So the PICAXE 40X2 is looking pretty good, but you want something that’ll work with lower voltage. Well here you go – this chip is nearly identical to the 40X2, but is based on the 18F45K20 and operates from 1.8V to 3.6V.

Specifications

• Up to 4 internal program slots and 32 external program slots
• Increased RAM, up to 256 bytes + 1024 bytes scratchpad
• Increased operating speed, up to 40MHz
• Individual pin input/output control
• 0-8 ADC pins available
• 1.8V to 3.6V volt operation
• 1000 lines memory
• 22 Configurable I/O
• Hardware I2C support for easy peripheral connecting
• Internal Timer
• Increased variables and separate memory scratchpad
• Enhanced mathematical functions
• Line-by-line simulation
• Supports:
  • Interrupts
  • 12-Bit Digital temperature sensors
  • Servo control
  • Keyboard input
  • IR transmit/receive
  • Plays user-defined musical tones
  • PWM Motor control
  • Input Pulse counting
  • Serial output & debugging via programming cable
  • Higher baud rate for serial work
• Based on the PIC 18F45K20 IC

The ‘PICAXE’ system is a powerful, low cost microcontroller programming system designed to simplify educational and hobbyist use of microcontrollers. PICAXE chips can be programmed in a graphical flow-chart environment or in easy to understand BASIC.

Resources

• PICAXE Manual Part 1 – Getting Started (.pdf)
• PICAXE Manual Part 2 – BASIC Commands (.pdf)
• PICAXE Manual Part 3 – Interfacing Circuits (.pdf)
• Programming Editor (.exe)

PICAXE is a trademark of Revolution Education.