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STD ESP32 CNC shield for FluidNC and 3 external drivers (V1.3)
License: Public Domain
Mode: Editors' pick
Note: This board has not yet been tested.
CNC board for ESP32 and FluidNC. Can be used with general GRBL senders, such as UGS. The board supports 3 external drivers, such as the 2160 Makerbot driver.
The connectors for these external drivers follow the PMinMo standard (http://www.massmind.org/techref/io/PMinMO.htm)
An external relay board with 4 relays may be connected, to switch, for example, the spindle on or off.
A possible relay board is the HW-316 4 relay board. Connections fit with that board.
All outputs are 5V, and able to power the opto-couplers that are generally found on stepper driver boards (which usually have a 270..330 Ohm series resistor).
An important feature of this board is that limit switches and other inputs are opto-isolated, thereby improving reliability.
Also ground for these inputs is isolated from the ESP32 ground.
Possible switches are HALL-Sensors, such as the LM393 3144 Hall Sensor Modules.
Normal opened (NO) limit switches should also work, and be connected to pin 1 (marked -) and 2 (middle) of each connector.
The board has holes at the same positions as a Raspberry-Pi board. In fact, the board was developed to replace my existing Raspberry Pi plus Protoneer boards,
which do not provide opto-isolation and can not easily be controlled via UGS.
My original idea was to develop a (cheap) board for THT, which needed to be assembled by myself. However, after I calculated the costs of assembly by JLCPCB,
I decided to go for partially assembled board. Connectors must still be assembled manually, however.Whenever possible, basic components were used, to lower costs.
The board needs to be powered via a separate 5 Volt external power supply.
Pin assignment
Open in EditorESP32
Open in EditorInput
Open in EditorOutput
Open in EditorSD-Card
Open in EditorPower
Open in EditorID | Name | Designator | Footprint | Quantity | Manufacturer Part | Manufacturer | Supplier | JLCPCB Part Class | link | |
---|---|---|---|---|---|---|---|---|---|---|
1 | 10uF | C12,C5,C6 | C0805 | 3 | CL21A106KAYNNNE | SAMSUNG | LCSC | C15850 | CL21A106KAYNNNE | |
2 | SS34_C8678 | D1 | SMA_L4.3-W2.6-LS5.2-RD | 1 | SS34 | MDD | LCSC | C8678 | SS34_C8678 | |
3 | 2.54-1*19P母 | J1 | HDR-TH_19P-P2.54-V-F | 1 | 2.54-1*19P | BOOMELE | LCSC | C319202 | 2.54-1*19P母 | |
4 | ESP32-S2-LEFT | J2 | HDR-TH_19P-P2.54-V-F | 1 | 2.54-1*19P | BOOMELE | LCSC | C319202 | ESP32-S2-LEFT | |
5 | ESP32-S2-RIGHT | J3 | HDR-TH_19P-P2.54-V-F | 1 | 2.54-1*19P | BOOMELE | LCSC | C319202 | ESP32-S2-RIGHT | |
6 | EL357N(C)(TA)-G | OK1,OK2,OK3,OK4,OK5,OK6,OK7,OK8 | OPTO-SMD-4_L4.4-W4.1-P2.54-LS7.0-TL | 8 | EL357N(C)(TA)-G | EVERLIGHT(亿光) | LCSC | C29981 | EL357N(C)(TA)-G | |
7 | 1kΩ | R1,R2,R3,R4,R5,R10,R11,R12,R14 | R0603 | 9 | 0603WAF1001T5E | UNI-ROYAL(厚声) | LCSC | C21190 | 0603WAF1001T5E | |
8 | 220Ω | R6,R7,R8,R9,R13,R18,R19,R20 | R0603 | 8 | 0603WAF2200T5E | UNI-ROYAL(厚声) | LCSC | C22962 | 0603WAF2200T5E | |
9 | 100nF | C1,C8,C9,C10,C4 | C0603 | 5 | CC0603KRX7R9BB104 | YAGEO | LCSC | C14663 | CC0603KRX7R9BB104 | Basic |
10 | MC74ACT125DR2G | U1,U2,U3,U4 | SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL | 4 | MC74ACT125DR2G | onsemi | LCSC | C113254 | MC74ACT125DR2G | |
11 | TF-01A | SD1 | TF-SMD_TF-01A | 1 | TF-01A | Korean Hroparts Elec | LCSC | C91145 | TF-01A | |
12 | 19-217/GHC-YR1S2/3T | LED1 | LED0603-RD | 1 | 19-217/GHC-YR1S2/3T | EVERLIGHT(亿光) | LCSC | C72043 | 19-217/GHC-YR1S2/3T | |
13 | 4.7kΩ | R15 | R0603 | 1 | 0603WAF4701T5E | UNI-ROYAL(厚声) | LCSC | C23162 | 0603WAF4701T5E | |
14 | B0505S-1WR3 | U10 | PWRM-TH_B0503S-1WR2 | 1 | B0505S-1WR3 | MORNSUN | LCSC | C131038 | B0505S-1WR3 |
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