BC547 is one of the most common switching transistors for low to medium-voltage switching applications. The heart of this 12V Relay based Timer Switch is a BC547 NPN switching transistor. In today’s tutorial, we will design a 12V Relay based Timer Switch Circuit Using a BC547 Transistor & a small number of other components. It is generally used in controlling commercial or industrial-grade equipment such as HVAC equipment, traffic lighting, and large pumps. There are many industrial processes and tasks that would not be possible without the application of Relay based Timer Switches.Ī Relay based Timer timer switch is a process control device that starts or ends a process with respect to the preset time defined by the RC time constant of the circuit.
With the constant growth of the process control industry, the need and applications for On/Off delay timers is ever increasing.
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