Pete Lego Robot Based on PICAXE

Figure 1 

This homemade Lego PICAXE Pete robot is based on line sensor which utilizes up of a homemade PICAXE-board with an L293 driver chip and light dependent resistors (LDRs).

The PICAXE basic will be used as the programming language of the device while the LDRs are responsible for the input and sensor devices. The chips and line sensor are regulated by the LM7805 voltage regulator which is made up of bulk capacitors. The power source comes from two Li-Ion 7.2V battery packs that is connected in series. The actuators and output devices with 12V are used to power the mini motors of the two Lego by giving out 9V. The main CPU of the system is based on PICAXE 40X1.

The engine block and the tail section are the two main parts for this PICAXE Pete. They are required to be assembled together along with the batteries and the controller board. In order to program the PICAXE chip, the PICAXE board contains a way of connecting the programmer cable to the board. For handling the rotation sensors, interrupts and timers can be used. The NXT motors are easier to interface by having encoders.

Rest of the project