Enhanced H Bridge

The H-Bridge that failed has been enhanced with a set of IRLR7843PBF from Mouser. The same will be done for the spare bridge. These are not only better parts, they are from one lot, one date-code and a trusted distributor. See Suspect Parts. The original LR2905 had an RDS(on) od 27 mΩ with a current rating of 42 A. The IRLR7843PBF is 3.3 mΩ and 161 Amps, respectively—and nearly 4 × the pulse current. While those values can't be achieved with the PCB layout of the Wangxin DBH 01, it should be safe for the next race.