Relay based controls Archives - Instrumentation Tech

Alarm annunciator circuit

This article describes the design and working of a simple hardwired alarm annunciator circuit . What is alarm annunciator Alarm annunciator is a warning and…

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16 February 2023

SPST ,SPDT, DPDT…… Switches/Relay classification

SPST SPDT DPST DPDT SWITCHING What is SPDTswitch! What is SPDT relay? DPDT,3PDT,3PST........ What are they? Heard about this ?.. SPDT .....single pole double throw…

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30 October 2022

Control Concepts / Relay based controls / Uncategorized

Potential free contact

What is potential free contact ? Is there such a thing? A contact in a electrical or electronic circuit allows or blocks passage of power…

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9 October 2022