4 layers45 × 24 mm
2 layers40 × 50 mm
PWMlaserBoard
Ccecil/PWMBoardBoard to breakout the PWM pins on a Gadgeteer header
- Size
- 40 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 33
- Pads
- 126
- Tracks, vias
- 231, 31
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 5 May 2024
- Updated
- 5 May 2024
Overview
PWMlaserBoard is an open-source printed circuit board by Ccecil, from the Ccecil/PWMBoard repository on GitHub. It is a 2-layer board of 40 × 50 mm with 52 parts on 33 nets, routed with 231 tracks and 31 vias.
It is built around the LMV331TP. Its parts include 16 resistors, 9 connectors, 4 transistors, 3 capacitors and 2 diodes.
Main components
1README
README.mdThis board is to be used to expand the PWM header from a V2 Smoothieboard (or Gadgeteer) header.
- 4 mosfet buffered PWM outputs with jumper options to select between Pullup voltages and/or disable the pullup resistor for Opendrain outputs.
- 2 Switch inputs which are debounced with passives and have optional pullup resistor/voltage.
- 1 Comparator probe input which increases the repeatability of probes and allows use of probe voltages from 3-45v (through jumper configs)
- Optional voltage input for using higher voltages on the PWM output pin3 (i.e. Running higher voltages to the servo motor or using different 5v source)
Comparator probe input jumper options
- J5 pin 3 input voltage set to
- 2.9v-5v (default)
- 5-24v (JP5-2 cut)
- 6-45v (JP5-2 and JP5-3 cut)
PWM output and Switch input jumpers.
- JP2: J6-J9 pin 3 optional voltage source select (J1 Pin 2 default, cut to use J2 Pin 1)
- JP3-1: J3 pin 1 and pin 3 pullup Voltage select
- JP3-2: J3 pin 3 pullup disable
- JP4-1: J4 pin 1 and pin 3 pullup Voltage select
- JP4-2: J4 pin 3 pullup disable
- JP5-1: J5 pin 1 Voltage select
- JP5-2: J5 pin 3 pullup cut (required for HV operation)
- JP5-3: J5 pin 3 Low/High voltage select (default low)
- JP6: J6 pin 1 pullup Voltage select
- JP7: J7 pin 1 pullup Voltage select
- JP8: J8 pin 1 pullup Voltage select
- JP9: J9 pin 1 pullup Voltage select
Jumper and connector numbers match their respective driving pin from the J1 header
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | Conn_01x03_Pin | Connector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | J3, J4, J5, J6, J7, J8, J9 |
| 7 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP3-1, JP4-1, JP5-1, JP6, JP7, JP8, JP9 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4, R5, R6 |
| 6 | 1k | Resistor_SMD:R_0402_1005Metric | R7, R8, R9, R11, R12, R14 |
| 5 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP2, JP3-2, JP4-2, JP5-2, JP5-3 |
| 4 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3 |
| 2 | 7.1k | Resistor_SMD:R_0402_1005Metric | R13, R16 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 1 | 3k | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | 8.2k | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | Conn_01x02_Pin | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J1 |
| 1 | D_Small | Diode_SMD:D_SOD-323 | D2 |
| 1 | D_Zener_Small | Diode_SMD:D_0402_1005Metric | D1 |
| 1 | LMV331 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | StencilHole | MountingHole:MountingHole_2.5mm | H3 |
The 50 most common of 52 parts.
Questions
How big is the PWMlaserBoard PCB?
It measures 40 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PWMlaserBoard use?
52 parts, built around the LMV331TP. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PWMlaserBoard KiCad files?
From the Ccecil/PWMBoard repository on GitHub, at the commit this page was made from: the board is PWMlaserBoard.kicad_pcb and its schematic PWMlaserBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PWMlaserBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ccecil before reusing the design.
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