PowerBRRR

48V injection daughter board for Step Stick drivers.

48V capable hardware

Mainboards

Manufacturer	HV ports	Capacitor rating	Max motor amperage (recommended)
Annex Engineering SuperNova	4	330µF 63V	3A per motor, 10A max total
BigTreeTech Octopus Pro	8	110µF 63V	1.1A
Fysetc Spider 2	2	110µF 63V	1.1A
Mellow FLY Gemini	4	110µF 50V	1.1A
Mellow FLY Super 8 HV	3	110µF 50V	1.1A

Stepper drivers

There are multiple HV-options (beyond 24V), pay close attention to the maximum safe voltage (based on the components on the boards)!

Manufacturer	Driver chip	Rated voltage	Max safe voltage	Max current
BigTreeTech TMC2130	TMC2130	45V	42V	2.5A
BigTreeTech TMC5160	TMC5160	35V	32V	3A
BigTreeTech TMC5160 Pro	TMC5160	60V	48V	3A
Fysetc TMC2130	TMC2130	45V	42V	2.5A
Fysetc TMC5160	TMC5160	35V	32V	3A
Fysetc TMC5160 HV	TMC5160	60V	48V	3A
IdeaFormer TMC2130 V1.2	TMC2130	45V	42V	2.5A
Mellow TMC5160 HV	TMC5160	60V	42V	3A
Watterott TMC2130	TMC2130	45V	42V	2.5A
Watterott TMC5160 HV	TMC5160	60V	48V	3A

The links provided are affiliate links, they cost you nothing extra but provide me with a small kick back to buy stuff for R&D

Warning

Using 48V electronics can cause serious harm on injury, only attempt to install this on your printer if you know what you are doing.

Under no circumstances I can be held responsible for harm or injury to any person or piece of equipment and you waiver all rights to hold me responsible for anything that happens as a result of using my design, or even thinking about my design.

Boards

• PowerBRRR for BigTreeTech SKR 1.x/2.x:
  • Gerber_PowerBRRR SKR
• PowerBRRR for BigTreeTech SKR Pro/Octopus, Fysetc Spider, FLY F407, etc.:
  • Gerber_PowerBRRR Octopus_Spider

Suggested manufacturing is using 2oz copper or gold traces.

Bill of materials

• 1x 220µF (2A) / 330µF (3A) / 470µF (4A) 63V 13x25 capacitor
• 1x WJ127-5.0-2P screw terminal
• 2x 8P 2.54mm pitch stacking headers
• 1x 2P 2.54mm pitch stacking headers
• 1x SOD123FL

Assembly

Make sure the VM pin is cut short; you can leave GND:

Suggested stepstick and motor power connector placement:

Cover the back with kapton tape, nobody likes to get zapped accidentally (unless it generates views you can monetize).

Builds

Fysetc Spider 1.x by netweaver

This is on the Fysetc Spider 1.x mainboard (8 driver slots).