4.0e June 22, 2010 ================================ - Added. Ripple filter on the switching supply's output. Decoupling capacitor near the PIC has been increased to 10uF. This has prooven to significantly stabilize the sensor readings while the board is powered via an adaptor or battery. - Added. A 5.1V Zener diode which acts as a TVS (Transient Voltage supression). This will remove hunge spikes in the power line and make the components (including the PC's USB port) safer from being fried. - Added. A 100uF capacitor near the USB port to help reduce power fluctuations when driving motors. Such event is known to reset the USB connection causing the user to have to re-connect. - Added. Screw holes for the battery packs. Screwed-in packs are more stable than hot-glued ones. - Added. Power solder points for two battery packs. The gogoboard uses two 3xAA battery packs and they previously needed to be wired together. Now there are soldering points for both the packs. This should reduce the cabling mess in previous versions. - Changed. The ground traces from the motor ports are better separated from the digital ground. - Changed. The PCB is better labeled. Run button and user LED are clearly marked. I2C Bus pins are labeled. Power jumper settings are labeled. - Changed. Diode D1 near the power plug has been moved slightly preventing it from accidently being soldered to the plug cuasing a short curcuit.