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Driving Relay with 555 IC (NE555)

2015-02-02 02:03  
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This article describes the Driving Relay with 555 IC (NE555). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:NE555.

This is a Driving Relay circuit using 555 IC. The circuit is used to drive a relay to avoid 555 hangs up, it uses an inductive feedback. The coil is prevented to drive Pin 3 below a negative 0.6V by a clamp diode that across the coil. However, in some case, this negative voltage maybe cause the timer to malfunction. We can solve this problem by driving the relay through a dioda. So, pin 3 will never receives a negative voltage. Here is the circuit :


Driving Relay with 555IC circuit schematic diagram



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