Oscillator

Jim Keith - 01/19/16

With no external components, a 555 can be turned into an oscillator that runs typically in the range [...]
555 Schmitt Trigger Logic Inverter Level Translator

Versatile 555 Schmitt Trigger /Logic Inverter /Level Translator

Jim Keith - 12/13/15

More undocumented applications for the 555 ‘oscillator:’ Not all applications oscillate as we will see. Most are knowledgeable [...]
smart switch circuit

Smart Switch for Model Aircraft Lights

T.K. Hareendran - 11/02/15

The Smart Switch for Model Aircraft Lights is a simple yet efficient ambient light sensing electronic switch designed [...]
power surge protection circuit

Power-Back Surge Protection Circuit

T.K. Hareendran - 10/11/15

Power-Back Surge Protector is a simple yet effective solution for protecting your valuable and sensitive electric/electronic systems. Power-Back [...]
sound processor circuit

Simple Sound Processor Circuit

T.K. Hareendran - 10/06/15

Simple Sound Processor presented here is an ultra-simple circuit module suitable for almost all basic electronics and microcontroller [...]
rgb led circuit

Layman’s RGB LED Module Circuit

T.K. Hareendran - 09/06/15

Layman’s RGB LED module is an ultra-simple project realized without any microcontrollers. An RGB LED can be driven [...]
555 dual timer

555 IC Tutorial & Circuits

Terence Thomas - 08/29/15

The 555 timer IC has been around now for quite some time and the list of potential uses [...]
LED Display Brightness Controller Circuit

LED Display Brightness Controller Circuit

T.K. Hareendran - 05/23/15

Even if you are designing a microcontroller-based LED display system, often it may calls for a manual option [...]
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