There is no need to build special interfacing circuits to run with 3V parts like GPS or XBee modules - simply run the PICAXE at 3V as well. Most people generally use 4.5V from a 3xAA cell battery pack. PICAXE Power SupplyĪll the latest (M2 and X2) PICAXE parts can be run at 3V, 4.5V or 5V. A floating serial in pin will result in unreliable operation and is inviting trouble!Ģ8 and 40 pin chips also have a 'reset' pin, which should also not be left floating (use a 4k7 or 10k resistor to V+). The 'serial in' download pin is shown in the pinout diagrams above (e.g. This converter module has options for different output voltage options which are set by the jumper on the board. Never, ever, leave the serial input pin of the PICAXE chip floating (unconnected). The FT232RL USB to TTL 3.3V/5V FTDI Serial Adapter Module is a popular module that is used to connect a TTL serial communicating device to a PC via a USB mini port. The download circuit for connecting the AXE027 USB cable is the same for all PICAXE chips: The following pinout diagrams are taken from the PICAXE manual, which has more detailed information about the many features of the PICAXE chips.Ĭlick on the PICAXE chip name to see it's pinout diagram:
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