Tha fios agaibh
- Aug 11, 2014
- 2,252
- Joined
- Aug 11, 2014
- Messages
- 2,252
My boys RC boat quit working earlier this summer. I found and replaced a bad/unresponsive receiver board and it worked fine for a while, until the exact same thing happened again.
I then noticed a few open spots on the pcb and am thinking they omitted (to save 1c per board?) the flyback diodes next to the mosfets that forum a H bridge. Perhaps that's why these boards keep failing?
Nothing to protect ckt from inductive spikes when the motor shuts off?
What do you think, should I try buying another board and add my own blocking diodes?
I then noticed a few open spots on the pcb and am thinking they omitted (to save 1c per board?) the flyback diodes next to the mosfets that forum a H bridge. Perhaps that's why these boards keep failing?
Nothing to protect ckt from inductive spikes when the motor shuts off?
What do you think, should I try buying another board and add my own blocking diodes?