Teensy Breadboard

Teensy Breadboard

Combines a $16 ATmega32U4 based carrier from http://www.pjrc.com/teensy with Pololus on a solderless breadboard. Runs Teacup through integrated USB using LUFA serial at 38400 baud. (Teensy is capable of 12MBit/sec communication per [[1]]. Tested at 230400 baud with CoolTerm, and 250000 Baud with Pronterface with modified Teacup using Teensy's usb_serial* routines.) Possible upgrade path to the AT90USB1286 on a $24 Teensy++ towards Teensylu and Printrboard compatibility. Possible upgrade path to a 32 bit ARM Cortex-M4 48MHz processor on Teensy 3.0 (Was $22 on Kickstarter 2012-09-15).

Options

• The version shown above shows a couple Pololus with voltage regulators mixed with regular Pololus, a single heater output for the extruder, no endstops, and a single thermistor circuit.
• The $24 Teensy 2.0++ uses an AT90USB1286, which matches the Teensylu and Printrboard chips, which may make compiling and configuring a firmware easier. It also has lots of extra IO pins.
• The Teensy 2.0 has 25 IO pins, 12 of them can do analog input, while 7 of them do PWM output, which is more than enough for the 15 pins required for 4 steppers, 2 heaters, 2 thermistors, and 3 endstops.