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STEP-STICK |
x 3 | |
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SC0915Raspberry PI
|
x 1 | |
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ULN2803A |
x 1 | |
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74HC238D,653 |
x 1 | |
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Adafruit TCA9548AAdafruit
|
x 1 | |
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BAV99 |
x 1 | |
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IRLB8721PBFInfineon Technologies
|
x 1 |
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KiCADKicad
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OwlBrd (ERCF + AFR controller)
Board for use with ERCF (Enraged Rabbit Carrot Feeder) and AFR (Automatic Filament Rewinder). This board is designed to supersede the easybrd with all the same components and then some for AFR. Your printer will still need a main board and this is designed for klipper.
BOM (split by functionality)
Misc (listed again throughout sections)
- Dupont male/female headers (Amazon Affiliate)
- Resistors - 1k, 10k, 2.37k, 4.7k used throughout (kit: Amazon affiliate)
- Ceramic capacitors: 0.33uF, 0.1uF used in ERCF/heater (kit: Amazon affiliate)
- Electrolytic capacitors: 100uF 25v used in ERCF/rewinder (kit: Amazon affiliate)
- JST-XH connectors: 2-pin, 3-pin, 4-pin (kit: Amazon affiliate)
- Screw terminals for power/heater (Amazon affiliate)
Core (Rewind Stepper + Clutches)
- Raspberry Pi Pico ([Digikey] headers are optional)
- BTT TMC2209 x1 ([Amazon affiliate] headers encouraged, note that UART is currently wired to the 4th pin and some like FYSETC use the 5th pin. You might be able to resolve this with a jumper on the pins on top?)
- 74HC238 DIP (Amazon affiliate) for clutch (addresses 8 pins using 3 GPIO)
- ULN2803A DIP (Amazon affiliate) for clutch (drives 8 clutches using one IC)
- Screw terminal for power
- Resistors: 10k (x1), 1k (x1)
- JST-XH 2 pin female (x8) for clutches
- JST-XH 4 pin female (x2) for rewinder steppers
- Electrolytic capacitor: 100uF 25v
Distance Sensors
- Adafruit TCA9548A (Amazon affiliate or adafruit) breakout (headers optional, cheaper generics available but one side is slightly wider by like 2.5mm -- might be able to rig something to fit it or could use wires)
- JST-XH 4 pin female (x8) for each sensor
ERCF
- BTT TMC2209 x2 ([Amazon affiliate] headers encouraged, note that UART is currently wired to the 4th pin and some like FYSETC use the 5th pin. You might be able to resolve this with a jumper on the pins on top?)
- L7805CV (Amazon affiliate) 5v linear regulator (probably plenty of substitutions for this but should be readily available -- any 5v regulator with same pinout should work) for supplying 5v power on board
- Resistors: 10k (x2)
- Ceramic capacitors: 0.33uF x1, 0.1uF x1
- Electrolytic capacitors: 100uF 25v (x2)
- JST-XH 3 pin female (x4) for servo, encoder, endstop, and optional neopixel/misc
- JST-XH 4 pin female (x2) for selector/gear steppers
Heater
- IRLB8721PBF (Amazon affiliate) MOSFET (probably lots of substitutable options but should be readily available)
- BAV99 SMD ([Amazon affiliate] only surface mount component -- shouldn't be too difficult to solder or need anything special, needed for thermistor)
- Screw terminal (or connector of your choice) for heater
- Resistors: 2.37k (x2), 4.7k (x1)
- Ceramic capacitor: 0.1uF
- JST-XH 2 pin female (for thermistor)
UART
There's a breakout for UART with power for pi. If you use UART, and don't connect pico to USB, you'll want to put a header and jumper on J29 Ext Power so that it powers the pico from the 5v regulator. Install the 0.33uF and 0.1uF capacitors and L7805CV from ERCF section to get 5v power if needed.
OwlBrd (ERCF + AFR controller)
*PCBWay community is a shared platform and we are not responsible for any design issues.
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- Alexander Nagelberg Oct 20,2022
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