Shared Projects by zeroflow

Z125M driver for a 4x Nichia Optisolis Emisar D4 mod

Stepstick-Breakout for the MKS sBase for upgrading the drivers

• VMOT: XT30 plug which can be chained to more boards
• Input Connectors: [E]nable, [S]tep, [D]ir, [Ground]
• Output Connectors: Same order as on the StepSticks
• VIO: Supply with you board’s IO Voltage (5V on RAMPS, 3.3V on MKS sBase, …)
• Capacitors between Motors: Just install what you think is right. 10µF 35V works for me. + and GND are marked.
• Inside each StepStick there are solder jumpers for MS1..3. Top row is VIO, middle row is MSx and bottom is GND.
• The unmarked pins between input (ESDG) and the StepStick are also the MS1..3 pins if you want to have a SPI bus for the TMC2130 drivers or use UART for TMC2208

BOM

All SMD Parts in 0805

• U1: Atmel ATTINY84-20SSU
• U2: STm KF50BDT-TR (5V LDO, DPAK)
• Q1: SOT-23 NPN Transistor (BCX70G)
• Q2: SOT-23 P-Channel MOSFET (NTR4171PT1G)
• R1 & R2: Battery voltage divider (100k & 68k for 12V)
• R3: 10k Reset Pull-Up
• R4 & R7: 10k Pulldowns for output Stage
• R5: 100Ω current limiting
• R6: 10k PullUp for Mosfet
• C*: Ceramic Cap 0.1µF

Feel free to replace the LDO or output stage with parts you have in spare.