Protect Against Flyback Spikes
Add a diode so coils don't damage your board.
Coils Store Energy
Motors and relays contain a coil of wire. While current flows, that coil quietly stores energy in a magnetic field around it. 🧲
The Sudden Cutoff
When you switch the coil off, that stored energy has nowhere to go. The collapsing field forces a huge voltage spike in the opposite direction.
All lessons in this course
- Why You Need a Driver
- Speed & Direction with an H-Bridge
- Switch Mains Devices with a Relay
- Protect Against Flyback Spikes