To drive all 6 engines of the same H-bridge is not recommended, it tends to get hot, pretty hot. I was thinking of make a extension card with three H-bridges on it, but then I’d have some weight issues with my bot, it has to weigh less then 500g. The solution was to build a new PCP with htree H-bridges.
Because I never have created a PCB before I was a little bit unsure of how to do it and if I would do any errors. But I’d much help from folks at CRF and it turned out to be a win!
All my resistors and LED’s is surface-mounted so I was a little bit worried that I would have problems while solder. I then watched “Surface Mount Soldering 101″ from CuriousInventor.com and started solder, it turned out to be very easy.