2 layers99.8 × 99.8 mm
2 layers99.8 × 99.8 mm
MECB SID
epaell/MECB6- Size
- 99.8 × 99.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 113
- Pads
- 275
- Tracks, vias
- 655, 27
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Jul 2024
- Updated
- 25 Oct 2026
Overview
MECB SID is an open-source printed circuit board by epaell, from the epaell/MECB repository on GitHub. It is a 2-layer board of 99.8 × 99.8 mm with 42 parts on 113 nets, routed with 655 tracks and 27 vias.
It is built around the 74LS374PC. Its parts include 19 capacitors, 6 resistors, 5 ICs, 4 connectors and 2 transistors. It belongs with the FPGA and CPLD boards of this library.
Main components
1README
SDCardShield/README.mdSDCardShield
A version of the SD Card shield that was originally developed by Corsham Technologies for the SWTPC. It has been modified to work with the MECB I/O board (PIA port) and makes use of Adafruit modules to implement the realtime clock:
https://core-electronics.com.au/adafruit-ds3231-precision-rtc-breakout.html
and microSD interface:
https://core-electronics.com.au/microsd-card-breakout-board.html
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C6, C7, C8, C13, C14, C15 |
| 5 | 0.1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C19 |
| 5 | 10uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C9, C10, C12, C17, C18 |
| 4 | 1K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1, R3, R4, R6 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | 100nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C5, C16 |
| 2 | 10K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R2, R5 |
| 2 | 2N2222 | Package_TO_SOT_THT:TO-92L_HandSolder | Q1, Q2 |
| 2 | 6581 | Package_DIP:DIP-28_W15.24mm_Socket_LongPads | U2, U4 |
| 2 | 74LS374 | Package_DIP:DIP-20_W7.62mm_Socket_LongPads | U3, U5 |
| 2 | AudioJack3_SwitchTR | Connector_Audio:Jack_3.5mm_CUI_SJ1-3525N_Horizontal | J2, J4 |
| 1 | 1 MHz | Oscillator:Oscillator_DIP-8_LargePads | Y1 |
| 1 | 4.7uF | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C11 |
| 1 | ATF16V8 | Package_DIP:DIP-20_W7.62mm_Socket_LongPads | U1 |
| 1 | Jumper_3_Bridged12 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | MD205S-12B | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | MECB_64AC | MyCustomFootprintLibrary:DIN41612_C_2x32_C64AC_Male_Horizontal_THT | J1 |
Questions
How big is the MECB SID PCB?
It measures 99.8 × 99.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MECB SID use?
42 parts, built around the 74LS374PC. 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 MECB SID KiCad files?
From the epaell/MECB repository on GitHub, at the commit this page was made from: the board is MECB_SID/MECB_SID.kicad_pcb and its schematic 68008Tester/68008test.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MECB SID design in my own project?
Its repository states no licence, so its author keeps all rights: ask epaell before reusing the design.
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