Klipper Toolboard

A very small 3D printer board for use on a toolhead.

Features:

• TMC2209 driver
• ATmega168
• Two MOSFET drivers fans
• One big MOSFET driver for a hotend heater
• Thermistor input
• Servo connector

It should be fed from the mainboard with 12-24V, 3.3V or 5V, GND, UART RX and UART TX.

Possible issues:

• Is the cooling for the TMC2209 adequate?
• How well will the UART cmos/ttl level survive? Noise?
• Does it work