relay - Electronics Area https://electronicsarea.com Electrical and Electronics Tutorials and Circuits Thu, 26 Dec 2024 15:51:34 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.26 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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The post ON-OFF Switch circuit using a 555 timer (PCB) appeared first on Electronics Area.

]]> https://electronicsarea.com/on-off-switch-circuit-using-555-timer/feed/ 4 Shadow detector alarm circuit with two LDRs https://electronicsarea.com/shadow-detector-alarm-circuit-with-two-ldrs/ https://electronicsarea.com/shadow-detector-alarm-circuit-with-two-ldrs/#respond Sun, 30 Aug 2020 17:08:32 +0000 http://electronicsarea.com/?p=1351 Shadow detector alarm circuit with two LDRs

This circuit detects if there is a difference of lighting between two LDRs, and sends an audible and visual warning. Circuits that use two LDRs are more reliable than those that use only one.

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