Picaxe chips picaxe picaxe 28x1 picaxe chip picaxe family 4v to 55v supply voltage 128bytes flash memory 22 io pins 4 adc channels 2 pwm channels 16mhz clock speed i2c interfaces 28 dip case advanced level picaxe chip program memory 600 line separate data memory interrupts infra red receive support sor digital temperature sensor control of radio control servos keyboard input i2c interface for linking to external eeproms and other devices 810 bit adc 12 bit temperature r