Im putting together a budget to equip several teams for the FIRST LEGO League tournament in the fall. What should I budget for batteries?
You’ll need AA batteries and perhaps 9 volt batteries. The RCX programmable bricks take 6 AA batteries. They seem to last 6 to 20 hours of running time depending on the load, etc. The LEGO software has a feature that allows you to check the battery level of the RCX. The RCX also shows a low-battery icon when the batteries are almost dead. Some of the RCX bricks take an optional AC adapter, which could reduce or eliminate the need for AA batteries. I haven’t purchased the adapter because stringing a cord to the robot would get in the way in most cases. There are two versions of the intrared transmitter that is used to send the programs from a PC to the RCX: serial and USB. The main difference between these two transmitters is how they are plugged into a PC. The serial infrared transmitter takes a 9-volt battery while the USB version of the transmitter does not require a battery. (Mindstorms Robotics Inventions System 2.0 comes with the USB version of the transmitter.) The 9-volt batteri
You’ll need AA batteries and perhaps 9 volt batteries. The RCX programmable bricks take 6 AA batteries. They seem to last 6 to 20 hours of running time depending on the load, etc. The LEGO software has a feature that allows you to check the battery level of the RCX. The RCX also shows a low-battery icon when the batteries are almost dead. Some of the RCX bricks take an optional AC adapter, which could reduce or eliminate the need for AA batteries. We haven’t purchased the adapter because stringing a cord to the robot would get in the way in most cases. There are two versions of the intrared transmitter that is used to send the programs from a PC to the RCX: serial and USB. The main difference between these two transmitters is how they are plugged into a PC. The serial infrared transmitter takes a 9-volt battery while the USB version of the transmitter does not require a battery. (Mindstorms Robotics Inventions System 2.0 comes with the USB version of the transmitter.) The 9-volt batter
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