This simple circuit is like a one-bulb version ... the others stay lit. So, parallel circuits are really useful when you want your devices to keep working when one breaks or is removed.

Impulse relay turns on with an electrical impulse at the control input and turns off again with another impulse.

However, this is a great time to look at the difference between series and parallel circuits. A Simple Circuit Just about the simplest circuit you can create uses just one battery and one light bulb.

This approach can provide more acoustic output than the parallel ... on resonant circuits. Instead, it demonstrates a procedure by which any resonant piezoelectric transducer or buzzer can be driven ...