The circuit below works fine as long as there are two power supplies, one for the micro controller and one for the relay.
However, I would like to use a single 5v power supply for the pic controller and the relay. I need a snubber circuit so that the controller does not hang due to emi generated from the relay. I need a snubber circuit. Load on the relay is 230V, 30Watts.
The circuit below works fine as long as there are two power supplies, one for the micro controller and one for the relay.
However, I would like to use a single 5v power supply for the pic controller and the relay. I need a snubber circuit so that the controller does not hang due to emi generated from the relay. I need a snubber circuit. Load on the relay is 230V, 30Watts.
You can buy ready made snubbers, 100R and 100nf cap in the same package.
These are normally placed close to the switching contacts to prevent arcing when switching inductive loads.
Its also a good idea to place a snubber close the inductive load.
The point to remember about switching incandescent lamps is that the filament resistance when the lamp is cold can be only 10% of the hot running tempr, so the inrush current can be high.