The attached PDF PICaxe 18X0-5 give a basic MiniSumo control circuit using the PICaxe18X. It does not include the motor, sensor or battery elements but does include the support circuitry for attaching these components.

The board features:-

The motor control has a jumper for motor enable to facilitate desktop testing with motor disabled. Normal 18X configuration give 4 spare inputs (2 ADC or digital + 2 Digital only) and two outputs, PEEK/POKE configuration of the registers to allow the outputs to be configured as additional ADC or Digital inputs. The page on Reconfiguring PICaxe IO gives sample code using the PEEK/POKE commands for the conversion of Outputs.

The I/O connections are configured to give +5v/Signal/0V jumper connections to the sensors, these could be used with the digital I/O as inputs for software options (not recommend on PEEK/POKE converted outputs due to the risk of short circuit damage).

PCB mask (formulaV06 bmp file above) and component overlay (formulaV05OL bmp file above) are printed 1:1 at 400 DPI, the overlay is marked up below to show the features.

The inputs of the board have been socketed in build pictured, the budget build used portions of a cut down IC socket. The PICaxe18X and motor driver chip have been omitted in this picture.

A de-coupling capacitor has been added to the under side of the PCB between the 0V and 5V pins of the PICaxe socket. This will be added to the next version of the PCB and circuit.

Supporting sensor circuits and example software will be detailed separately.

V0.05 - First published

V0.06 - Minor change to 0V routing