555 Timer Circuits - Electronics Area https://electronicsarea.com Electrical and Electronics Tutorials and Circuits Wed, 02 Jul 2025 22:53:33 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.26 Perfect Square Wave with 555 – Formula – Examples https://electronicsarea.com/perfect-square-wave-with-555-formula-examples/ https://electronicsarea.com/perfect-square-wave-with-555-formula-examples/#respond Tue, 24 Oct 2023 18:06:12 +0000 https://electronicsarea.com/?p=8234 Perfect Square Wave with 555 - A simple circuit that uses the 555 timer to produce a stable perfect square wave. Formula, examples.

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]]> https://electronicsarea.com/perfect-square-wave-with-555-formula-examples/feed/ 0 Off-Delay Timer Circuit using 555 IC https://electronicsarea.com/off-delay-timer-circuit-555/ https://electronicsarea.com/off-delay-timer-circuit-555/#respond Thu, 20 Jul 2023 15:50:32 +0000 https://electronicsarea.com/?p=8210 This off-delay timer is ideal when we want to schedule the automatic shutdown of a device after a predetermined time, using the well known 555 IC

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]]> https://electronicsarea.com/off-delay-timer-circuit-555/feed/ 0 High current pulse generator https://electronicsarea.com/high-current-555-pulse-generator-voltage-regulator/ https://electronicsarea.com/high-current-555-pulse-generator-voltage-regulator/#respond Tue, 11 Jul 2023 16:15:51 +0000 https://electronicsarea.com/?p=6293 High current pulse generator using a 555 timer and a voltage regulator. This circuit can be useful for DC Motor control. Light control, etc.

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The post High current pulse generator appeared first on Electronics Area.

]]> https://electronicsarea.com/high-current-555-pulse-generator-voltage-regulator/feed/ 0 5 to 30 Minute Timer Circuit using 7555 IC https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/ https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/#comments Tue, 25 Apr 2023 15:03:01 +0000 http://electronicsarea.com/?p=2313 This 5 to 30-minute timer circuit achieves times ranging from 5–30 minutes using the 7555 integrated circuit (CMOS version of the popular 555 timer).

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The post 5 to 30 Minute Timer Circuit using 7555 IC appeared first on Electronics Area.

]]> https://electronicsarea.com/5-to-30-minute-timer-circuit-7555/feed/ 2 Electronic Doorbell Circuit using a 555 and CD4017 https://electronicsarea.com/electronic-doorbell-circuit-555-4017/ https://electronicsarea.com/electronic-doorbell-circuit-555-4017/#respond Sat, 30 Jan 2021 15:24:06 +0000 http://electronicsarea.com/?p=1929 Electronic Doorbell circuit that lets know that someone is at the door. Made with 555 timer and 4017 decade counter allowing to change the tone of each note

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The post Electronic Doorbell Circuit using a 555 and CD4017 appeared first on Electronics Area.

]]> https://electronicsarea.com/electronic-doorbell-circuit-555-4017/feed/ 0 Long Duration Timer with NOR Gates (CD4001) https://electronicsarea.com/long-duration-timer-nor-gates/ https://electronicsarea.com/long-duration-timer-nor-gates/#respond Sun, 27 Dec 2020 23:18:59 +0000 https://electronicsarea.com/?p=6514 Long duration timer or long delay time with NOR gates. This very simple circuit allows us to turn off the TV or radio in the event that we fall asleep

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The post Long Duration Timer with NOR Gates (CD4001) appeared first on Electronics Area.

]]> https://electronicsarea.com/long-duration-timer-nor-gates/feed/ 0 ON-OFF Switch circuit using a 555 timer (PCB) https://electronicsarea.com/on-off-switch-circuit-using-555-timer/ https://electronicsarea.com/on-off-switch-circuit-using-555-timer/#comments Fri, 04 Dec 2020 16:55:49 +0000 http://electronicsarea.com/?p=1685 This circuit has many applications on places where it is necessary to activate and deactivate (connect and disconnect) an electrical or electronic device.

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]]> https://electronicsarea.com/on-off-switch-circuit-using-555-timer/feed/ 4 Automatic Night Light with 555 and relay https://electronicsarea.com/automatic-night-light-using-555-relay/ https://electronicsarea.com/automatic-night-light-using-555-relay/#respond Mon, 11 May 2020 15:05:45 +0000 http://electronicsarea.com/?p=2974 This automatic night light using 555 IC turns on lights when there is no daylight. The circuit is perfect for lighting single places such as the garden, the front door of the house, the entrance to the garage, etc.

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]]> https://electronicsarea.com/automatic-night-light-using-555-relay/feed/ 0 Sound Activated Flash trigger using 555 and LM386 https://electronicsarea.com/sound-activated-flash-using-555-and-lm386/ https://electronicsarea.com/sound-activated-flash-using-555-and-lm386/#respond Sat, 15 Feb 2020 15:20:34 +0000 http://electronicsarea.com/?p=2810 With this sound activated flash circuit, you can achieve incredible pictures of the most unexpected moments. Pictures like a water balloon that just burst and the water still floats in the air, or when an object of any type explodes.

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]]> https://electronicsarea.com/sound-activated-flash-using-555-and-lm386/feed/ 0 Missing pulse detector circuit using the 555 timer https://electronicsarea.com/missing-pulse-detector-circuit-555-timer/ https://electronicsarea.com/missing-pulse-detector-circuit-555-timer/#respond Thu, 06 Feb 2020 17:19:21 +0000 http://electronicsarea.com/?p=1489 This circuit is very interesting because it can detect or warn of the absence or delay of an expected pulse, which under normal conditions should be received at predefined intervals.

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