What type of coil inside the squencer?

The type of coil commonly found inside a sequencer is typically an electromagnetic coil, often referred to as a relay coil. This coil is used to control the opening and closing of electrical circuits within the sequencer, enabling it to sequence signals or trigger events. In digital sequencers, you may also find inductive components in the form of inductors or Transformers, which help manage signal processing and power distribution.