Next, how to add an additional layer of protection with the use of optocoupler and transistor to protect driver circuit from noise and spikes.
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Next, how to add an additional layer of protection with the use of optocoupler and transistor to protect driver circuit from noise and spikes.
In nutshell you connect secondary side of optocoupler to gate of the relay, then you use first side of the optocoupler to drive secondary side. (which is now connected to gate of relay)