Flyback Diode Wiring. Flyback diodes provide a path for current to flow once the dc source is removed from an inductor and its magnetic field collapses causing huge voltage spikes across the inductor. To protect the switch from being damaged due voltage spikes or inductive flyback a flyback diode or a freewheeling diode is used.
Bypass diode p 7. Flyback diode wiring in a relay circuit. The waveform in figure 2 is much less bouncy than the waveform in figure 1.
In this schematic the resistor r in parallel with the flyback diode wiring represents the coil s intrinsic dc resistance.
Bypass diode p 7. Snubber diode p 5 secondary side rectifier diode. Instead of spiking to 300 v the flyback diode only allows approximately 1 4 v of potential to be built up 1 4 v is a combination of the forward bias of the 1n4007 diode 1 1 v and the foot of wiring separating the diode and the solenoid dubious discuss. The flyback diode makes inductor to draw current from itself in a loop until the energy is dissipated in diode and wires.
