2 layers100 × 50 mm
2 layers50 × 50 mm
Main board a4988
evilosa/lead-machineMachine to automatically feed lead
- Size
- 50 × 50 mm
- Copper layers
- 2
- Thickness
- 1.59 mm
- Parts
- 24
- Nets
- 45
- Pads
- 112
- Tracks, vias
- 145, 25
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 13 Dec 2024
- Updated
- 1 Feb 2025
Overview
Main board a4988 is an open-source printed circuit board by evilosa, from the evilosa/lead-machine repository on GitHub. It is a 2-layer board of 50 × 50 mm with 24 parts on 45 nets, routed with 145 tracks and 25 vias.
It is built around the ATMEGA8-16PC, L293D and L7805. Its parts include 8 capacitors, 5 resistors, 4 connectors, 3 ICs and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA8-16PC
PDIP-280℃~+70℃ 10bit 16MHz 1KB 23 4.5V~5.5V 512Byte 8 Bit 8KB AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC)Microchip TechnologyMicrocontrollers (MCU/MPU/SOC)
L293D
DIP-16-40℃~+150℃ 1.2A 2 4.5V~36V 4mA 600mA DIP-16 Brushed DC Motor Drivers ROHSSTMicroelectronicsStepper Motor Driver
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3, R4, R5 |
| 3 | 0.1 | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C6 |
| 2 | 15 | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7, C8 |
| 1 | 0.1 uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C5 |
| 1 | 0.33 uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 4.7uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 8Mhz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | ATmega8-16P | Package_DIP:DIP-28_W7.62mm | U3 |
| 1 | AVR-ISP-6 | Connector_IDC:IDC-Header_2x03_P2.54mm_Vertical | J1 |
| 1 | Conn_01x07_Socket | Connector_JST:JST_EH_S7B-EH_1x07_P2.50mm_Horizontal | J4 |
| 1 | L293D | Package_DIP:DIP-16_W7.62mm | U1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LOGO | Local:sorc-logo | G*** |
| 1 | Nema17 Stepper engine | Connector_JST:JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J2 |
| 1 | Pololu_Breakout_A4988 | Module:Pololu_Breakout-16_15.2x20.3mm | A1 |
| 1 | Power source | Connector_Wire:SolderWire-0.5sqmm_1x02_P4.6mm_D0.9mm_OD2.1mm | J3 |
| 1 | Power switch | Connector_Wire:SolderWire-0.5sqmm_1x02_P4.6mm_D0.9mm_OD2.1mm | SW1 |
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Questions
How big is the Main board a4988 PCB?
It measures 50 × 50 mm and has 2 copper layers, 1.59 mm thick.
What parts does the Main board a4988 use?
24 parts, built around the ATMEGA8-16PC, L293D and L7805. 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 Main board a4988 KiCad files?
From the evilosa/lead-machine repository on GitHub, at the commit this page was made from: the board is electronic/main-board-a4988/main-board.kicad_pcb and its schematic electronic/front-panel/front-panel.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Main board a4988 design in my own project?
Its repository states no licence, so its author keeps all rights: ask evilosa before reusing the design.